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Tag: centos

Fix “Error: rpmdb open failed” on CentOS or Amazon Linux 2

Posted on April 20, 2020April 24, 2021 by Ercan

Yesterday, I have started to test some services on running Amazon Linux 2 powered by Amazon Web Services cloud. For some reason, my package manager yum is broken and when I started to update my yum database, I’ve got an error about rpmdb open failed. You can see my error below. If you are running…

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Find the exact size of certain files in Linux via terminal

Posted on November 15, 2019April 24, 2021 by Ercan

One day, there may be a lot of files in more than one extension in the macOS, Linux or server you use, and you may be wondering about the size of these files or just want to see the size of the files with the corresponding extension for a specific study. The other day, the…

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Disable SELinux on CentOS 7 or CentOS 8

Posted on November 8, 2019April 24, 2021 by Ercan

This tutorial shows you how you can disable SELinux (Security-Enhanced Linux) on your CentOS server. The CentOS version should be 7 or 8. The version does not matter. What is SELinux? SELinux is a security mechanism directly controlling by the kernel. It allows administrators and users more control over access controls on access based SELinux…

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