A tar process that won't die!

[Lincoln Peters]

I'm trying to rebuild my parent's computer, and in the process, I tried to 
build a tarball from my mom's home directory.  That has taken a very strange 
turn.  I tried to cancel the operation, but I can't seem to kill it!  I send 
tar a CTRL-C (signal 2), a SIGTERM (signal 15), and even SIGKILL (signal 9), 
but tar just keeps running like heck, wasting CPU cycles and disk space on 
MY computer.

Why would it keep running even after a SIGKILL?

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