Virtuozzo for Linux VE/CT was locked for some reason and couldn’t start it

A VE/CT on Linux started and then stopped mysteriously. I couldn’t manually restart it with vzctl start 101. The following URL showed how to determine which PID had locked the VE/CT:


In this case running cat /vz/lock/101.lck showed that vzquota was recalculating the quota for the virtual environment.