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] [Y] !ls command !pwd command # (hash mark) command prompt $ (dollar sign) command prompt * (asterisk) pattern-matching character . (single period) directory 2nd .. (double period) directory 2nd 3rd /begin command /bin directory /etc/fstab file 2nd 3rd 4th 5th 6th /etc/ftpusers file ? (question mark) pattern-matching character [a-b] (range) pattern-matching character [AaBbCc] (list) pattern-matching character {text} command 2nd 3rd 4th 5th 6th {} command | (vertical bar) pipes 2nd 3rd 4th 5th ~ (tilde) character 2nd |