How To check zombie processes

How To check zombie processes:

# ps aux | awk '{ print $8 " " $2 }' | grep -w Z
Output:
Z 4104
Z 5320
Z 2945

How do I kill zombie process?

You cannot kill zombies, as they are already dead. But if you have too many zombies then kill parent process or restart service.
You can kill zombie process using PID obtained from any one of the above command. For example kill zombie proces having PID 4104:

# kill -9 4104