env: update

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Chuancong Gao 2016-01-05 14:24:11 -08:00
parent e63ff72f30
commit d92791b287

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# env
> Show the environment or run a program in a modified environment
> Show the environment or run a program in a modified environment.
- Show the environment
- Show the environment:
`env`
- Clear the environment and run a program
- 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
- Remove variable from the environment and run a program:
`env -u {{variable}} {{program}}`
- Set a variable and run a program
- Set a variable and run a program:
`env {{variable}}={{value}} {{program}}`