Index[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Z] ! (exclamation mark), history expansion # (hash), shell script comments - (dash), command options -exec primary with grep command with xargs command -H option -L option -ld option -P option -p option copy command mkdir command -path option -R option [See recursion, basics] -r option [See recursion, basics] . (period), hidden files .nanorc file / (forward slash), using in pathnames ' ' (quote-quote), cursor flips ? (question mark), pattern-matching operator [ command [[ keyword ~ (tilde) absolute pathname shorthand expansion |