Security: Safe
chmod 444 — r--r--r--
Read-only access for EVERYONE (r--r--r--), including the file owner.
Live Interactive Permission Matrix
Linux chmod Calculator & Generator
Octal Value
444
Symbolic
r--r--r--
Quick Presets:
Owner (User)
The file creator
Group
Team or service account
Public (Others)
All other system users
Security Assessment
Status: Safe
Target:
chmod 444 deploy.shchmod -R 444 /var/www/deploy.shInteractive Permission Matrix (rwx)
| Role | Read (r - 4) | Write (w - 2) | Execute (x - 1) | Octal Total |
|---|---|---|---|---|
| Owner (User) | 4 | |||
| Group | 4 | |||
| Others (Public) | 4 |
Copyable chmod 444 Commands
Apply to Single File
chmod 444 target_fileApply Recursively to Directory
chmod -R 444 /path/to/folderOnly Apply to Directories (find)
find /path/to/folder -type d -exec chmod 444 {} +Only Apply to Files (find)
find /path/to/folder -type f -exec chmod 444 {} +Recommended Real-World Use Cases
- •Read-only archives and audit logs
- •System-wide public certificates (`ca-bundle.crt`)
- •License files and immutable legal notices
Security Consideration
chmod 444 locks down a file against any accidental modifications or deletions. Even the owner must explicitly alter permissions before editing.
Frequently Asked Questions
chmod 444 Questions & Answers
Common questions regarding Linux permissions, security risks, and recursive chmod commands.
Read-only access for EVERYONE (r--r--r--), including the file owner. In symbolic notation, this is represented as "r--r--r--".