Linux Command Directory

Linux in a Nutshell

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.


pidof [options] programs

Display the process IDs of the listed program or programs. pidof is actually a symbolic link to killall5.


-o pids

Omit all processes with the specified process IDs.


Return a single process ID.


Also return process IDs of shells running the named scripts.

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