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] [Y] [Z] # sign comments root prompt symbol $ (dollar sign) function as regular expression setting prompt to appear on separate line && (ampersands) * (asterisk) function as regular expression as placeholder 2nd . (dot) function as regular expression hiding files starting with specifying currentdirectorywith find command / (root directory) '' (single quotes) > (greater than symbol) ? (question mark) [ ] (square brackets) \ (backslash) ^ (caret) Ctrl in pico function as regular expression ^[^[ (Esc sequence) | (pipe symbol) ~ (tilde) |