Symbolic Notation
-rwxrwx---(as shown by ls -l)-rwxrwx---
typeownergroupother
Permission Matrix
| Read(4) | Write(2) | Execute(1) | Octal | |
|---|---|---|---|---|
| Owner | r | w | x | 7 |
| Group | r | w | x | 7 |
| Other | - | - | - | 0 |
What Does chmod 770 Mean?
Owner can read, write, execute. Group can read, write, execute. Others can no access.
$ chmod 770 filenameCommon Use Cases
Owner and group have full access; others have none. Shared project directories where only team members should operate.
Security Notes
Secure for team-only directories. Others are completely locked out. Double-check group membership regularly.
Interactive Tool
Need to calculate a custom permission? Use the interactive permissions calculator to toggle individual bits and get instant results.
Unix Permissions Calculator