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

chmod

La commande chmod est utilisée dans les systèmes Unix et Linux pour modifier les permissions d'accès à un fichier ou un répertoire. Elle permet de spécifier les autorisations de lecture, d'écriture et d'exécution pour le propriétaire du fichier, le groupe auquel il appartient et les autres utilisateurs. Cette commande est essentielle pour contrôler l'accès aux fichiers et répertoires dans un système d'exploitation Unix, offrant aux utilisateurs un moyen flexible de définir qui peut lire, écrire ou exécuter un fichier donné.

French Wikipedia: https://fr.wikipedia.org/wiki/Chmod

The chmod command is used in Unix and Linux systems to modify the access permissions of a file or directory. It allows specifying the permissions for reading, writing, and executing for the file owner, the group it belongs to, and other users. This command is essential for controlling access to files and directories in a Unix operating system, providing users with a flexible way to define who can read, write, or execute a given file.

Snippet from Wikipedia: Chmod: chmod is a shell command for changing access permissions and special mode flags of files (including special files such as directories). The name is short for change mode where mode refers to the permissions and flags collectively.
The command originated in AT&T Unix version 1 and was exclusive to Unix and Unix-like operating systems until it was ported to other operating systems such as Windows (in UnxUtils) and IBM i.
In Unix and Unix-like operating systems, a system call with the same name as the command, chmod(), provides access to the underlying access control data. The command exposes the capabilities of the system call to a shell user.
As the need for enhanced file-system permissions grew, access-control lists were added to many file systems to augment the modes controlled via chmod.
The implementation of chmod bundled in GNU coreutils was written by David MacKenzie and Jim Meyering.

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In French, Give code or command line examples:

Voici quelques exemples d'utilisation de la commande **chmod** en français :

1. Accorder les permissions de lecture, écriture et exécution au propriétaire du fichier : ``` chmod u+rwx fichier ```

2. Révoquer les permissions d'écriture pour le groupe du fichier : ``` chmod g-w fichier ```

3. Accorder uniquement les permissions de lecture aux autres utilisateurs : ``` chmod o+r fichier ```

4. Modifier les permissions de manière récursive pour un répertoire et son contenu : ``` chmod -R u+rwX repertoire ```

5. Utiliser la notation octale pour définir les permissions (par exemple, 755 pour rwxr-xr-x) : ``` chmod 755 fichier ```

Detail

chmod

Answering in French, Summarize this Linux command in 5 paragraphs. IMMEDIATELY after the French term, list the equivalent English term. Mention its date of invention/creation and inventor/creator, date of introduction/founding. Make the French Wikipedia or other references URLs as raw URLs. You MUST put double square brackets around each programming term, technology, product, computer buzzword or jargon or technical words. Put a section heading for each paragraph. Section headings must start and end with 2 equals signs. Do not put double square brackets around words in section headings.

chmod Equivalent Command in Windows

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Windows Equivalent of chmod Command

chmod Equivalent Command in Windows

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In Windows, the equivalent command to `chmod` in Unix-like systems is `icacls`, which stands for “Integrity Control Access Control Lists.” This command is used to view and modify access control lists (ACLs) for files and directories, allowing users to change permissions and security settings. `icacls` enables users to grant or revoke permissions for specific users or groups, set inheritance options, and manipulate various security attributes of files and directories. More information about `icacls` can be found on the Microsoft documentation page.

PowerShell Equivalent of chmod Command

chmod Equivalent Command in PowerShell

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In PowerShell, the equivalent command to `chmod` in Unix-like systems is `Set-ACL`, which stands for “Set Access Control List.” This cmdlet is used to modify the security descriptor of a file or directory, allowing users to change permissions and access rights. `Set-ACL` enables users to specify a new set of permissions, add or remove permissions for specific users or groups, and configure inheritance options. It provides fine-grained control over access control settings, similar to `chmod` in Unix. More information about `Set-ACL` can be found on the Microsoft documentation page: https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.security/set-acl?view=powershell-7.4

IBM z/OS and IBM Mainframe Equivalent of chmod Command

chmod Equivalent Command in IBM z/OS and IBM Mainframe Environment

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In the IBM z/OS and IBM Mainframe environment, the equivalent command to `chmod` in Unix-like systems is `RACF`, which stands for “Resource Access Control Facility.” RACF is an IBM security product that provides mainframe access control and mainframe resource protection capabilities for z/OS systems. With RACF, administrators can define and manage access control lists (ACLs) for mainframe datasets, programs, and system resources. This allows them to specify who can access specific resources and what actions they are allowed to perform. RACF plays a crucial role in enforcing security policies and ensuring the integrity of data and applications on IBM mainframe systems. More information about RACF can be found on the IBM documentation (https://www.ibm.com/docs/en/zos/2.3.0?topic=services-about-ibm-resource-access-control-facility) page.

chmod Command Automation with Python

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chmod Automation with Python

Introduction to chmod Automation with Python

Automation with Python offers a reliable way to manage file permissions on Unix-based systems, including Linux and macOS. The command `chmod` (change mode) is used to set or modify the access permissions of file system objects. Automating this process using Python is particularly useful for administrators and developers who need to manage file permissions programmatically. This can streamline setup processes, ensure security configurations, and handle permission changes during software deployments.

Understanding chmod Command

The `chmod` command in Unix allows users to set the read, write, and execute permissions for the owner, group, and others. These permissions are essential for controlling access to files and directories. Permissions can be expressed either numerically (e.g., 755) or symbolically (e.g., u+rwx). A numerical permission like 755 gives the owner full rights, while the group and others can read and execute. Symbolic permissions like u+rwx add read, write, and execute permissions to the owner.

Python os and stat Modules

Python's `os` and `stat` modules are instrumental in manipulating file permissions. The `os.chmod` function takes a file path and a mode and applies the permissions, while the `stat` module provides constants to use with `os.chmod` for setting permissions symbolically. Using these modules allows for dynamic and scriptable file permission management, which can be integrated into larger Python applications or scripts.