chmod 644 — Permissions Explained
What does chmod 644 mean? See the rwx permission matrix, ls -l output and symbolic form for mode 644 — free chmod calculator.
ReadWriteExecute
Owner (u)
Group (g)
Others (o)
ls -l
rw-r--r--chmod
chmod u=rw,g=r,o=r fileAbout chmod 644 — Permissions Explained
chmod 644 sets rw-r--r--: the owner can read and write; group and others can only read. It's the standard mode for web files, config files and anything that should be world-readable but owner-editable.
The checkbox matrix is preset to 644 — toggle any permission to see the octal, symbolic and ls -l forms update together. Runs entirely in your browser.