shows jobs you started. First one is job number 1, second 2 etc. If you found out there was job number 1 that was your yum update, then simply
to kill it. %1 because it's the number one process of your own, not process ID 1.
and you should get the process ID (pid). Use that number:
If you can't kill it, make some force:
Or if you find it's not running anymore, but lock file exists, just remove it:
And then re-try