Grep with filenames

Sometimes you want grep to tell you what files have a pattern within a directory.  Here is how to do it:


grep -H JAVA_HOME=/  /usr/local/terracotta/bin/* /usr/local/terracotta/platform/bin/*

/usr/local/terracotta/bin/start-tc-server.sh:export JAVA_HOME=/usr/java/jdk1.6.0_21/
/usr/local/bin/stop-tc-server.sh:export JAVA_HOME=/usr/java/jdk1.6.0_21/
/usr/local/bin/tim-get.sh:export JAVA_HOME=/usr/java/jdk1.6.0_21/
/usr/local/platform/bin/make-boot-jar.sh:export JAVA_HOME=/usr/java/jdk1.6.0_21/


Enjoy!

Killing zombie processes

Kill those persistent and annoying zombie processes.


ps -e -o ppid,stat | grep Z | cut -d" " -f2 | xargs kill -9

Tested on Fedora for accuracy.  

Find the PID number with nothing else

Use this combination to find a PID number without anything else in the output:

ps -ef | grep -v grep | grep ssh | cut -d" " -f3
3012

Enjoy that kungfu knife-kick combo.

Grep entire directories

To find a phrase that could be found somewhere in the current directory, use the command:

grep -r -i searchString ./

For example:

grep -r -i splunk /etc

This would search the entire /etc filesystem for any line with the word "splunk" located therein. Another way to do this would be the command:

find / -type f -print | xargs grep splunk

It works well with HP-UX and other Unixes.