Category Archives: Enterprise Linux

Everything about RedHat, Centos, ScientificLinux …..

Cool new tools

Just back from my vacation I learned two cool new tools on the first day. Of course both are in EPEL and Fedora. The Silver Search: ag $STRING is an alternative to grep -ir $STING . But a lot of … Continue reading

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lmsensors for Monitoring a Hetzner EX41 with nct6775 on Centos7

Hi, I recently rented a new Hetzner Box to replace my old. I moved from EX40 to EX41 and saving even some money every month :-). Every thing went smooth, but the sensors did not work. I had to use … Continue reading

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We need 64bit, everywhere!

Just bought a new 8TB disk drive. Following my standard procedures I run a badblock -w against the disk as burn in test. Running on Fedora 20 on x86_64 I was surprised to see this: badblocks -v -v -w /dev/sdf … Continue reading

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my T-Shirt

root is god selinux is blasphemy

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Bachelor Thesis: Centralized and structured log file analysis with Open Source and Free Software tools

After a lot of hard work I finished my bachelor thesis end of August and gave my colloquium end of September. Because of all the other stuff going on in my life I just have now time to upload my … Continue reading

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uptime madness, or why do you need to reboot just because you replace the harddiscs?

I just got an new HP Microserver for a customer. I only had two 500GB disc available and installed Centos onto it. But now the 4* 3TB discs have arrived and I need to move everything from the 2 small … Continue reading

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Thank you Seth Vidal, my first ansible playbook

I was shocked when I heard about Seth Vidal’s death. Of course I use yum daily, but it brought tears to my eyes, when I was reading my¬† “my TODO List after a install” and realized that Seth was one … Continue reading

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my TODO List after a install

I had to reinstall a couple of machines recently and I had to do the same thing more then once. So I wrote a script,and for my own future self I post it here, as reference. sed -e ‘s:ONBOOT=no:ONBOOT=yes:’ -i … Continue reading

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Be carefull when updating from RHEL6.1 to RHEL6.4

If you have a RHEL6.1 and try to update to RHEL6.4, you will get some strange errors, about missing libraries. The reason is that ldconfig will not run anymore, because /etc/ld.so.conf.d/kernel-2.6.32-* sepcifies hwcap 0 till RHEL6.1 and RHEL 6.2 and … Continue reading

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Memorymangement is harder than it is known.

After I thought I understood memory manager after all, this comes along. I have a behavior I can’t understand or explain. Let’s see if anyone can solve the puzzle. You have a machine, lets say with 8GB Ram. You only … Continue reading

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