Author Archives: Jens Kuehnel

Centos 7 to 8 Update

WARNING DANGEROUS! Disclaimer: This is not supported and it can breaks you computer or delete your data. You have been warned. I take no responsibility if it breaks. Double check that your backup is working. Past My main server was … Continue reading

Posted in Enterprise Linux, Fedora, Linux | 2 Comments

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

Posted in Enterprise Linux, Fedora, Linux, Uncategorized | Tagged | 1 Comment

FreeNAS and check_mk

Hi, I’m setting up two FreeNAS Server for Backup and Archiving and I really like FreeNAS 11. Thank good I didn’t have time to update it to FreeNAS Coral. 🙂 But I’m using check_mk for monitoring and I would like … Continue reading

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qemu/kvm libvirt and trim with Fedora 25

Hi, after more then 10 years of using VMWare Workstation (Starting with VMWare Workstation 5). I’m in the process of moving to KVM/libvirt, but I want to use qcow2 with trim support. I’m using Fedora 25 with virt-manager to create … 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

Posted in Enterprise Linux, Fedora, Linux | Tagged | 2 Comments

yum vs. dnf

Sorry for the long silence. I will try to post more often from now on. I playing around with dnf, which is the package manager that should replace yum in the future and had some very nice insight. [root@mysystem ~]# … Continue reading

Posted in Fedora, Linux, Uncategorized | Tagged | 3 Comments

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

Posted in Enterprise Linux, Fedora, Linux, logs | Tagged , | 1 Comment

note to self: Fedora minimal Installation and virt-manager

If you need to install virt-manager on a Fedora/Red Hat minimal installation, add the following packages: yum install xorg-x11-fonts-Type1 xorg-x11-xauth libvirt-daemon-kvm libvirt virt-manager qemu-kvm qemu-kvm-tools

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Very simple time sync sollution for Satellite

Hi, because I don’t want to create a Google Account, here my comment to the blogpost Time on Computers, NTP, Certificates, etc from Ivan Makfinsky. The simplest method is to put the following line into the pre script: rdate SATELLITESERVER hwlock … Continue reading

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