Useful Unix Commands

=== Find Class within Jar file ===

To find a class within a binary jar file

 for i in `ls *.jar`; do (jar tf $i  grep '{classname}' ) && echo $i;done   

If you want to search within all subdirectories use this

 for i in `find . -name ‘*.jar’`; do (jar tf $i  grep '{CLASSNAME}' ) && echo $i;done 

=== Find string within file of name ===

find . -name *.xml -exec grep  {} \;

example

find . -name web.xml -exec grep -i servlet {} \;

=== Grep within zip file without unzipping it ===

gzip -c -d {file}.gz | grep {string}

Example

gzip -c -d admin_access.log0001_4Dec08_0147.gz | grep -i adq | wc -l

=== Find process using the port ===

The easy way to do this is using netstat passing the port number

netstat -a | grep 61014

If that does not help getting a pid, run this line below

for i in `ls /proc`; do pfiles $i | grep AF_INET | grep 61014 ; done

Output:

pfiles: permission denied: 12363
sockname: AF_INET 0.0.0.0 port: 61014
pfiles: permission denied: 12384

this shows the process appearing in between pids 12363 and 12384 uses that port.