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}}