Free online CHMOD permission calculator, supports Linux/Unix file permission conversion between numeric and symbolic representations, visual checkbox selection, real-time display of permission results and detailed explanations
755 (rwxr-xr-x): Owner has read, write and execute permissions, group and others have read and execute permissions.
This is the most common permission setting for directories and executable files, suitable for most web server website files and script files.
Intuitively set read/write/execute permissions through checkboxes
Real-time conversion between numeric and symbolic representation
One-click setting of common permissions like 755, 644 etc.
Detailed explanation of each permission's meaning and use cases
Modify permission settings to instantly update results
Completely free, no registration login required
In the permission settings table, check read, write, execute permissions for owner, group and others respectively. Results will update in real-time after checking.
View corresponding numeric representation (like 755) and symbolic representation (like rwxr-xr-x) in the permission result area, as well as detailed permission explanation.
Can also directly click common permission preset buttons to quickly set common permission configurations, like 755 (directories/executable files), 644 (regular files) etc.
Linux server file permission configuration
Website file directory permission settings
Script file execute permission configuration
Data file security permission settings
Minimum privilege principle configuration
Multi-user file sharing permissions
CHMOD is a command in Unix/Linux systems used to change file or directory access permissions. It stands for change mode. File permissions are divided into three user categories: Owner/User, Group, Others, each category has Read, Write, Execute three permissions.
777 (rwxrwxrwx): All users have read write execute permissions, lowest security, not recommended.
755 (rwxr-xr-x): Owner full control, others can read and execute, commonly used for executable files and directories.
644 (rw-r--r--): Owner can read write, others read only, standard permission for regular files.
600 (rw-------): Only owner can read write, others no permission, suitable for sensitive files like private keys.
For files: Read permission can view file content, write permission can modify file content, execute permission can run file (scripts/programs).
For directories: Read permission can list directory contents (ls), write permission can create/delete files in directory, execute permission can enter directory (cd) and access files inside.