Security: Safe
chmod 555 — r-xr-xr-x
Read and execute for EVERYONE (r-xr-xr-x). NO ONE can write or modify.
Live Interactive Permission Matrix
Linux chmod Calculator & Generator
Octal Value
555
Symbolic
r-xr-xr-x
Quick Presets:
Owner (User)
The file creator
Group
Team or service account
Public (Others)
All other system users
Security Assessment
Status: Elevated
Target:
chmod 555 deploy.shchmod -R 555 /var/www/deploy.shInteractive Permission Matrix (rwx)
| Role | Read (r - 4) | Write (w - 2) | Execute (x - 1) | Octal Total |
|---|---|---|---|---|
| Owner (User) | 5 | |||
| Group | 5 | |||
| Others (Public) | 5 |
Copyable chmod 555 Commands
Apply to Single File
chmod 555 target_fileApply Recursively to Directory
chmod -R 555 /path/to/folderOnly Apply to Directories (find)
find /path/to/folder -type d -exec chmod 555 {} +Only Apply to Files (find)
find /path/to/folder -type f -exec chmod 555 {} +Recommended Real-World Use Cases
- •Read-only shared CD-ROM/NFS mount points
- •Protected administrative tools and read-only binaries
Security Consideration
chmod 555 creates immutable executable binaries and read-only searchable directories that cannot be altered or overwritten by any regular user.
Frequently Asked Questions
chmod 555 Questions & Answers
Common questions regarding Linux permissions, security risks, and recursive chmod commands.
Read and execute for EVERYONE (r-xr-xr-x). NO ONE can write or modify. In symbolic notation, this is represented as "r-xr-xr-x".