![[image of the Head of a GNU]](/graphics/gnu-head-sm.jpg)
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GNU Rush |
Restricted User Shell |
Sergey Poznyakoff |
GNU Rush – a restricted user shell (split by node): 
The following variables can be used to refer to various parts of the user request:
| Variable | Expansion |
|---|---|
| $user | User name |
| $group | Name of the user’s principal group |
| $uid | UID |
| $gid | GID |
| $home | User’s home directory |
| $gecos | User’s GECOS field |
| $program | Executable program name |
| $command | Entire command line |
| $# | Number of arguments in ‘$command’ |
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