Ubuntu – How is one supposed to stop Chromium processes

A grab-bag of chrome poisons:

pgrep chrome | xargs kill # this is basically "pkill chrome"

Same thing, but sleep for 1/3 of a second in between:

for i in `pgrep chrome` ; do kill $i ;  sleep .33 ; done

Keep on killing 'til the killing's done :

while pgrep chrome ; do pkill chrome ; done

Short and sweet (but won't exit until you exit manually) :

watch pkill chrome 

Might work? :

for i in `pgrep chrome` ; do kill $i && wait $i ;  sleep .33 ; done

This can happen occasionally when Apache refuses to stop nicely or has Zombie Processes. For the former you can kill all running processes with sudo killall -9 apache2; however, for the latter you'll simple need to wait for them to go away. In the event it's Apache not wanting to stop nicely, what you'll really want to do is investigate what's going on. Finding out exactly what's going on can be difficult though.

An interactive strace of the process id may lend a clue as to what site(s) are acting up and causing issues. From your above ps -A you can check the first process with

strace -p 1663

This will attach to the running processes stack trace providing live output of what is going on. At any time you can Ctrl+C

An additional resource is the main error log for Apache this can be found in /var/log/apache2/error.log You'll want to get a decent chunk of the log and skim it for details. If the problem is an ongoing issue running

tail -f /var/log/apache2/error.log

This similar to the strace will run in realtime. For the last N lines replace -f with -# where the # is a positive number like 50, 100, 282, etc.