chmod
NAME
chmod – change file modes or Access Control Lists
SYNOPSIS
chmod [-fv] [-R [-H -L -P]] mode file …
chmod [-fv] [-R [-H -L -P]] [-a +a =a] ACE file …
chmod [-fhv] [-R [-H -L -P]] [-E] file …
chmod [-fhv] [-R [-H -L -P]] [-N] file …
EXAMPLES
chmod 644 /home/looker/.ssh/id_rsa.pub