Chmod 770 Explained
Chmod 770: full access for owner and group, no access for others. Secure shared directory for team collaboration.
Permission
770
rwxrwx---
chmod 770 filename
Permission Breakdown
| Role | Read (4) | Write (2) | Execute (1) | Octal | Meaning |
|---|---|---|---|---|---|
| Owner | r | w | x | 7 | read, write, execute |
| Group | r | w | x | 7 | read, write, execute |
| Others | - | - | - | 0 | no permissions |
Visual Permission Grid
Detailed Explanation
The permission 770 gives full access to both the owner and the group, while completely excluding other users.
Octal breakdown:
- 7 (Owner): read (4) + write (2) + execute (1) = full access
- 7 (Group): read (4) + write (2) + execute (1) = full access
- 0 (Others): no access
In symbolic notation this is rwxrwx---. The owner and group members have unrestricted access to the file or directory. Other users on the system cannot read, modify, or traverse it.
This permission is ideal for team directories that contain proprietary or confidential information. It provides the same collaborative access as 775 but adds the security of blocking all access from users outside the group. System administrators often use this for department-specific shared folders, project repositories with sensitive code, and internal application directories.
Use Case
Used for confidential shared project directories, internal application folders, and any shared resource that should not be visible to users outside the team's group.