Linux Command Library
commands
Commands
basic
Basic
tips
Tips

env

run a program in a modified environment

- Show the environment:
env

- Run a program. Often used in scripts after the shebang (#!) for looking up the path to the program:
env [program]

- Clear the environment and run a program:
env -i [program]

- Remove variable from the environment and run a program:
env -u [variable] [program]

- Set a variable and run a program:
env [variable]=[value] [program]

env [,OPTION/]... [,-/] [,NAME=VALUE/]... [,COMMAND /[,ARG/]...]

Set each NAME to VALUE in the environment and run COMMAND.

Mandatory arguments to long options are mandatory for short options too.

-i, --ignore-environment
start with an empty environment
-0, --null
end each output line with NUL, not newline
-u, --unset=,NAME/
remove variable from the environment
--help
display this help and exit
--version
output version information and exit

A mere - implies -i. If no COMMAND, print the resulting environment.

Written by Richard Mlynarik and David MacKenzie.

GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report env translation bugs to <http://translationproject.org/team/>

Copyright © 2016 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

Full documentation at: <http://www.gnu.org/software/coreutils/env> or available locally via: info '(coreutils) env invocation'

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