chmod 644

Owner can read and write; everyone else can only read.

Octal Symbolic

File Directory

Permissions
	Read	Write	Execute
Owner	owner read	owner write	owner execute
Group	group read	group write	group execute
Others	others read	others write	others execute

Special bits: setuid setgid sticky

Path

Calculated on your device.

What chmod 644 means

644 (rw-r--r--) is the default for ordinary files: documents, HTML, CSS, images and configuration that isn't secret. You can edit the file; other users and services — such as a web server — can read it but not change it.

Use it for website files, READMEs and most source code. Don't use it for files containing passwords or keys, which other users could read; use 600 instead.

Adjust the checkboxes above to see how a different mode compares, or go back to the chmod calculator.

Other common values

755 — Directories and programs
777 — Everyone can do everything
600 — Private file
700 — Private directory
400 — Read-only, owner only
775 — Shared team directory
664 — Group-editable file
2775 — Shared directory with setgid
1777 — Shared temp directory (sticky)