Linux Commands

[[Category:Linux]]
= Linux Commands (Practical Use) =

== Kill Processes Found by <code>ps</code> ==
e.g.) Killing flash

* Get the running flash processes
 $ ps aux | grep flash 
<pre>
username    5488  3.4  0.7 732108 114580 ?       Sl   04:28   0:13 /path/to/app --type=plugin --plugin-path=/usr/lib/flashplugin-installer/libflashplayer.so
username    5591  1.3  0.2 410888 33128 ?        Sl   04:35   0:00 /usr/lib/firefox/plugin-container /usr/lib/flashplugin-installer/libflashplayer.so
username    5602  0.0  0.0  14812   912 pts/3    S+   04:35   0:00 grep --color=auto flash
</pre>

* Exclude the process to grep flash
 $ ps aux | grep flash | grep -v grep 
<pre>
username    5488  3.4  0.7 732108 114580 ?       Sl   04:28   0:13 /path/to/app --type=plugin --plugin-path=/usr/lib/flashplugin-installer/libflashplayer.so
username    5591  1.3  0.2 410888 33128 ?        Sl   04:35   0:00 /usr/lib/firefox/plugin-container /usr/lib/flashplugin-installer/libflashplayer.so
</pre>

* Get only the process IDs
 $ ps aux | grep flash | grep -v grep | awk '{ print $2; }' 
<pre>
5488
5591
</pre>

* Use the process IDs to kill the processes
 $ kill -9 `ps aux | grep flash | grep -v grep | awk '{ print $2; }'`

* Use alias
 $ vim ~/.bash_aliases 
<pre>
alias psflash='ps aux | grep flash | grep -v grep | awk "{ print \$2; }"' 
alias killflash='kill -9 `ps aux | grep flash | grep -v grep | awk "{ print \\$2; }"`' 
# OR
# alias killflash="kill -9 \`ps aux | grep flash | grep -v grep | awk '{ print \$2; }'\`" 
</pre>