env

Show the environment or 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}}