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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.



env

env [option] [variable=value ... ] [command]

Display the current environment or, if an environment variable is specified, set it to a new value and display the modified environment. If command is specified, execute it under the modified environment.

Options

-, -i, --ignore-environment

Ignore current environment entirely.

-u name, --unset name

Unset the specified variable.

--help

Print help message and then exit.

--version

Print version information and then exit.