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Full Discussion: Help! Zombies
Top Forums UNIX for Dummies Questions & Answers Help! Zombies Post 302863011 by methyl on Friday 11th of October 2013 07:09:11 PM
Old 10-11-2013
Zombie processes which are not cleaned up by unix within a few hours can really only be cleared by a reboot.

The odd few zomboes will be caused by untidy disconnects from clients. If you get large numbers, suspect a hardware or software fault. After replacing a failed hot-pull tape drive it could still be necessary to reboot the computer to clear zombie processes left with incomplete I/O from the original fault. I have seen faulty client/server software which accumulated zombies at an alarming rate.
 

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REBOOT(8)						      System Manager's Manual							 REBOOT(8)

NAME
reboot - reboot the system immediately SYNOPSIS
reboot [-f] DESCRIPTION
Reboot can be used to reboot the system after installing a new kernel. It does not inform the users, but does log it's actions in /usr/adm/wtmp and /usr/adm/authlog. The system is then rebooted with the reboot(2) systemcall. If the -f flag is not given then all processes are sent terminate signals to give them a chance to die peacefully before the reboot() call. If the wtmp file exists, reboot logs itself as if it were a shutdown. This is done to prevent last(1) from talking about system-crashes. Reboot is registered as is in the authlog file. Reboot can only be executed by the super-user. Any other caller will be refused, either by reboot(8) or by reboot(2). SEE ALSO
reboot(2), shutdown(8), halt(8), boot(8). BUGS
The error message's given by reboot are not always useful. There are several routines that can fail, but which are not fatal for the pro- gram. AUTHOR
Edvard Tuinder (v892231@si.hhs.NL) REBOOT(8)
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