chmod 600

Only the owner can read and write. Nobody else has any access.

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 600 means

600 (rw-------) is for secrets: SSH private keys, .env files, API tokens, password stores and personal configuration. SSH refuses to use a private key that others can read, with the error "permissions are too open" — chmod 600 ~/.ssh/id_ed25519 fixes it.

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

Other common values

644 — Standard file
755 — Directories and programs
777 — Everyone can do everything
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)