bash Cookbook

tr Escape Sequences

Table A-21. tr escape sequences

Sequence	Meaning
\ooo	Character with octal value ooo (1-3 octal digits)
\\	A backslash character (i.e., escapes the backslash itself)
\a	“Audible” bell, the ASCII BEL character (since "b" was taken for backspace)
\b	Backspace
\f	Form feed
\n	Newline
\r	Return
\t	Tab (sometimes called a horizontal tab)
\v	Vertical tab