bash process hacks

ps ax|less  #show running processes search process using /process name
kill unresponsive programs
pidof PROGRAMNAME
kill $pidof
OR even better 
kill $(pidof konsole)
eve better if killall node works
nice and renice to check/change priority
All list of tools related to system performance http://www.brendangregg.com/linuxperf.html
To check how much time a process is taking to finish
use-time processname
use perf for profiling node applications and apachebench to check server load
use pprofile3 for python and kcachegrind to visualize the time spent