server problems

  1. DevOps

    Tutorial How to fix GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed

    On centos 7, there are instances where you get the error Unable to register authentication agent: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: Cannot determine user of subject Error registering authentication agent: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: Cannot determine...
  2. DevOps

    Tutorial Fix rpmdb: Thread died in Berkeley DB library

    Symptoms If you see rpmdb errors during package management (during yum/rpm operations), like this: rpmdb: Thread/process 277623/140429100390144 failed: Thread died in Berkeley DB library error: db3 error(-30974) from dbenv->failchk: DB_RUNRECOVERY: Fatal error, run database recovery error...
  3. DevOps

    Tutorial How To Solve “Error: rpmdb open failed” Error In CentOS

    Today, I was testing Nginx web server in a CentOS 7 VM. Unfortunately, the power has gone in the middle of the update process. Since I don’t have a UPS, my host system went down immediately. After few minutes, the power came, and I turned on the VM again and started the upgrade process. When I...
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