Linux Command Directory
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.
unexpand [options] [files]
Convert strings of initial whitespace, consisting of at least two spaces and/or tabs, to tabs. Read from standard input if given no file or a file named -.
Convert all, not just leading, strings of spaces and tabs.
Convert only leading spaces and tabs. Overrides -a.
nums is a comma-separated list of integers that specify the placement of tab stops. If a single integer is provided, the tab stops are set to every integer spaces. By default, tab stops are eight spaces apart. This option implies -a.
Print help message and then exit.
Print the version number and then exit.