The Virtualization Cookbook for SLES 10 SP2 - z/VM - IBM

► View your order with the swapon -s command:
# swapon -s
Filename Type Size Used Priority
/dev/dasda2 partition 524296 0 -1
/dev/dasdb1 partition 262132 0 -2
/dev/dasdc1 partition 524276 0 -3
This shows that the minidisk swap space will be used before the VDISK. As VDISKs are
in-memory, they should be first in the priority, from smallest to largest.
► Make a backup of the /etc/fstab file:
# cd /etc
# cp fstab fstab.orig
► Modify the order by moving the line in /etc/fstab. with the minidisk swap space below
the lines with VDISK swap spaces:
# vi fstab
...
/dev/disk/by-path/ccw-0.0.0300-part1 swap swap defaults 0 0
/dev/disk/by-path/ccw-0.0.0301-part1 swap swap defaults 0 0
/dev/disk/by-path/ccw-0.0.0100-part2 swap swap defaults 0 0
...
After a reboot, the minidisk swap space should come back with the lowest priority.
7.2.11 Setting the system to logoff when Linux is shut down
When Linux is shut down, the default is for the virtual machine to remain logged on even
though it is not running an operating system. It is more convenient for the user ID to be
logged off, both at z/VM SHUTDOWN time and for getting a refreshed 3270 emulator session. To
do this, perform the following steps:
► Edit the file /etc/rc.d/rc.local and add two lines at the end as follows:
# cd /etc/rc.d
# vi rc.local
#!/bin/sh
#
# This script will be executed *after* all the other init scripts.
# You can put your own initialization stuff in here if you don't
# want to do the full Sys V style init stuff.
touch /var/lock/subsys/local
chshut halt vmcmd logoff
chshut poff vmcmd logoff
The z/VM user ID should now be logged off when you halt or power off Linux.
7.2.12 Rebooting the system
You should now reboot the system to test the changes:
# reboot
Broadcast message from root@gpok223.endicott.ibm.com
(/dev/pts/0) at 7:27 ...
The system is going down for reboot NOW!
After your system comes back in a couple of minutes, start a new SSH session to the cloner.
126 The Virtualization Cookbook for RHEL 6