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Full Discussion: [Solved] How to remove / kill defunct processess?
Operating Systems HP-UX [Solved] How to remove / kill defunct processess? Post 302411070 by jgt on Wednesday 7th of April 2010 01:26:44 PM
Old 04-07-2010
This issue seems to be caused by users closing Windows terminal emulation sessions without first signing off, (clicking on the X before exiting the session.)
On SCO systems, these "ghost" sessions tend to consume all the available CPU trying to re-connect.
I wrote the following script to deal with this issue, but it should be used with caution.
On SCO systems telnet sessions are named ttypnn, on HP-UX it appears they are named pts/nnn.

Code:
#!/bin/ksh
if [ $# -eq 0 ]
then
echo Usage is delete.ghosts  Y or N
exit 1
fi
ps -leaf |grep ttyp >/tmp/ps.list
who >/tmp/user.list
LIST=; export LIST
separator=" "
while read a tty c 
do
LIST=$LIST$separator$tty
separator=" |"
done </tmp/user.list
grep -v "?" </tmp/ps.list |grep -v root |\
grep -E -v "$LIST" >/tmp/ghost.list
while read a b user pid e f
do
if [ $1 = Y ]
then
echo for real $user $pid
echo kill -9 $pid
#kill -9 $pid
else
echo test run $user $pid
echo kill -9 $pid
fi
done </tmp/ghost.list
#

 

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LEARN ABOUT DEBIAN

rescan-scsi-bus

RESCAN-SCSI-BUS.SH(8)					      System Manager's Manual					     RESCAN-SCSI-BUS.SH(8)

NAME

       rescan-scsi-bus.sh - rescan the SCSI bus.

SYNOPSIS

       rescan-scsi-bus.sh [ -l ] [ -w ] [ -c ] [ -r ] [ host...  ]

DESCRIPTION

       rescan-scsi-bus.sh is a program that is used to rescan the SCSI bus using the SCSI add-single-device feature of the Linux SCSI layer.

OPTIONS

       -l     Activates scanning for LUNs 0 .. 7 (default: 0).

       -L NUM Activates scanning for LUNs 0 .. LUN (default: 0).

       --luns=LIST
	      Scan only LUNs in LIST.

       -w     Enables scanning for device IDs 0 .. 15 (default: 0 .. 7).

       --ids=LIST
	      Scan only device IDs in LIST.

       -i, --issue-lip
	      Issue a FibreChannel LIP reset (default: disabled).

       -r, --remove
	      Enables removing of devices (default: disabled).

       --forceremove
	      Remove and readd every device (dangerous).

       -c     Enables scanning of channels 0 1 (default: 0).

       --channels=LIST
	      Scan only channels in LIST.

       host, --hosts=LIST
	      If host adapters are given, only these are scanned (default: all).

       --nooptscan
	      Don't stop looking for LUNs if 0 is not found.

       --color
	      Use coloured prefixes OLD/NEW/DEL.

       LIST is a comma separated list of single values and ranges (no spaces allowed), e.g. 0,2-3,8,10-15.

AUTHOR

       rescan-scsi-bus.sh was written by Kurt Garloff <garloff@suse.de>.

COPYRIGHT

       This  program  is free software. You can use it under the terms of the GNU GPL (General Public License) Version 2 (or any later version, at
       your option).  Note, that the GNU GPL implies, that there is NO WARRANTY at all.  Full text of the GPL can be found  in	/usr/share/common-
       licenses/GPL file.

AVAILABILITY

       rescan-scsi-bus.sh is available from
       http://www.garloff.de/kurt/linux/scsidev/

								    March 1998						     RESCAN-SCSI-BUS.SH(8)
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