This directory of Linux commands is from Linux in a Nutshell,
5th Edition. Click on any of the 687 commands below to get a
description and list of available options. All links in the
command summaries point to the online version of the book on
Safari Bookshelf. Buy it now, or read it online on Safari
Bookshelf. tr [options] [string1 [string2] ] Translate
characters. Copy standard input to standard output, substituting
characters from string1 to string2, or deleting characters in
string1. Complement characters in string1 with respect to ASCII
001-377. Delete characters in string1 from output. Squeeze out
repeated output characters in string2. Truncate string1 to the
length of string2 before translating. Print help message and
then exit. Print the version number and then exit. Include
brackets ([ ] ) where shown. Ctrl-L (form feed) Ctrl-M (carriage
return) Ctrl-K (vertical tab) Character with octal value nnn All
characters in the range char1 through char2. If char1 does not
sort before char2, produce an error.