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CentOS – Existing lock /var/run/yum.pid: another copy is running as pid xxxx.

May 29, 2017 by @HKw@! | Filed under centos, Fedora, Linux, RedHat.

Error Message “Existing lock /var/run/yum.pid: another copy is running as pid xxxx.”  is a very common error which you might come across in Red Hat Linux distro while trying to run yum command.

As you see the error from above screenshot, it mentioned that yum command is locked by another application. Meaning that someone already run the yum command and the process is running.

To find out which process and user holding the yum lock, just enter following command:-

From the above screenshot, PID 11290 is currently run by root user and holding the yum lock.

Solution

It is very easy to solve this issue, first wait the process finished. Second is kill the process ID. Below is the command to kill the PID

kill -9 11290

Now you should able to use yum command.

Cheers!

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