Difference between revisions of "Linux General"

Revision as of 02:13, 9 March 2011

Tips -N- Tricks

grep -i 'SearchStringHere' ~/.bash_history

tail -f /path/to/log/filename

or

Filter a continuous log for a specific entry

tail -f /path/to/log/filename | grep -i 'FilterStringHere'

grep -v '#' file.conf > newfile.conf

To disable all swap space in Linux use this command:

swapoff -a

To re-enable it use this command:

swapon -a

su <SOME_OTHER_USER>

or Run as a user that doesn't have shell access (Like the 'www' account).

su -m www -c "run some command here"

Note: The -c option is used to run a single command.

RedHat based distributions use RPM's short for Redhat Package Manager. To view a list of installed RPMS:

rpm -qa

To look for a specific installed package:

rpm -qa | grep 'package_name'

To view the contents of a RPM

rpm -qpil /path/to/package.rpm

Common Sqitches: -i Install
-U Upgrade
-v verbose
-h Display Hash mark progress bar
-e erase
--force forces an erase or upgrade

@@ Line 20: / Line 20: @@
 To re-enable it use this command:
   swapon -a
 == Run a command as a different User ==
   su <SOME_OTHER_USER>
 or Run as a user that doesn't have shell access (Like the 'www' account).
-  su -m www -c 'run some command here'
+  su -m www -c "run some command here"
+Note: The -c option is used to run a single command.