ps

display process in tree format

ps -auxwf
ps -auwww

Kill process

To kill a process

kill PID
kill -9 PID # sends SIGKILL

pspy

Process enumeration

pspy-binaries are already installed on kali linux. but if you need older binaries below is the link.
https://github.com/DominicBreuker/pspy

To terminate pspy after 5 minutes of execution. this is mandatory otherwise the tool keeps on running.
timeout 5m ./pspy64

process that run frequently
./pspy64 -pf -i 1000