Difference between revisions of "Object3D"

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(linux tips)
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=== linux tips ===
 
=== 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" ]
 +
then
 +
  newgrp object3d
 +
  exit
 +
fi
 +
 +
 +
* 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
  
 
=== python tips ===
 
=== python tips ===

Revision as of 21:32, 31 December 2008

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" ] then

 newgrp object3d
 exit

fi


  • 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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