Linux Permission Calculator - drwxr-xr-x

🔧 Permission Calculator

Paste ls -la permission string

Enter a permission string to see the parsed result

Enter numeric permission

Special Permission Bits

SUID(4) SGID(2) Sticky(1)

Enter numeric permission to see conversion

Enter symbolic permission

Enter symbolic permission to see conversion

Enter umask value

Default umask: 022

Default file permission: 644rw-r--r--

Default directory permission: 755rwxr-xr-x

📊 Permission Reference Table

Numeric	Symbolic	Permission	Common Use
777	rwxrwxrwx	All permissions for everyone	Temp dirs (not recommended)
755	rwxr-xr-x	Owner all, others read+exec	Directory/script default
700	rwx------	Owner only	Private directory
644	rw-r--r--	Owner rw, others read	File default
600	rw-------	Owner rw only	Private file (SSH keys)
400	r--------	Owner read only	Read-only config
4755	rwsr-xr-x	SUID + 755	passwd, privileged commands
1777	rwxrwxrwt	Sticky + 777	/tmp directory

How to Use Linux File Permission Calculator

The Linux File Permission Calculator supports 4 modes:

Parse ls Output
Paste the permission field from ls -la (e.g., drwxr-xr-x or -rw-r--r--) to automatically parse numeric, symbolic, and chmod command.
Numeric Mode
Enter numeric permissions (e.g., 755, 644) to convert to symbolic and ls format. Supports special bits (SUID/SGID/Sticky).
Symbolic Mode
Enter symbolic permissions (e.g., u=rwx,g=rx,o=r) to convert to numeric and ls format.
Umask Calculator
Enter a umask value to calculate default permissions for new files and directories.

❓ FAQ

What does drwxr-xr-x mean?

drwxr-xr-x represents a directory where the owner has read, write, and execute permissions (rwx), the group has read and execute (r-x), and others have read and execute (r-x). The numeric value is 755, the standard permission for directories.

What is umask and how is default permission calculated?

umask is a mask that controls default permissions for newly created files and directories in Linux. Default permission = base permission - umask. Files have a base of 666, directories 777. For example, with umask=022, new files get 666-022=644 (rw-r--r--) and new directories get 777-022=755 (rwxr-xr-x).

What are SUID, SGID, and Sticky Bit?

SUID (4000) makes a program run with the file owner's permissions, like the passwd command. SGID (2000) makes a program run with the file's group, and on directories new files inherit the directory's group. Sticky Bit (1000) only allows the file owner and root to delete files in a directory, commonly used on /tmp.

🐧 Linux File Permission Calculator