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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.


pathchk [option] filenames

Determine validity and portability of filenames. Specifically, determine if all directories within the path are searchable and if the length of the filenames is acceptable.



Print a help message and then exit.

-p, --portability

Check portability for all POSIX systems.


Print version information and then exit.

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