How to clean zombie process under Linux __linux

Often found in the regular detection of the script kill, the process will be zombie inside, unable to clean. You can refer to the following method to clean up:

Processes that have the following environments:

#ps aux |grep monitorast.pl
Root 3962 0.0 1.5 5652 3840? Ss 10:13 0:00 /usr/bin/perl-w/root/script/monitorast.pl
Root 5135 0.0 0.2 3920 740 pts/0 s+ 10:52 0:00 grep monitorast.pl

# kill-9 process status after 3962:

# PS aux |grep monitorast.pl
Root 3962 0.0 0.0 0 0? Zs 10:13 0:00 [monitorast.pl] <defunct>
Root 5196 0.0 0.2 3916 668 pts/0 r+ 10:52 0:00 grep monitorast.pl

Then you cannot use kill to purge, then you need to clean up the process from the call to kill

#ps AXJF

1 2616 2616 2616? -1 Ss 0 0:00 Crond
2616 3960 2616 2616? -1 S 0 0:00/_ Crond
3960 3962 3962 3962? -1 Zs 0 0:00/_ [monitorast.pl] <defunct>
3960 3970 2616 2616? -1 S 0:00/_/usr/sbin/sendmail-fcrondaemon-i-odi-oem-oi-t

Judging by this, the calling process does not affect other tasks on the system, so you can kill the parent process directly.

# kill-9 3960

# PS aux |grep monitorast.pl
Root 5364 0.0 0.2 3916 676 pts/0 r+ 10:58 0:00 grep monitorast.pl

Now you can see that it's not there anymore.