Difference between revisions of "Linux tips"
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* Changing Default permissions when creating a new directory | * Changing Default permissions when creating a new directory | ||
umask u=rwx,g=rwx,o= | umask u=rwx,g=rwx,o= | ||
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add umask in .bashrc in an "if" expression like to make rsync proper | add umask in .bashrc in an "if" expression like to make rsync proper | ||
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if you want to redirect both standard out and standard error, you can use: 1>out 2>&1, where out is a filename, 1 stands for | if you want to redirect both standard out and standard error, you can use: 1>out 2>&1, where out is a filename, 1 stands for | ||
STDOUT, and 2 for STDERR | STDOUT, and 2 for STDERR | ||
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| + | * sync data | ||
| + | rsync -avze ssh davinci:~/matlab-jc/ps/ ~/matlab_jc/ps/ | ||
Latest revision as of 18:10, 4 January 2009
- Changing Default permissions when creating a new directory
umask u=rwx,g=rwx,o=
add umask in .bashrc in an "if" expression like to make rsync proper
- 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, where out is a filename, 1 stands for STDOUT, and 2 for STDERR
- sync data
rsync -avze ssh davinci:~/matlab-jc/ps/ ~/matlab_jc/ps/
