Processes

ps -ef

show processes

ps aux

alternative version, useful for mem . info

top or htop (if installed)

show resources

ipcs -m

processes shared memory

kill <PID>

kill a process

lsof

tands for LiSt Open Files and shows open files and which process uses them

lsof -Pp <pid>

file list used by the process <pid>

lsof -Pp <pid> | grep log

search for the log related to <pid>