acl_extended_file - Linux
Overview
acl_extended_file is a Linux command used to manage extended access control lists (ACLs) associated with a particular file. ACLs provide granular control over who can access a file and what operations they can perform. This command allows for the manipulation of both user and group-based ACLs.
Syntax
acl_extended_file [-n] [-q] [-d] [-c] [-s] [-t] [-w] [-v] [-h] [--help] [--version] <file>
Options/Flags
- -n, –no-access
Hide access ACL entries. - -q, –quiet
Suppress all warnings. - -d, –default
Show the default ACL entries. - -c, –canonical
Show the canonical ACL entries. - -s, –stats
Show statistics about the ACLs. - -t, –text
Show the ACLs in text format. - -w, –write
Write the ACLs back to the file. - -v, –verbose
Enable verbose mode. - -h, –help
Display help information. - –version
Display version information.
Examples
Display the ACLs for a file:
acl_extended_file myfile
Add an entry to the ACL:
acl_extended_file -w myfile -a user:alice:rwx
Remove an entry from the ACL:
acl_extended_file -w myfile -d user:bob
Common Issues
- Permission denied: Ensure the user has sufficient permissions to modify the ACLs.
- Invalid ACL format: Verify that the ACLs are specified in the correct format.
- File not found: Check that the specified file exists.
Integration
acl_extended_file can be used in conjunction with other commands, such as chmod and chown, to manage file permissions. For example:
chmod -R 744 mydir
acl_extended_file -R -w mydir -a group:mygroup:r
This command chain sets the permissions on the directory mydir
and its subdirectories to 744 and adds read permissions for the group mygroup
to all files within mydir
.
Related Commands
- chmod: Change file permissions.
- chown: Change file ownership.
- getfacl: Get file ACLs.
- setfacl: Set file ACLs.