Chmod 600 Linux Permissions (rw-------)
chmod 600 sets permissions to rw-------: Owner: Read and write (6), Group: No access (0), Others: No access (0). Only the file owner can read and write to this file. All other system users have no permissions whatsoever.
Read and write
No access
No access
Security Notice
Strict requirement for SSH private keys (~/.ssh/id_rsa), API keys, and sensitive database password files.
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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 600 in Linux?
Run the command: chmod 600 <filename>. For directories and their contents recursively, run: chmod -R 600 <directory>.
Is chmod 600 secure?
Strict requirement for SSH private keys (~/.ssh/id_rsa), API keys, and sensitive database password files.
What does the symbolic code rw------- represent?
The 9 characters represent 3 triplets: Owner (rw-), Group (---), and Others (---). 'r' is read (4), 'w' is write (2), 'x' is execute (1), and '-' is disabled (0).