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...
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...
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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