https://DevOpsCloud.io -- Cloud Monk Losang Jinpa, Ph.D., MCSE/MCT, GitOps DevOps Engineer

Return to RHEL, Fedora Glossary, Linux Glossary

RHEL (Red Hat Enterprise Linux) is a commercial Linux distribution developed by Red Hat, designed for enterprise use. It provides a stable and secure platform with long-term support, making it widely adopted in enterprise environments for server, cloud, and desktop use. https://en.wikipedia.org/wiki/Red_Hat_Enterprise_Linux

YUM (Yellowdog Updater, Modified) is the package management utility used in earlier versions of RHEL for managing software installations and updates. It automatically resolves dependencies and simplifies the process of installing, updating, and removing software packages. YUM has been replaced by DNF in RHEL 8. https://en.wikipedia.org/wiki/Yellowdog_Updater,_Modified

DNF (Dandified YUM) is the package manager introduced in RHEL 8, replacing YUM. It improves performance, reduces memory usage, and offers better dependency management. DNF is now the default package management tool in RHEL for installing, updating, and removing software. https://en.wikipedia.org/wiki/DNF_(software)

RPM (Red Hat Package Manager) is the core package management system used by RHEL to install, update, and manage software packages. It is used to install .rpm files and ensures system stability by tracking dependencies and preventing conflicts during software installation. https://en.wikipedia.org/wiki/RPM_Package_Manager

SELinux (Security-Enhanced Linux) is a security feature integrated into RHEL that enforces strict access control policies, limiting the actions that users and programs can perform. It helps mitigate security risks by enforcing mandatory access controls. https://en.wikipedia.org/wiki/Security-Enhanced_Linux

Red Hat Satellite is a systems management platform used to manage RHEL environments, offering automation tools for provisioning, patch management, and configuration. It simplifies the management of large-scale RHEL deployments, ensuring systems remain secure and up-to-date. https://en.wikipedia.org/wiki/Red_Hat_Satellite

Cockpit is a web-based management interface included with RHEL that allows administrators to monitor and manage systems through a browser. It provides tools for managing services, monitoring logs, and performing system updates, making it easier to manage RHEL servers. https://en.wikipedia.org/wiki/Cockpit_(software)

Kickstart is an automated installation method used in RHEL to deploy multiple systems with predefined settings. It allows administrators to create a configuration file that defines how systems should be installed, reducing the time required for manual installations. https://en.wikipedia.org/wiki/Kickstart_(Linux)

Ansible is an open-source automation tool integrated into the Red Hat ecosystem for configuration management, application deployment, and task automation. Ansible uses an agentless architecture and operates over SSH, making it easy to manage large RHEL environments. https://en.wikipedia.org/wiki/Ansible_(software)

Red Hat Insights is a predictive analytics tool available in RHEL that helps identify and resolve potential issues before they cause problems. It analyzes systems to provide recommendations on security, performance, and configuration, helping prevent outages and vulnerabilities. https://access.redhat.com/products/red-hat-insights

Red Hat Subscription Manager (RHSM) is a tool used to register, manage, and attach RHEL systems to subscriptions, ensuring that the system is licensed and receives updates and support. It connects to the Red Hat Customer Portal or Satellite to provide access to official repositories and software entitlements. https://access.redhat.com/products/red-hat-subscription-management

SystemTap is a dynamic tracing and monitoring tool used in RHEL for diagnosing performance issues and understanding the behavior of the kernel and user-space applications. It provides a detailed analysis of running processes, helping administrators debug complex problems. https://en.wikipedia.org/wiki/SystemTap

RHEL Atomic Host is a lightweight version of RHEL optimized for running containers. It includes the essential tools for deploying and managing containerized workloads, making it ideal for cloud and container-based environments. https://en.wikipedia.org/wiki/Red_Hat_Enterprise_Linux_Atomic_Host

Kpatch is a RHEL feature that allows administrators to apply kernel patches without rebooting the system. This feature is crucial for minimizing downtime in production environments while maintaining system security by keeping the kernel up-to-date. https://en.wikipedia.org/wiki/Kpatch

Performance Co-Pilot (PCP) is a monitoring framework in RHEL used to collect, analyze, and archive performance metrics from systems. It supports both real-time and historical data analysis, helping administrators monitor and improve system performance over time. https://en.wikipedia.org/wiki/Performance_Co-Pilot

Red Hat Cluster Suite is a set of clustering and high-availability tools used in RHEL to provide redundancy and failover for critical services. It ensures that applications remain available in case of hardware or software failure, making it essential for mission-critical environments. https://en.wikipedia.org/wiki/Red_Hat_Cluster_Suite

OpenShift is an enterprise Kubernetes platform developed by Red Hat that integrates with RHEL. It automates the deployment and management of containerized applications across hybrid and multi-cloud environments, providing scalability and resilience. https://en.wikipedia.org/wiki/OpenShift

GlusterFS is a scalable, distributed file system developed by Red Hat and often used in conjunction with RHEL to provide storage solutions for unstructured data. It enables administrators to manage large volumes of data across multiple storage servers. https://en.wikipedia.org/wiki/GlusterFS

Red Hat Identity Management (IdM) is an integrated solution in RHEL for managing user identities, authentication, and access control. It is based on FreeIPA and is used to enforce centralized authentication policies across an enterprise environment, integrating with Active Directory. https://access.redhat.com/products/identity-management

SCAP Security Guide (SSG) is a security content project included with RHEL that provides guidelines and policies for system hardening. It supports the Security Content Automation Protocol (SCAP) and helps organizations meet compliance standards such as PCI DSS and HIPAA. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/security_guide/scap

RHEL Real Time is a version of RHEL designed to meet the needs of industries that require deterministic, low-latency responses in real-time applications. It includes kernel modifications and performance optimizations to ensure predictable response times, making it ideal for use in telecommunications, financial trading, and industrial automation. https://access.redhat.com/products/red-hat-enterprise-linux-add-ons/real-time

Red Hat Virtualization (RHV) is an enterprise virtualization platform that uses the KVM hypervisor and integrates with RHEL to manage virtual machines. It provides a feature-rich environment for creating, deploying, and managing virtualized workloads, supporting both Linux and Windows guests. https://en.wikipedia.org/wiki/Red_Hat_Virtualization

Red Hat Developer Toolset (DTS) is a collection of development tools provided for RHEL users. It includes the latest versions of compilers like GCC, debuggers, and performance monitoring tools, allowing developers to use up-to-date software development tools without affecting the system’s default versions. https://access.redhat.com/documentation/en-us/red_hat_developer_toolset/10/html/user_guide/

ABRT (Automatic Bug Reporting Tool) is a diagnostic tool in RHEL that helps users detect and report application crashes and kernel oopses. It automatically generates reports that can be sent to administrators or developers, enabling quicker troubleshooting and debugging of system problems. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/troubleshooting_guide/chap-abrt

Libguestfs is a set of tools for accessing and modifying virtual machine disk images in RHEL. It allows administrators to perform operations such as viewing and editing files inside virtual disks, making it useful for managing virtualized environments. https://en.wikipedia.org/wiki/Libguestfs

Sosreport is a command-line tool in RHEL that collects system configuration and diagnostic information. It generates a compressed archive that can be used by support teams for troubleshooting, helping to quickly identify potential issues on the system. https://access.redhat.com/solutions/3592

Sssd (System Security Services Daemon) is a service in RHEL that provides access to remote identity and authentication providers such as LDAP and Active Directory. It caches user credentials and makes it easier to manage authentication for users in complex environments. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/system-level_authentication_guide/sssd

Red Hat Enterprise Linux High Availability Add-On provides clustering functionality that ensures critical applications remain available even in the event of system or component failures. This is crucial for environments where uptime and availability are of utmost importance. https://access.redhat.com/products/red-hat-enterprise-linux-add-ons/high-availability

Leapp is a utility included in RHEL to automate in-place upgrades from RHEL 7 to RHEL 8. It simplifies the migration process by analyzing the system, identifying potential issues, and ensuring a smooth transition between major versions without manual reinstallation. https://access.redhat.com/documentation/en-us/leapp/0.12/html/leapp_overview/index

VDO (Virtual Data Optimizer) is a feature in RHEL that provides inline deduplication and compression for storage volumes. It reduces the amount of storage needed for large datasets, optimizing disk usage and improving efficiency in environments with heavy storage requirements. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/managing_storage_devices/using-vdo-to-optimize-storage-space

Podman is a container management tool included in RHEL that allows users to run and manage containers without requiring a central daemon, unlike Docker. It is designed for managing Open Container Initiative (OCI) containers and supports rootless containers, making it more secure and flexible in enterprise environments. https://en.wikipedia.org/wiki/Podman

Firewalld is a dynamic firewall management tool in RHEL that provides a front-end for iptables. It allows administrators to configure network traffic rules without disrupting existing connections, offering zone-based management of firewall rules for easier security management. https://en.wikipedia.org/wiki/Firewalld

Chrony is the default Network Time Protocol (NTP) implementation in RHEL used for time synchronization. It provides fast and accurate time synchronization with minimal system resources, making it ideal for environments with intermittent network connections or virtualization. https://en.wikipedia.org/wiki/Chrony

NetworkManager is a network configuration tool included in RHEL that simplifies the management of network interfaces and connections. It provides a graphical interface for configuring wired, wireless, and VPN connections, making it easier to manage complex networking setups. https://en.wikipedia.org/wiki/NetworkManager

Stratis is a volume management tool in RHEL that simplifies the management of storage devices by abstracting the complexities of LVM and XFS. It allows administrators to create and manage storage pools, snapshots, and thin provisioning more easily. https://en.wikipedia.org/wiki/Stratis_(software)

Skopeo is a tool used in RHEL to inspect, transfer, and manage container images. It allows users to work with container images stored in different registries without requiring a local container runtime, supporting various image formats and transports. https://github.com/containers/skopeo

Tuned is a system tuning tool in RHEL that optimizes system performance based on predefined profiles. It automatically adjusts system parameters such as CPU and disk I/O to meet the performance requirements of different workloads, such as database servers or virtual machines. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_and_managing_system_performance/using-the-tuned-adaptive-system-tuning-daemon_configuring-and-managing-system-performance

KSYMS (Kernel Symbols) is a debugging tool in RHEL used to list symbols exported by the kernel. It provides visibility into the kernel’s symbol table, helping administrators and developers debug kernel-related issues and analyze system performance. https://en.wikipedia.org/wiki/Ksyms

dm-crypt is a transparent disk encryption subsystem in RHEL that provides encryption at the block device level. It is used with LUKS (Linux Unified Key Setup) to encrypt entire partitions or volumes, ensuring data security for sensitive information on disk. https://en.wikipedia.org/wiki/Dm-crypt

Red Hat Directory Server is an LDAP-compliant directory service included in RHEL that provides centralized identity and authentication services. It is commonly used to manage user accounts, permissions, and other directory-based information across an enterprise environment. https://en.wikipedia.org/wiki/Red_Hat_Directory_Server

OpenSCAP is an open-source implementation of the Security Content Automation Protocol (SCAP) in RHEL. It helps administrators automate security auditing, vulnerability scanning, and configuration assessments based on security policies and standards like CIS, DISA STIGs, and PCI-DSS. https://en.wikipedia.org/wiki/Security_Content_Automation_Protocol

Red Hat Smart Management is an add-on for RHEL that extends the management capabilities of Red Hat Satellite. It enables lifecycle management and compliance across hybrid environments, helping organizations maintain security and operational consistency from on-premise infrastructure to cloud deployments. https://access.redhat.com/products/red-hat-smart-management

dm-verity is a RHEL feature used to ensure the integrity of block devices by verifying the data at the block level. It is primarily used for ensuring the integrity of read-only file systems and is crucial in environments where data consistency is a top priority, such as in embedded systems or containers. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/security_hardening/using-device-mapper-verity_security-hardening

SCAP Workbench is a graphical user interface tool that allows users to perform security compliance scans and generate reports using the OpenSCAP framework in RHEL. It simplifies the task of customizing security policies and generating reports for compliance. https://www.open-scap.org/tools/scap-workbench/

GFS2 (Global File System 2) is a shared-disk file system included in RHEL that allows multiple nodes to access and manage the same file system concurrently. It is commonly used in cluster environments where high availability and data consistency across nodes are critical. https://en.wikipedia.org/wiki/GFS2

Red Hat Insights for Vulnerability is a component of Red Hat Insights that helps detect, prioritize, and remediate security vulnerabilities in RHEL environments. It provides administrators with security risk assessments and recommended actions to mitigate potential threats. https://access.redhat.com/products/red-hat-insights

Auditd is a daemon in RHEL used to track system events and generate audit logs. It helps administrators monitor system activity for security-related events, such as unauthorized file access or policy violations, aiding in compliance with security regulations like PCI DSS or HIPAA. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/security_hardening/using-the-audit-system-to-monitor-system-activity_security-hardening

Red Hat Certificate System is a Public Key Infrastructure (PKI) toolset integrated with RHEL for managing digital certificates. It provides secure certificate management for both internal and external-facing applications, ensuring trust in identity verification and encryption. https://en.wikipedia.org/wiki/Red_Hat_Certificate_System

FIPS 140-2 Compliance in RHEL refers to the Federal Information Processing Standards (FIPS) certification for cryptographic modules used in secure government and enterprise environments. RHEL includes FIPS-compliant libraries and tools, enabling organizations to meet strict security requirements. https://en.wikipedia.org/wiki/FIPS_140-2

XDP (eXpress Data Path) is a high-performance network data path in RHEL that allows for fast packet processing directly in the kernel, bypassing much of the traditional network stack. It is used in environments where low-latency networking is essential, such as high-frequency trading or telecommunications. https://en.wikipedia.org/wiki/Express_Data_Path

RHEL System Roles are pre-configured Ansible roles designed to automate common system administration tasks in RHEL. These roles simplify the configuration of network settings, security policies, and storage management across multiple systems, ensuring consistency and reducing manual effort. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/automating_system_administration_with_ansible_system_roles

Identity Management Trusts in RHEL provide the ability to create trust relationships between RHEL Identity Management (IdM) and Active Directory. This allows seamless cross-platform authentication, enabling users from one domain to access resources in the other without needing separate credentials. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_identity_management/setting-up-trusts-with-active-directory

Red Hat Performance Tuning is a set of tools and best practices integrated into RHEL that help administrators optimize system performance based on the type of workload. These include utilities like Tuned profiles and performance monitoring tools to adjust CPU, memory, and I/O settings dynamically. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_and_managing_system_performance

OpenShift Service Mesh is an add-on for OpenShift and RHEL environments that enables microservices to communicate securely and efficiently. It provides observability, traffic management, and security for services without requiring changes to the underlying application code. https://access.redhat.com/documentation/en-us/openshift_container_platform/4.6/html/service_mesh

RHEL Atomic Scan is a security feature used for scanning containers for vulnerabilities. It integrates with RHEL and helps administrators identify and address security risks in containerized applications by scanning for known vulnerabilities in the container’s packages and libraries. https://www.redhat.com/en/topics/containers

Red Hat Gluster Storage is a scalable, distributed file system often used in conjunction with RHEL to manage unstructured data. It is designed to handle large-scale storage environments, providing redundancy and high availability for enterprise storage. https://access.redhat.com/documentation/en-us/red_hat_gluster_storage

Red Hat OpenStack Platform is a cloud computing solution built on top of RHEL that provides Infrastructure-as-a-Service (IaaS) capabilities. It enables organizations to create and manage large-scale cloud environments, offering tools for compute, storage, and networking services. https://en.wikipedia.org/wiki/Red_Hat_OpenStack_Platform

Red Hat Universal Base Image (UBI) is a container image derived from RHEL, designed for building, running, and distributing containerized applications. It is freely redistributable, allowing developers to create containers with the assurance of RHEL’s security and support. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/building_running_and_managing_containers

NFV (Network Functions Virtualization) in RHEL refers to the practice of virtualizing network functions typically performed by dedicated hardware appliances. RHEL provides a stable and secure platform for NFV in telecommunications environments, enabling faster deployment of network services. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/networking_guide/network-function-virtualization

Red Hat Quay is a container registry platform that provides secure and scalable storage for container images. Integrated with RHEL, it supports OCI-compliant images and includes features like image scanning, image signing, and role-based access controls for enterprise-level container management. https://access.redhat.com/documentation/en-us/red_hat_quay

Red Hat Ceph Storage is a scalable, software-defined storage platform often deployed with RHEL for handling block, object, and file storage in cloud environments. It is used to manage massive amounts of data, providing fault tolerance and high availability. Ceph is ideal for cloud, virtualization, and container environments. https://en.wikipedia.org/wiki/Ceph_(software)

RHEL Network Bonding is a feature that allows multiple network interfaces to be combined into a single logical interface to provide increased bandwidth and redundancy. This capability is crucial for high-availability setups where network resilience is required. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/networking_guide/sec-network_bonding_using_the_command_line

Podman Compose is a tool used in RHEL for managing multi-container applications. It works similarly to Docker Compose, allowing users to define and manage multi-container environments through a single YAML file. It integrates with Podman to ensure lightweight container management. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/using_containers/getting-started-with-compose_on-podman

Red Hat Ansible Automation Platform extends Ansible's capabilities by providing a complete platform for enterprise-wide automation in RHEL. It includes automation workflows, reporting, and analytics, allowing large-scale automation of tasks such as configuration management and application deployment. https://access.redhat.com/documentation/en-us/red_hat_ansible_automation_platform

NFTables is a firewall framework included in RHEL that replaces iptables in more recent versions. It provides better performance and flexibility for network filtering and firewall management, allowing administrators to define more complex security policies. https://en.wikipedia.org/wiki/Nftables

RHEL Image Builder is a tool used for creating custom RHEL system images, suitable for deployment in cloud environments, containers, or physical hardware. Image Builder helps administrators create tailored images that include only the necessary software packages and configurations. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/composing_a_customized_rhel_system_image/index

RHEL FIPS Mode enables compliance with the FIPS 140-2 cryptographic standard, used by government and industry for secure communications. Enabling FIPS mode in RHEL ensures that only validated cryptographic modules are used, which is necessary for environments requiring enhanced security. https://access.redhat.com/articles/4274921

Leapp Utility is a tool in RHEL designed to automate in-place upgrades between major versions. It scans the system for compatibility issues, generates reports, and guides administrators through the upgrade process, minimizing manual intervention during migrations from one version of RHEL to another. https://access.redhat.com/documentation/en-us/leapp/0.12/html/leapp_overview/index

Tuned Profiles in RHEL allow administrators to optimize system performance for specific workloads by adjusting various system parameters like CPU, memory, and disk I/O. Predefined profiles exist for common workloads, such as database servers or virtualization hosts, ensuring optimal performance. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/managing_monitoring_and_updating_the_kernel/tuning-linux-systems-with-tuned_managing-monitoring-and-updating-the-kernel

RHEL OpenSCAP is a framework used to implement and enforce security policies and configurations. It helps administrators audit their RHEL systems for compliance with security standards such as CIS and DISA STIGs. The tool provides detailed reports and remediations for systems that fail audits. https://en.wikipedia.org/wiki/Security_Content_Automation_Protocol

Red Hat Container Registry is a platform that provides secure and scalable storage for container images, accessible via RHEL. It is integrated with Red Hat Quay and serves as a central repository for storing and distributing container images across development and production environments. https://access.redhat.com/containers

Kdump is a RHEL utility that captures system memory contents during a crash. It generates crash dumps that can be analyzed to determine the cause of the crash, allowing administrators to troubleshoot and resolve system failures more effectively. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_and_managing_system_performance/using-kdump-to-analyze-system-crashes_configuring-and-managing-system-performance

Red Hat Smart Management is an add-on for RHEL that integrates with Red Hat Satellite to automate patching, provisioning, and lifecycle management across on-premise and cloud environments. It helps ensure systems stay compliant and secure by automating the management of software updates. https://access.redhat.com/products/red-hat-smart-management

Chrony is the default NTP implementation in RHEL used for time synchronization. It offers better accuracy and performance over ntpd, especially in environments with frequent network interruptions or virtualization. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_and_managing_networking/chrony-using-the-chrony-suite-to-configure-ntp_configuring-and-managing-networking

LVM (Logical Volume Manager) is a storage management system in RHEL that allows administrators to create, resize, and manage disk volumes easily. LVM provides flexibility in managing disk space, supporting features like snapshots, volume expansion, and mirroring, essential for enterprise storage solutions. https://en.wikipedia.org/wiki/Logical_Volume_Manager_(Linux)

RHEL Atomic Host is a specialized, minimal version of RHEL designed to run containerized applications with a focus on efficiency and security. It is optimized for cloud and container workloads and includes the essential tools to deploy and manage containers. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux_atomic_host/7/html/overview/index

Red Hat Developer Toolset provides developers using RHEL with access to the latest stable versions of development tools, including compilers like GCC, debuggers, and performance monitoring tools. This toolset enables modern application development without affecting the default system tools. https://access.redhat.com/documentation/en-us/red_hat_developer_toolset

Libvirt is a toolkit used in RHEL to manage virtualization technologies like KVM and QEMU. It provides a unified interface to create, manage, and monitor virtual machines, offering a consistent management layer for different hypervisors. https://en.wikipedia.org/wiki/Libvirt

OProfile is a performance monitoring tool in RHEL used for profiling system performance at the kernel and application levels. It helps administrators identify performance bottlenecks and optimize both hardware and software configurations for improved efficiency. https://en.wikipedia.org/wiki/OProfile

VDO (Virtual Data Optimizer) is a feature in RHEL that provides inline deduplication and compression for block storage. It reduces storage usage by eliminating duplicate data and compressing the remaining data, helping organizations manage large-scale storage environments more efficiently. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/managing_storage_devices/using-vdo-to-optimize-storage-space

Red Hat High Availability Add-On is an optional component in RHEL that provides clustering capabilities to ensure that critical applications remain available in the event of a system failure. It is used to create failover clusters that automatically transfer services to another node in case of hardware or software failure. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/high_availability_add-on_overview

SCAP Security Guide (SSG) is a project within RHEL that provides security content and tools for auditing and compliance with various security standards, such as CIS and DISA STIGs. It helps administrators enforce security policies and automate security auditing tasks. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/security_hardening/security-compliance-and-scap-security-guide_security-hardening

Red Hat Identity Management (IdM) is a centralized identity, authentication, and access management solution built into RHEL. It integrates with Active Directory and provides a unified system for managing user identities, roles, and policies across a network of systems. https://access.redhat.com/products/identity-management

Tuned is a daemon in RHEL that dynamically tunes system settings to optimize performance based on specific profiles. It automatically adjusts parameters like CPU frequency, disk I/O, and network settings to match the workload, providing better performance for different use cases such as database servers or virtual machines. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_and_managing_system_performance/using-the-tuned-adaptive-system-tuning-daemon_configuring-and-managing-system-performance

KVM (Kernel-based Virtual Machine) is the default hypervisor in RHEL, providing full virtualization support for Linux and Windows guests. It leverages hardware virtualization features to allow multiple operating systems to run concurrently on a single physical machine, making it a core component of RHEL's virtualization capabilities. https://en.wikipedia.org/wiki/Kernel-based_Virtual_Machine

OpenShift Service Mesh is a service mesh technology included in OpenShift and integrated with RHEL, allowing microservices to communicate securely and efficiently. It provides traffic management, service discovery, and observability for containerized applications running across distributed environments. https://access.redhat.com/documentation/en-us/openshift_container_platform/4.7/html/service_mesh

Red Hat Satellite is a systems management solution for RHEL that automates tasks like patch management, provisioning, and configuration. It is used to manage large RHEL environments, ensuring that systems stay secure, compliant, and up-to-date across data centers and cloud environments. https://en.wikipedia.org/wiki/Red_Hat_Satellite

Cockpit is a web-based graphical interface included with RHEL that simplifies server management tasks. It allows administrators to manage storage, network settings, and system updates through a user-friendly interface, reducing the need for command-line tools. https://en.wikipedia.org/wiki/Cockpit_(software)

SystemTap is a tracing and performance analysis tool in RHEL used for monitoring and diagnosing kernel and user-space applications in real time. It helps developers and system administrators collect data on system behavior, making it easier to debug performance issues and optimize applications. https://en.wikipedia.org/wiki/SystemTap

OpenStack on RHEL is a cloud computing platform that allows organizations to build and manage public and private clouds. It provides Infrastructure-as-a-Service (IaaS) capabilities, enabling users to create and manage virtual machines, storage, and networking resources in large-scale cloud environments. https://en.wikipedia.org/wiki/OpenStack

Red Hat Gluster Storage is a software-defined storage solution integrated with RHEL, designed to manage unstructured data. It provides scalable and distributed storage across multiple nodes, ensuring high availability and fault tolerance for large-scale data management in enterprise environments. https://access.redhat.com/documentation/en-us/red_hat_gluster_storage

Red Hat Quay is a container registry platform designed to store and manage container images securely. Integrated with RHEL, it provides features like image scanning, role-based access control, and automatic image updates, helping enterprises manage containers at scale. https://access.redhat.com/documentation/en-us/red_hat_quay

Red Hat OpenShift is a Kubernetes-based container orchestration platform built on top of RHEL. It automates the deployment, scaling, and management of containerized applications, making it a popular choice for enterprises adopting microservices and cloud-native architectures. https://en.wikipedia.org/wiki/OpenShift

Virtual Data Optimizer (VDO) is a feature in RHEL that provides inline data deduplication and compression for block storage devices. It helps reduce storage costs by optimizing disk usage, making it particularly useful in environments with large volumes of repetitive data. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/managing_storage_devices/using-vdo-to-optimize-storage-space

Red Hat Smart Management is an add-on to RHEL that integrates with Satellite to automate the management of system patches, configurations, and compliance. It provides visibility and control over large-scale RHEL deployments, helping organizations maintain security and compliance across hybrid environments. https://access.redhat.com/products/red-hat-smart-management

XFS is the default file system in RHEL 7 and later versions, known for its scalability and performance with large data sets. It supports advanced features like dynamic inode allocation, snapshots, and online defragmentation, making it ideal for enterprise workloads that require robust storage management. https://en.wikipedia.org/wiki/XFS

Red Hat High Availability Add-On allows organizations to create failover clusters in RHEL environments. It ensures that critical services remain available in the event of hardware or software failures by automatically transferring workloads to another node in the cluster. https://access.redhat.com/products/red-hat-enterprise-linux-add-ons/high-availability

Libguestfs is a toolkit for accessing and modifying virtual machine disk images in RHEL. It allows administrators to perform tasks such as viewing, editing, and copying files within virtual disks, providing a versatile tool for managing virtual environments. https://en.wikipedia.org/wiki/Libguestfs

ABRT (Automatic Bug Reporting Tool) is a diagnostic utility in RHEL that automatically detects and reports software crashes. It helps administrators and developers troubleshoot issues by capturing crash data and generating reports that can be sent for further analysis. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/troubleshooting_guide/troubleshooting-with-abrt_troubleshooting-guide

OpenSCAP is a security automation tool in RHEL used for security auditing and compliance. It provides administrators with tools to check their systems against security benchmarks, generate reports, and apply remediation measures to meet compliance standards like PCI DSS and HIPAA. https://en.wikipedia.org/wiki/OpenSCAP

Red Hat CloudForms is a hybrid cloud management platform that allows organizations to manage both public and private cloud environments, including RHEL-based infrastructure. It provides tools for monitoring, automation, and self-service provisioning, making it easier to manage complex cloud environments. https://en.wikipedia.org/wiki/Red_Hat_CloudForms

Satellite Capsule is a component of Red Hat Satellite that acts as a proxy, helping to extend Satellite’s management capabilities to remote environments. It handles content distribution, configuration management, and system updates for remote or geographically distributed systems running RHEL. https://access.redhat.com/documentation/en-us/red_hat_satellite/6.9/html/performing_administration_tasks/chap-red_hat_satellite-performing_administration_tasks-red_hat_satellite_capsule_server

Red Hat Directory Server is an LDAP-based directory service used to manage user identities, roles, and policies in a centralized manner across an enterprise environment. It integrates seamlessly with RHEL to provide secure and scalable directory services for managing authentication and authorization. https://en.wikipedia.org/wiki/Red_Hat_Directory_Server

RHEL Atomic Host is a minimal version of RHEL specifically designed for running containerized applications. It provides a lightweight operating system optimized for deploying containers at scale, reducing overhead while maintaining the security and stability of RHEL. https://en.wikipedia.org/wiki/Red_Hat_Enterprise_Linux_Atomic_Host

Red Hat Fuse is an open-source integration platform that enables enterprises to connect applications, data, and devices in hybrid environments. Integrated with RHEL, Fuse supports a wide range of integration patterns and simplifies building and maintaining complex application networks. https://en.wikipedia.org/wiki/Red_Hat_Fuse

RHEL Realtime is a variant of RHEL designed for industries requiring low-latency, real-time performance. It provides deterministic response times, which is critical for applications in telecommunications, financial trading, and other industries where predictable system behavior is essential. https://access.redhat.com/products/red-hat-enterprise-linux-add-ons/real-time

RHEL for SAP is a version of RHEL optimized for running SAP workloads. It includes performance enhancements, resource management, and support for SAP HANA, ensuring that RHEL provides a stable and reliable platform for mission-critical SAP deployments. https://access.redhat.com/solutions/rhel-sap

Red Hat JBoss Enterprise Application Platform (JBoss EAP) is an open-source Java application server integrated with RHEL to provide a scalable, enterprise-grade platform for developing and deploying Java applications. It supports Java EE standards and is optimized for cloud and container environments. https://en.wikipedia.org/wiki/WildFly

Red Hat Enterprise Linux Developer Workstation is a version of RHEL designed for developers, offering development tools and utilities optimized for software creation. It provides an environment for building and testing applications while maintaining compatibility with enterprise RHEL systems. https://developers.redhat.com/products/rhel/download

Red Hat Software Collections is a set of additional software packages for RHEL that includes newer versions of programming languages, databases, and development tools not included in the base distribution. It allows developers to use the latest technologies while maintaining the stability of the core system. https://access.redhat.com/products/softwarecollections

Red Hat Insights for Vulnerability is a feature of Red Hat Insights that provides real-time analysis of security vulnerabilities in RHEL systems. It helps administrators identify, prioritize, and remediate vulnerabilities, ensuring that their systems remain secure and compliant with industry standards. https://access.redhat.com/products/red-hat-insights

RHEL Live Kernel Patching allows administrators to apply critical security patches to the Linux kernel without rebooting the system. This feature is essential for minimizing downtime and ensuring continuous uptime in production environments, especially for mission-critical applications. https://access.redhat.com/solutions/2206511

Red Hat Performance Co-Pilot (PCP) is a performance monitoring and analysis framework integrated into RHEL that provides real-time and historical data on system performance. It allows administrators to track metrics such as CPU usage, memory utilization, and network activity, helping optimize system performance. https://en.wikipedia.org/wiki/Performance_Co-Pilot

RHEL Kernel Care is an alternative service to Live Kernel Patching that automates the process of patching the kernel without requiring a reboot. It ensures that critical security updates are applied promptly, reducing the risk of vulnerabilities while maintaining system availability. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/managing_monitoring_and_updating_the_kernel/updating-the-kernel_on_red-hat-enterprise-linux

Red Hat Universal Base Image (UBI) is a freely redistributable container image based on RHEL, designed for building, running, and distributing containerized applications. It provides access to the same certified software packages as RHEL, ensuring compatibility and security for containerized environments. https://developers.redhat.com/products/rhel/ubi

Red Hat OpenStack Platform is a cloud computing platform integrated with RHEL that enables organizations to build and manage private and public clouds. It provides Infrastructure-as-a-Service (IaaS) capabilities, supporting the deployment of virtual machines, storage, and networking resources at scale. https://en.wikipedia.org/wiki/Red_Hat_OpenStack_Platform

RHEL Identity Management (IdM) includes certificate management features that provide secure, centralized control over issuing and managing digital certificates for encryption and authentication across the enterprise. This capability is critical for maintaining secure communications and data integrity. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/security_hardening/identity-management-certificates-overview_security-hardening

Red Hat Developer Studio is an integrated development environment (IDE) designed for RHEL users, providing tools for building, testing, and deploying Java and web-based applications. It integrates seamlessly with other Red Hat products, including JBoss and OpenShift. https://developers.redhat.com/products/devstudio/overview

Red Hat Subscription Asset Manager (SAM) is a tool for managing and tracking subscriptions across a RHEL deployment. It provides visibility into how many subscriptions are in use, helping organizations manage compliance and ensure that they have the necessary entitlements to receive support and updates. https://access.redhat.com/products/red-hat-subscription-management

RHEL Modular Repository is a repository structure in RHEL that allows users to select specific versions of software modules. This modularity provides more control over the software lifecycle, enabling users to run different versions of software on the same system, helping manage compatibility across environments. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/managing-software/introducing-the-modular-software-repository_managing-software

• Description: A Linux distribution developed by Red Hat for the commercial market, widely used in enterprise environments.
• Documentation: s://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/

• Description: The primary package management tool for installing, updating, and managing packages in RHEL.
• Documentation: s://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/managing_software_with_yum/index

• Description: The next-generation version of YUM, providing faster and more consistent package management.
• Documentation: s://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/performing_basic_system_management_tasks/assembly_managing-packages-with-dnf_performing-basic-system-management-tasks

• Description: A security architecture for RHEL that provides a mechanism for supporting access control security policies.
• Documentation: s://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/using_selinux/index

• Description: The system and service manager for Linux, used in RHEL to bootstrap the user space and manage system processes after booting.
• Documentation: s://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_basic_system_settings/using-systemd_configuring-basic-system-settings

• Description: A web-based interface for managing Linux servers, making it easy to administer RHEL servers via a web browser.
• Documentation: s://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/managing_systems_using_the_rhel_8_web_console/index

• Description: A powerful package management system used by RHEL for installing, updating, and managing software packages.
• Documentation: s://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/managing_monitoring_and_updating_the_kernel/working-with-package-managers_managing-monitoring-and-updating-the-kernel

• Description: The tooling and processes used to register RHEL systems and manage subscriptions.
• Documentation: s://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_and_managing_subscriptions/index

• Description: The core component of the operating system, managing the system's resources and the communication between hardware and software components.
• Documentation: s://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/managing_monitoring_and_updating_the_kernel/index

• Description: A device mapper framework that provides logical volume management for the Linux kernel, used in RHEL for flexible disk storage management.
• Documentation: s://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_and_managing_logical_volumes/index

• Description: The default dynamic firewall manager for RHEL, offering firewall capabilities for controlling access to network services.
• Documentation: s://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_and_managing_firewalls/index

• Description: The installation program used by RHEL, offering a graphical user interface for installing the operating system.
• Documentation: s://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/performing_an_advanced_rhel_installation/index

• Description: The default desktop environment provided by RHEL, offering a graphical user interface for interacting with the operating system.
• Documentation: s://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/using_the_desktop_environment_in_r hel_8/index

• Description: A protocol used for securely logging into and executing commands on remote RHEL servers.
• Documentation: s://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/securing_networks/using-ssh_securing-networks

• Description: A distributed file system protocol allowing a user on a client computer to access files over a network in a manner similar to how local storage is accessed.
• Documentation: s://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_basic_system_settings/assembly_accessing-file-systems_configuring-basic-system-settings

• Description: Software that enables RHEL to interact with Microsoft Windows systems, sharing files and printers across a network.
• Documentation: s://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_basic_system_settings/assembly_managing-file-servers_configuring-basic-system-settings

• Description: A virtualization module in the Linux kernel that allows the kernel to function as a hypervisor, managing multiple virtual machines (VMs).
• Documentation: s://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_and_managing_virtualization/index

• Description: Lightweight, standalone, executable software packages that include everything needed to run a piece of software, including the code, runtime, system tools, libraries, and settings.
• Documentation: s://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/building_running_and_managing_containers/index

• Description: A daemonless container engine for developing, managing, and running OCI Containers on your RHEL system.
• Documentation: s://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/building_running_and_managing_containers/assembly_using-the-container-tools-api_building-running-and-managing-containers

… (The list can be extended with additional RHEL concepts following the same format) …

Note: The provided URLs direct to the RHEL 8 documentation as an example. For specific RHEL versions or more detailed and specific information about each concept, please refer to the Red Hat Access documentation site and utilize the search feature.

This format offers a structured way to summarize key RHEL concepts, guiding readers to the official documentation for more in-depth exploration. Given the comprehensive and evolving nature of RHEL's documentation, consulting the official Red Hat documentation directly will ensure access to the most current and comprehensive information.

• Windows commands

• Issue 7 XCU: Shell & Utilities
• Issue 6 XCU: Shell & Utilities
• Issue 5 XCU: Commands & Utilities

Linux Commands (ls, cd, pwd, cp, mv, rm, mkdir, rmdir, touch, cat, less, head, tail, grep, find, chmod, chown, chgrp, tar, gzip, gunzip, df, du, ps, top, kill, man, ssh, scp, rsync, vim, nano, sed, awk, ping, ifconfig, netstat, route, traceroute, dig), Linux Fundamentals, Linux Inventor: Linus Torvalds says “Linux sucks | Linux just sucks less.”, Linux Best Practices - Linux Anti-Patterns, Linux kernel, Linux commands-Linux Shells-Linux CLI-GNU-Linux GUI-X11, Linux DevOps-Linux development-Linux system programming-Bash-zsh-Linux API, Linux package managers, Linux configuration management (Ansible on Linux, Chef on Linux, Puppet on Linux, PowerShell on Linux), Linux Distros (RHEL-Rocky Linux-CentOS (CentOS Stream)-Oracle Linux-Fedora, Ubuntu-Debian-Linux Mint-Raspberry Pi OS-Kali Linux-Tails, openSUSE - SUSE Linux Enterprise Server (SLES), Arch Linux-Manjaro Linux, Alpine Linux-BusyBox - Slackware - Android-Chrome OS); UNIX-UNIX Distros (FreeBSD-OpenBSD, BSD, macOS), Linux networking, Linux storage, Linux secrets, Linux security (Linux IAM-LDAP-Linux Firewall-Linux Proxy), Linux docs, Linux GitHub, Linux Containers, Linux VM, Linux on AWS, Linux on Azure, Linux on GCP, Linux on Windows (WSL), Linux on IBM, Linux on Mainframe (Linux on IBM Z mainframe - Linux for System z - IBM LinuxONE), Embedded Linux, Linus IoT-Linux on Raspberry Pi, LinuxOps-Linux sysadmin, systemd-userland-kernel space-POSIX-SUS-Linux filesystem-Linux architecture, Linux books-UNIX books, Linux courses, Linux Foundation, Linux history, Linux philosophy, Linux adoption, Linux Glossary - Glossaire de Linux - French, Linux topics (navbar_linux and navbar_unix - see also navbar_fedora, navbar_rhel, navbar_centos, navbar_debian, navbar_ubuntu, navbar_linux_mint, navbar_freebsd, navbar_opensuse, navbar_manjaro, navbar_kali_linux, navbar_nixos, navbar_alpine_linux, navbar_tails_linux, navbar_slackware, navbar_rocky_linux, navbar_arch_linux, navbar_oracle_linux)

Fair Use Sources:

• RHEL on DuckDuckGo
• RHEL on GitHub
• RHEL on O'Reilly
• RHEL on Stackoverflow
• RHEL on Reddit
• RHEL on YouTube
• RHEL for Archive Access for Fair Use Preservation, quoting, paraphrasing, excerpting and/or commenting upon