Chmod 644 Linux Permissions (rw-r--r--)
chmod 644 sets permissions to rw-r--r--: Owner: Read, write (6), Group: Read only (4), Others: Read only (4). The owner can read and write to the file, while group members and public users can only read it. Execution is disallowed for all.
Read, write
Read only
Read only
Security Notice
Recommended secure default for web documents (.html, .css, images), text files, and config assets.
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Linux Permissions Breakdown
| Octal | Symbolic | Purpose |
|---|---|---|
| 755 | rwxr-xr-x | Standard for directories and scripts |
| 644 | rw-r--r-- | Standard for regular files |
| 777 | rwxrwxrwx | Full permissions for everyone (insecure) |
| 700 | rwx------ | Private owner directory |
| 600 | rw------- | Private secret file |
| 666 | rw-rw-rw- | Read and write for all |
| 400 | r-------- | Read-only for owner |
FAQ
How do I set permissions to 644 in Linux?
Run the command: chmod 644 <filename>. For directories and their contents recursively, run: chmod -R 644 <directory>.
Is chmod 644 secure?
Recommended secure default for web documents (.html, .css, images), text files, and config assets.
What does the symbolic code rw-r--r-- represent?
The 9 characters represent 3 triplets: Owner (rw-), Group (r--), and Others (r--). 'r' is read (4), 'w' is write (2), 'x' is execute (1), and '-' is disabled (0).