it_tips:shelltricks
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it_tips:shelltricks [2019/02/06 17:52] (current) florido created |
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| + | ====== Various useful shell tricks ====== | ||
| + | ===== How do I switch to a different group I belong to? ===== | ||
| + | |||
| + | In unix inspired operating systems one can see whose groups they belong to by using the ''id'' command: | ||
| + | |||
| + | <code:bash> | ||
| + | [pflorido@pptest-iridium ~]$ id | ||
| + | uid=6312(pflorido) gid=34000(clusterusers) groups=34000(clusterusers),6300(hep),6500(npusers),46300(ppguests) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 | ||
| + | [pflorido@pptest-iridium ~]$ touch testgrp | ||
| + | [pflorido@pptest-iridium ~]$ ls -l testgrp | ||
| + | -rw-r-----. 1 pflorido clusterusers 0 6 feb 18.09 testgrp | ||
| + | </code> | ||
| + | |||
| + | The ''gid'' field shows the //primary group//, that is, the first group you belong to and with which one's files will be created. | ||
| + | |||
| + | If one wants to switch to another primary group so that the files are created with a different group name, one can use ''newgrp'': | ||
| + | |||
| + | <code:bash> | ||
| + | [pflorido@pptest-iridium ~]$ newgrp hep | ||
| + | uid=6312(pflorido) gid=6300(hep) groups=6300(hep),6500(npusers),34000(clusterusers),46300(ppguests) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023bash-4.1$ touch testnewgrp | ||
| + | bash-4.1$ ls -l testnewgrp | ||
| + | -rw-r-----. 1 pflorido hep 0 6 feb 18.27 testnewgrp | ||
| + | </code> | ||
| + | |||
| + | Note that group switching starts another login shell, so you can use ''exit'' to go back to your previous group. | ||
| + | |||
| + | <code:bash> | ||
| + | bash-4.1$ exit | ||
| + | exit | ||
| + | [pflorido@pptest-iridium ~]$ id | ||
| + | uid=6312(pflorido) gid=34000(clusterusers) groups=34000(clusterusers),6300(hep),6500(npusers),46300(ppguests) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 | ||
| + | </code> | ||
it_tips/shelltricks.txt · Last modified: 2019/02/06 17:52 by florido
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