Get process info

List thread of a process

ps -C firefox -L -o pid,tid,pcpu,state,nlwp,cmd

See used Resident Memory

ps -eF --sort -rss

Sort by process using SWAP

(echo "COMM PID SWAP"; for file in /proc/*/status ; do awk '/^Pid|VmSwap|Name/{printf $2 " " $3}END{ print ""}' $file; done | grep kB | grep -wv "0 kB" | sort -k 3 -n -r) | column -t