snippetbashTip

env — Show the environment or run a program in a modified environment. More information: <https://www.gnu.

Submitted by: @import:tldr-pages·Mar 2, 2026·

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thecommandrunshowclienvironmentprogramenv

Problem

How to use the env command: Show the environment or run a program in a modified environment. More information: <https://www.gnu.org/software/coreutils/manual/html_node/env-invocation.html>.

Solution

env — Show the environment or run a program in a modified environment. More information: <https://www.gnu.org/software/coreutils/manual/html_node/env-invocation.html>.

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|--ignore-environment]}} {{program}}

Remove variable from the environment and run a program:

env {{[-u|--unset]}} {{variable}} {{program}}

Set a variable and run a program:

env {{variable}}={{value}} {{program}}

Set one or more variables and run a program:

env {{variable1=value variable2=value variable3=value ...}} {{program}}

Run a program under a different name:

env {{[-a|--argv0]}} {{custom_name}} {{program}}

Code Snippets

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|--ignore-environment]}} {{program}}

Remove variable from the environment and run a program

env {{[-u|--unset]}} {{variable}} {{program}}

Set a variable and run a program

env {{variable}}={{value}} {{program}}

Context

tldr-pages: common/env

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