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  1. or download this
    #!/usr/bin/perl
use warnings;
...
close INFILE;
kill -9 => $pid;
  2. or download this
    # ./test.pl
This is parent 29307
This is child pid 29309
#
  3. or download this
    # ps -ef|grep urandom
root 29309 1 0 00:53 pts/2 00:00:00 sh -c cat /dev/urandom >
testfile
root 29310 29309 99 00:53 pts/2 00:00:12 cat /dev/urandom