Simple one-liner to list all your network ports negotiated speed:

netstat -v | egrep "Media | \(en"

The Migration Upgrade option is missing when trying to perform an AIX upgrade.

Check the version of each copy of the boot logical volume (hd5).  If any copy has the target AIX version or higher, this will cause the migration option to be unavailable.

If you don’t have access to the web page of the Management Module, or you’re too lazy to walk to a PC, you can ssh into the management module and do it from the CLI.

Normally NTP slews the time if it’s off by less than 128ms, and steps the time if it’s over that. This can cause some serious problems with Oracle (especially 9i+). The -x option in xntpd forces all time changes to be slewed instead of stepped. You’ll want to run ntpdate if your time isn’t pretty close to being accurate already then make these changes:

stopsrc -s xntpd
chssys -s xntpd -a "-x"
startsrc -s xntpd

If there are problems getting MQSeries to start, try clearing out the IPCS semaphors used by MQ. With MQ down, run:

ipcs -s |egrep mqm |awk '{print $2}' |xargs -i -n1 ipcrm -s
ipcs -m |egrep mqm |awk '{print $2}' |xargs -i -n1 ipcrm -m

#!/bin/sh
#########
# wtmptrim.sh - Trim old entrues off of the wtmp file so it doesn't grow
# forever.
#
# V1.0 - 12/07/00
#

/usr/sbin/acct/fwtmp < /var/adm/wtmp | tail -20000 > /tmp/wtmp.ascii.new

if [ "$?" != 0 ]
then
	echo "$0" "Error extracting wtmp file"
	exit
fi
/usr/sbin/acct/fwtmp -ic < /tmp/wtmp.ascii.new > /var/adm/wtmp
if [ "$?" != 0 ]
then
	echo "$0" "Error recompressing wtmp file"
	exit
else
	rm /tmp/wtmp.ascii.new
fi

Sometimes after an AIX upgrade, reload, or new system installation, you’ll get “The X-Server can not be started on display:0:” on the ASCII console. To fix it Delete the bottom line beginning with :0 in the /usr/dt/config/Xservers file.

If you need to poweroff or poweron an LPAR remotely, you can do it with command lines.