Chmod Page

chmod



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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.


{{wp>chmod}}



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



Return to PowerShell Commands, Windows Commands

= Windows Equivalent of chmod Command

=

chmod Equivalent Command in Windows

In English, Summarize this topic in 1 paragraphs. Make the Wikipedia or other references URLs as raw URLs. 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. You MUST put double square brackets around ALL computer buzzwords, product names, or jargon or technical words.

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

In English, Summarize this topic in 1 paragraphs. Make the Wikipedia or other references URLs as raw URLs. 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. You MUST put double square brackets around ALL computer buzzwords, product names, or jargon or technical words.


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

In English, Summarize this topic in 1 paragraphs. Make the Wikipedia or other references URLs as raw URLs. 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. You MUST put double square brackets around ALL computer buzzwords, product names, or jargon or technical words.

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


Return to chmod, Automation with Python


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.

Basic chmod Automation Example



Here's a simple example of using `os.chmod` in a Python script to change file permissions:

```python
import os
import stat

# File path
file_path = 'example.txt'

# Setting the permission to 'read and write' for the owner, 'read' for the group, and 'read' for others
os.chmod(file_path, stat.S_IRUSR | stat.S_IWUSR | stat.S_IRGRP | stat.S_IROTH)
```

This script sets the permissions of `example.txt` to allow the owner to read and write, while the group and others can only read the file.

Advanced chmod Automation Using Loops



For scenarios where multiple files need their permissions updated, loops can be utilized to automate the process efficiently:

```python
import os
import stat

# List of files
files = ['file1.txt', 'file2.txt', 'file3.txt']

# Set all files to 'read and execute' for everyone
for file in files:
os.chmod(file, stat.S_IREAD | stat.S_IEXEC)
```

This loop iterates over a list of files, applying read and execute permissions to each, simplifying the task of handling multiple files.

Error Handling in chmod Automation



Error handling is crucial when automating file permission changes to avoid script crashes and ensure all files are processed successfully. Here’s an example incorporating basic error handling:

```python
import os
import stat

# File path
file_path = 'nonexistent.txt'

try:
os.chmod(file_path, stat.S_IRWXU) # Full permissions to the owner
except FileNotFoundError:
print(f"Error: {file_path} does not exist")
```

This script attempts to change permissions on a file that might not exist, and gracefully handles the error by catching the `FileNotFoundError` and printing an error message.

By automating `chmod` with Python, developers and system administrators can significantly streamline the management of file permissions, making their workflows more efficient and less prone to human error. For more detailed information, reference the official Python documentation at https://docs.python.org/3/library/os.html#os.chmod and the Unix manual pages for `chmod`.




----


Research It More


Research:
* ddg>chmod on DuckDuckGo
* google>chmod on Google.com
* oreilly>chmod on O'Reilly
* github>chmod on GitHub

* linuxfoundation>chmod on linuxfoundation.org
* linuxq>chmod on wiki.linuxquestions.org
* distrowatch>chmod on distrowatch.com
* askubuntu>chmod on askubuntu.com
* ubuntuwiki>chmod on help.ubuntu.com
* debian>chmod on debian.org
* debianpkg>chmod on packages.debian.org
* debianwiki>chmod on wiki.debian.org
* redhat>chmod on developers.redhat.com
* fedora>chmod on fedoraproject.org
* fedoradocs>chmod on docs.fedoraproject.org
* archwiki>chmod on wiki.archlinux.org
* snap>chmod on snapcraft.io
* linux>chmod on linux.org
* man>chmod on man.cx
* freebsd>chmod on forums.freebsd.org
* shell>chmod on shellhacks.com
* linuxhint>chmod on linuxhint.com

* javatpoint>chmod on javatpoint.com
* w3schools>chmod on w3schools.com
* tutorialspoint>chmod on tutorialspoint.com
* freecode>chmod on FreeCodeCamp.org

* aws>chmod on AWS Docs
* k8s>chmod on Kubernetes.io
* ms>chmod on docs.microsoft.com
* gcp>chmod on GCP Docs
* ibm>chmod on IBM Docs
* redhat>chmod on Red Hat Docs
* oracle>chmod on Oracle Docs

* youtube>chmod on YouTube
* reddit>chmod on Reddit
* scholar>chmod on scholar.google.com
* stackoverflow>chmod on Stackoverflow
* quora>chmod on Quora
* dzone>chmod on Dzone
* hackernoon>chmod on Hacker Noon
* infoq>chmod on InfoQ.com


Fair Use Sources


Fair Use Sources:
* archive>Linux for Archive Access for Fair Use Preservation, quoting, paraphrasing, excerpting and/or commenting upon
* The Borg


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