Latif Basics Part22 Process Management -PS and KILL
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ps -- display snapshot current running process
ps - report a snapshot of the current processes.
every process must has pid
and pid is may not same every time
pid - process id
ppid - parent process id
some process may have child process
P1 -process
P11 -child process to p1
P1 pid -1012
P11 pid -1132 ppid-1012
man ps
ps -e
ps -ef
ps -aux
ps -a
ps -oe
EXAMPLES
To see every process on the system using standard syntax:
ps -e
ps -ef
ps -eF
ps -ely
To see every process on the system using BSD syntax:
ps ax
ps axu
To print a process tree:
ps -ejH
ps axjf
To get info about threads:
ps -eLf
ps axms
To get security info:
ps -eo euser,ruser,suser,fuser,f,comm,label
ps axZ
ps -eM
To see every process running as root (real & effective ID) in user
format:
ps -U root -u root u
To see every process with a user-defined format:
ps -eo pid,tid,class,rtprio,ni,pri,psr,pcpu,stat,wchan:14,comm
ps axo stat,euid,ruid,tty,tpgid,sess,pgrp,ppid,pid,pcpu,comm
ps -Ao pid,tt,user,fname,tmout,f,wchan
Print only the process IDs of syslogd:
ps -C syslogd -o pid=
Print only the name of PID 42:
ps -q 42 -o comm=
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ps
ps -e
ps -ef
ps -aux
ps -eo user,pid,ni,cmd
ps -eo user,pid,ni,cmd | grep gedit
root 5319 0 /usr/bin/gedit --gapplication-service
root 5406 0 grep --color=auto gedit
kill 5319
ps -eo user,pid,ni,cmd | grep gedit
root 5428 0 grep --color=auto gedit
ps -eo user,pid,ni,cmd | grep gedit
root 5437 0 /usr/bin/gedit --gapplication-service
root 5446 0 grep --color=auto gedit
to terminate process
kill pid
sleep 1000 &
[1] 5723
ps -eo user,pid,ni,cmd | grep sleep
student+ 5723 0 sleep 1000
root 5732 0 sleep 60
student+ 5734 0 grep --color=auto sleep
kill 5723
ps -eo user,pid,ni,cmd | grep sleep
root 5743 0 sleep 60
student+ 5745 0 grep --color=auto sleep
[1]+ Terminated sleep 1000
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