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env: update

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Chuancong Gao 2016-01-05 14:24:11 -08:00
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pages/common/env.md
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@ -1,19 +1,23 @@
# env # 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` `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}}` `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}}` `env -u {{variable}} {{program}}`
- Set a variable and run a program - Set a variable and run a program:
`env {{variable}}={{value}} {{program}}` `env {{variable}}={{value}} {{program}}`