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Category Archives: Linux
Checking SUSE bootability on POWER
This little script checks the GRUB boot image for the VG/LV/file string pointing to the correct place, e.g. /boot/grub/grub.cfg. This works on SUSE / SLES on POWER. # SLES bootability monitor## Henrik Morsing 1.0 24-FEB-2023 Initial ver=1.0 [[ “${1}” == … Continue reading
Starting tactic script for CPU allocation calculations on POWER9/10
Based on Earl Jew’s presentation on the 6th of October 2022, “Simplest starting tactic for Power10 AIX exploitation V1.2″. Excellent IBM POWER VUG materials can be found here: https://ibm.ent.box.com/s/6hn2orvig4r2peu6e39owmp07ewyyf4x And the meeting presentation replay here: https://ibm.ent.box.com/s/5atsp26sxup1ob04c3urbkiovj8epbax This is an analytic … Continue reading
Posted in AIX, IBM POWER, Linux, Performance tuning, Scripting
Tagged IBM, LPAR, POWER, Processor entitlement, script, smt, Tuning, virtual CPU
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Growing SAN LUN on Linux
This procedure works on SLES 15, should work on RHEL, but not yet tested. This script is for growing SAN LUNs running via multipath on Linux. Makes it look like AIX and just as easy! Growing SAN LUNs in Linux … Continue reading
Roundcube php7.4 after Debian Bullseye upgrade
I upgraded Debian Buster to Bullseye carefully following the procedure. Part of the procedure includes removing old or no longer used packages, which I think deleted something that was actually needed. Not to worry, I managed to fix it. I … Continue reading
NDB – Network Block Device setup
I have been trying to setup NBD to present a shared storage device for me to play around with Xen live mobility. NBD is not tricky, but the documentation, both official and Google, is flawed and confusing. To get a … Continue reading
VI changing to lowercase
I don’t know why I can never remember this one, but here it is for reference: :%s/.*/\L& .* = Match line& = What was matched No need for /g as .* already matches the line, and .* if faster than … Continue reading
Finding SQL query in TCP stream
Just a little one to remember, as I use this occasionally, with this tcpdump you can read SQL queries, rsh commands etc: tcpdump -i en0 -s 0 -l -w – dst port 3306 | strings
DHCPv6 and finding DUID
As you probably know if you are using IPv6 at home, Privacy Extentions are a pain, Apple devices are a pain, “smart” phones are a pain, etc. The problem is that privacy extentions makes it impossible to set-up as firewall … Continue reading