Process, zombie process, fork, thread: ps
, tree
, pstree
, ps axf
, proc
, pwdx
, which
, watch
, sar -q
, tload
, uptime
, Interrupts, pgrep
, tasklist
(Windows), Zombie process, pstack
, docker ps
, docker-compose ps
, jobs
, acct
, process mrelease
, pidstat
, IPC, pidof