ps.md

ps

List currently running processes:

# ps -ef # ps -aux

List the processes based on user(s):

# ps -f -u jay # ps -f -u jay,root

List processes based on PID:

# ps -f -p <PID1>,<PID2>,<PID3>

List processes based on PPID:

# ps -f --ppid <PID>

List processes in a hierarchy:

# ps -e -o pid,args --forest

List elapsed wall time for processes:

# ps -p <PID1>,<PID2>,<PID3> -o pid,etime=

List all threads for a particular process:

# ps -C java -L -o pid,tid,pcpu,state,nlwp,args

List proesses but sort by memory usage (useful in finding memory leaks):

# ps aux --sort pmem

Show top five processes consuming the most CPU:

# ps aux --sort=-pcpu | head -5

Show the top five processes consuming the most CPU, with condensed columns:

# ps -e -o pid,uname,pcpu,pmem,comm --sort=-pcpu |head -n 5

Show top five processes consuming the most memory:

# ps aux --sort=-pmem | head -5

Show top five processes using memory, with condensed columns:

# ps -e -o pid,uname,pcpu,pmem,comm --sort=-pmem |head -n 5

Display child processes of a parent process

# ps -o pid,uname,comm -C apache2

Real time output:

watch -n 1 'ps -e -o pid,uname,cmd,pmem,pcpu --sort=-pmem,-pcpu | head -15'