Fix frozen yum process

fix-frozen-yum.md

Yum is frozen and wont react

There are a couple of reasons why this happens but I always managed to get it back to work with the following steps:

1. Send the process to the background by hitting CTRL + Z
2. Identify the process id with ps aux | grep yum
3. Kill the yum process with kill -9 PROCESS_ID
4. Run the following commands or put them together in a script:

rm -f /var/lib/rpm/__*
rm -f /var/run/yum.pid
rm -f /var/lib/rpm/__db*
rm -f /var/lib/rpm/.rpm.lock
rm -f /var/lib/rpm/.dbenv.lock
rpm --rebuilddb
yum clean all

5. Run yum update again