ps

ps aux view all processes ps axwef list processes and child processes in a tree ps lax show parent PID (PPID) and nice value (NI) ps -fp [pid pid] view information for multiple processes pstree show all currently running processes and their related child processes in tree format pgrep -f filter processes by process name ps -LF -u root show a user’s processes and threads. Option “L” (list threads), option “-F” (full format) ps aux –sort=-%mem sort by memory usage