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Chmod Calculator

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Generates numeric or symbolic Linux file permission codes based on user/group/other read/write/execute settings.

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter User Read, User Write, User Execute, Group Read, Group Write, Group Execute, Other Read, Other Write, and Other Execute in the units shown.

Step 2

Read Symbolic Code (Other), Symbolic Code (Group), Symbolic Code (User), Other Permissions (Read/Write/Execute), Group Permissions (Read/Write/Execute), User Permissions (Read/Write/Execute), Symbolic Code (Combined), and Numeric Code in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

Example calculations

See the inputs and their calculated results.

Read/Write for User, Read for Group, Read for Other

User Read: Yes; User Write: Yes; User Execute: No; Group Read: Yes; Group Write: No; Group Execute: No; Other Read: Yes; Other Write: No; Other Execute: No

Symbolic Code (Other): r; Symbolic Code (Group): r; Symbolic Code (User): r; Other Permissions (Read/Write/Execute): 4; Group Permissions (Read/Write/Execute): 4; User Permissions (Read/Write/Execute): 6; Symbolic Code (Combined): u:r,g:r,o:r; Numeric Code: 644

Read/Write/Execute for User, Read/Execute for Group, Read/Execute for Other

User Read: Yes; User Write: Yes; User Execute: Yes; Group Read: Yes; Group Write: No; Group Execute: Yes; Other Read: Yes; Other Write: No; Other Execute: Yes

Symbolic Code (Other): r; Symbolic Code (Group): r; Symbolic Code (User): r; Other Permissions (Read/Write/Execute): 5; Group Permissions (Read/Write/Execute): 5; User Permissions (Read/Write/Execute): 7; Symbolic Code (Combined): u:r,g:r,o:r; Numeric Code: 755

Read/Write for User, No Permissions for Group and Other

User Read: Yes; User Write: Yes; User Execute: No; Group Read: No; Group Write: No; Group Execute: No; Other Read: No; Other Write: No; Other Execute: No

Symbolic Code (Other): ---; Symbolic Code (Group): ---; Symbolic Code (User): r; Other Permissions (Read/Write/Execute): 0; Group Permissions (Read/Write/Execute): 0; User Permissions (Read/Write/Execute): 6; Symbolic Code (Combined): u:r,g:---,o:---; Numeric Code: 600

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