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add env command

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litblaky 2014-04-08 22:47:38 +08:00
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# env
> Show the environment or run a program in a modified environment
- Show the environment
`env`
- 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}}`