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Chmod 660

Owner can read, write. Group can read, write. Others have no permissions.

Numeric Notation

660

Symbolic Notation

rw-rw----

Command

chmod 660 file

Permission Breakdown

Detailed view of permissions for each user category

Owner

✓ Read✓ Write✗ Execute

Group

✓ Read✓ Write✗ Execute

Others

✗ Read✗ Write✗ Execute

For Files

chmod 660 filename.txt

Changes permissions of a single file

chmod 660 *.txt

Changes permissions of all .txt files

After applying chmod 660, files will display as:

rw-rw---- filename.txt

For Directories

chmod 660 dirname

Changes permissions of a directory

chmod -R 660 dirname

Recursively changes all files and subdirectories

After applying chmod 660, directories will display as:

drw-rw---- dirname

Common Use Cases for Chmod 660

Shared Reading

Files that need to be readable by multiple users or groups.

Restricted Access

Files with restricted access, not available to public users.

General Purpose

This permission set is useful when you need owner read, write access.

Related Chmod Codes

Explore similar permission configurations

Try the Interactive Calculator

Experiment with different permission combinations

Understanding Chmod 660

The chmod 660 command sets specific file permissions in Linux and Unix systems. This permission configuration owner can read, write. group can read, write. others have no permissions.

In the numeric notation 660, each digit represents the permission level for different user categories. The symbolic representation rw-rw---- provides a visual way to understand these permissions, where 'r' means read, 'w' means write, 'x' means execute, and '-' means no permission.

When you execute chmod 660 filename, you're modifying the file's access control list to match this specific permission pattern. This is essential for maintaining proper security and access control in multi-user environments.