Unix File Permissions

Reference Unix permission numbers, symbolic permissions, and common chmod modes like 644, 755, and 777.

How to read "change mode" chmod numbers:

Digits
1st digit: Owner
2nd digit: Group
3rd digit: Others

Permission values
Read = 4
Write = 2
Execute = 1

Permission Values

8 permission values

Value	Symbolic	Binary	Meaning	Read	Write	Execute
0	---	000	No permissions	No	No	No
1	--x	001	Execute only	No	No	Yes
2	-w-	010	Write only	No	Yes	No
3	-wx	011	Write and execute	No	Yes	Yes
4	r--	100	Read only	Yes	No	No
5	r-x	101	Read and execute	Yes	No	Yes
6	rw-	110	Read and write	Yes	Yes	No
7	rwx	111	Read, write, and execute	Yes	Yes	Yes

Common Modes

7 common chmod modes

Mode	Symbolic	Owner	Group	Others	Common Use
644	rw-r--r--	Read/write	Read only	Read only	Regular public files, such as HTML, CSS, images, and config files.
600	rw-------	Read/write	None	None	Private files, secrets, SSH config, and sensitive local files.
755	rwxr-xr-x	Read/write/execute	Read/execute	Read/execute	Directories and executable scripts that others can access but not modify.
700	rwx------	Read/write/execute	None	None	Private directories and executable scripts only the owner should access.
664	rw-rw-r--	Read/write	Read/write	Read only	Shared group-writable files.
775	rwxrwxr-x	Read/write/execute	Read/write/execute	Read/execute	Shared group-writable directories and executable project folders.
777	rwxrwxrwx	Read/write/execute	Read/write/execute	Read/write/execute	Fully open permissions. Usually unsafe except for temporary/testing cases.

About this tool

Unix Permissions helps developers, sysadmins, content teams, and support agents reference Unix permission values, symbolic permissions, and common chmod modes. Use it during file handling, documentation, permission reviews, and upload troubleshooting when you need a focused result you can read, copy, or share without opening a heavier application.

Use cases

Use Unix Permissions while working on file handling when you need to reference Unix permission values, symbolic permissions, and common chmod modes.
Copy Unix Permissions output into tickets, docs, test notes, spreadsheets, or chat threads so teammates can verify the same result.
Keep Unix Permissions open as a repeatable browser utility for quick checks instead of building a one-off spreadsheet or script.

FAQ

What is Unix Permissions best used for?

Unix Permissions is best used when you need to reference Unix permission values, symbolic permissions, and common chmod modes in a fast, copy-friendly browser workflow.

Who benefits most from the Unix Permissions tool?

It is especially helpful for developers, sysadmins, content teams, and support agents who handle file handling, documentation, permission reviews, and upload troubleshooting, and need clear output without extra setup.

Can I use Unix Permissions results in documentation or bug reports?

Yes. The output is designed to be readable and easy to paste into issues, docs, QA notes, or team conversations.