chmod 600 — Permissions Explained
What does chmod 600 mean? See the rwx permission matrix, ls -l output and symbolic form for mode 600 — free chmod calculator.
ReadWriteExecute
Owner (u)
Group (g)
Others (o)
ls -l
rw-------chmod
chmod u=rw,g=,o= fileAbout chmod 600 — Permissions Explained
chmod 600 sets rw-------: only the owner can read or write; group and others get nothing. It's the required mode for SSH private keys and the right choice for secrets, tokens and credential files — ssh refuses keys that are more permissive.
The checkbox matrix is preset to 600 — toggle any permission to see the octal, symbolic and ls -l forms update together. Runs entirely in your browser.