Category Archives: centos

CONFIG_RETPOLINE=y error on CentOS 7

We need to update our systems. We don’t do it regularly, but when requested by the authority, and this time they requested it due to Specter & Meltdown. So there I am trying to get my rpm for the newest … Continue reading

Posted in bits, centos, filesystems, GPFS, hardware, linux, programming | Leave a comment

Sharemouse, a Keyboard Video Mouse sharing solution for Windows and macOS

I have now 3 computers, real ones. And 4 monitors. But OK, let’s say I need them. What I don’t need is to have 3 keyboards and 3 mice. So I looked for a KVM (Keyboard-Video-Mouse) to make my life … Continue reading

Posted in centos, hardware, linux, mac, osx, software, windows | Leave a comment

Speed test with iperf on CentOS 7

We’re now having more than one GPFS client hooked up to a 10 GB line. The fact we have a 10 GB network available is not, unfortunately, meaning that we can have that speed, so we need some tool to … Continue reading

Posted in bits, centos, GPFS, linux, software, yum | Leave a comment

/usr/lib64/ version `GLIBCXX_3.4.20′ not found CentOS 7

The GLIBCXX error is a recurrent one. It happens usually when I try to use new codeĀ just compiled on an old system. The old system is my CentOS 7. I got it prevously, for example installing relion 2.1. But I … Continue reading

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Add module path on CentOS 7

If you installed software modules on CentOS 7, you know that the module definitions are stored on /usr/share/Modules/modulefiles/ by default. We want to change that, so that we can store the modules on the place we want, or add different … Continue reading

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Add a CentOS 7 node to a GPFS cluster

We want to have all the clients of our storage added as native GPFS clients. I showed before some problems that I experienced with an already joined GPFS client. Everybody’s lazy, so I will suppose you already compiled the GPFS … Continue reading

Posted in bash, bits, centos, filesystems, GPFS, linux, slurm, software | Leave a comment

Docker usage cheatsheet

My docker usage cheat sheet isĀ  a simplified version on this fantastic one on GitHub. I followed the structure I used for my apparently popular Slurm user cheatsheet. What it does Command List active dockers docker ps List all dockers … Continue reading

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