Display Active Running Process, Check Process Run on Linux, using ps Command

 

    The process on Linux system can be the command that you use, or the program that run on your Linux machine.  There is many command that we can use to check the active process... but on this article we show how to check active running process using ps command ( ps command, report a snapshot of the current processes)

Ps command without any option:

# ps

[root@fedora ~]# ps

PID TTY TIME CMD

2708 pts/1 00:00:00 bash

2958 pts/1 00:00:00 ps

[root@fedora ~]#

 

To see every process on the system using standard syntax:

# ps -e

# ps -ef

# ps -eF

# ps -ely

ps -ely Command example:

[root@fedora ~]# ps -ely

S UID PID PPID C PRI NI RSS SZ WCHAN TTY TIME CMD

S 0 1 0 0 80 0 740 487 select ? 00:00:04 init

S 0 2 0 0 75 -5 0 0 kthrea ? 00:00:00 kthreadd

S 0 3 2 0 -40 - 0 0 migrat ? 00:00:00 migration/0

S 0 4 2 0 75 -5 0 0 ksofti ? 00:00:00 ksoftirqd/0

S 0 5 2 0 -40 - 0 0 watchd ? 00:00:00 watchdog/0

.........

S 0 2618 1 0 80 0 4424 4260 sys_po ? 00:00:00 consolehelper-g

S 0 2619 2618 0 80 0 1288 1495 wait ? 00:00:00 userhelper

S 0 2622 2619 0 80 0 29240 16876 sys_po ? 00:00:02 /usr/sbin/system

R 0 2702 1944 0 80 0 2868 2514 - ? 00:00:01 sshd

S 0 2704 1944 0 80 0 2848 2514 select ? 00:00:00 sshd

S 0 2708 2702 0 80 0 1528 1200 wait pts/1 00:00:00 bash

S 0 2752 2704 0 80 0 1292 1200 unix_s ? 00:00:00 bash

R 0 2957 2708 5 80 0 808 1137 - pts/1 00:00:00 ps

[root@fedora ~]#

 

To see every process on the system using BSD syntax:

# ps ax

# ps axu

ps axu command example:

[root@fedora ~]# ps axu

USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND

root 1 0.1 0.0 1948 740 ? Ss 05:08 0:04 /sbin/init

root 2 0.0 0.0 0 0 ? S< 05:08 0:00 [kthreadd]

root 3 0.0 0.0 0 0 ? S< 05:08 0:00 [migration/0]

root 4 0.0 0.0 0 0 ? S< 05:08 0:00 [ksoftirqd/0]

root 5 0.0 0.0 0 0 ? S< 05:08 0:00 [watchdog/0]

...........................

root 2618 0.0 0.5 17040 4424 ? S 05:26 0:00 /usr/bin/system-config-network

root 2619 0.0 0.1 5980 1288 ? S 05:26 0:00 /usr/sbin/userhelper -w system-config-network

root 2622 0.1 3.5 67504 29236 ? S 05:26 0:02 /usr/bin/python /usr/sbin/system-config-network-gui

root 2702 0.0 0.3 10056 2868 ? Rs 05:27 0:01 sshd: root@pts/1

root 2704 0.0 0.3 10056 2848 ? Ss 05:28 0:00 sshd: root@notty

root 2708 0.0 0.1 4800 1524 pts/1 Ss 05:28 0:00 -bash

root 2752 0.0 0.1 4800 1292 ? Ss 05:28 0:00 -bash

root 2900 6.0 0.1 4596 940 pts/1 R+ 05:54 0:00 ps axu

[root@fedora ~]#