Help for this page
#!/usr/bin/perl ... sleep(3); waitpid(-1, WNOHANG); }
$ ./check.pl process id: 4609 ... 06:29 4569 4569 Ss bash 00:12 4609 4609 S+ \_ /usr/bin/perl ./check.pl 00:00 4624 4609 R+ \_ ps Tf -o etime,pid,pgrp,stat,cmd