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Revision as of 21:33, 31 December 2008 by Haosu (talk | contribs) (linux tips)

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linux tips

  • Changing Default permissions when creating a new directory

umask u=rwx,g=rwx,o=

  • set default group

newgrp groupname

 Remark: this command will start a nested shell. If you want to use the command in a startup script like in .bashrc, to avoid infinite loop, you should put it in an "if" expression like this: 
 if [ `id -gn` != "object3d" ] 
   newgrp object3d

  • Change default shell:

chsh -s /bin/bash haosu

I/O Redirection: if you want to redirect both standard out and standard error, you can use: 1>out 2>&1

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