ps command
The ps command is used for manage the running process in our system.
Example :
1) VIT:/home/antony# ps
PID TTY TIME CMD
4717 pts/5 00:00:00 bash
4724 pts/5 00:00:00 ps
This command displays the active processes on your system
2) VIT:/home/antony# ps -e
PID TTY TIME CMD
1 ? 00:00:01 init
2 ? 00:00:00 migration/0
3 ? 00:00:00 ksoftirqd/0
4 ? 00:00:00 events/0
5 ? 00:00:00 khelper
6 ? 00:00:00 kthread
9 ? 00:00:00 kblockd/0
10 ? 00:00:00 kacpid
102 ? 00:00:00 kseriod
142 ? 00:00:00 pdflush
143 ? 00:00:00 pdflush
144 ? 00:00:00 kswapd0
145 ? 00:00:00 aio/0
588 ? 00:00:00 ata/0
590 ? 00:00:00 ata_aux
591 ? 00:00:00 khubd
593 ? 00:00:00 scsi_eh_0
595 ? 00:00:00 scsi_eh_1
1066 ? 00:00:00 kjournald
1247 ? 00:00:00 udevd
1632 ? 00:00:00 kpsmoused
1650 ? 00:00:00 kgameportd
1956 ? 00:00:00 kmirrord
2009 ? 00:00:00 kjournald
2340 ? 00:00:00 portmap
2592 ? 00:00:00 syslogd
2598 ? 00:00:00 klogd
2612 ? 00:00:00 named
2638 ? 00:00:00 lwresd
2662 ? 00:00:00 hpiod
2665 ? 00:00:00 python
2702 ? 00:00:00 postmaster
2705 ? 00:00:00 postmaster
2706 ? 00:00:00 postmaster
2707 ? 00:00:00 postmaster
2791 ? 00:00:00 acpid
2798 ? 00:00:00 dbus-daemon
2806 ? 00:00:03 hald
2807 ? 00:00:00 hald-runner
2813 ? 00:00:00 hald-addon-acpi
2817 ? 00:00:00 hald-addon-keyb
2830 ? 00:00:01 hald-addon-stor
2842 ? 00:00:00 hald-addon-stor
2849 ? 00:00:00 dhcdbd
2856 ? 00:00:00 NetworkManager
2871 ? 00:00:00 avahi-daemon
2872 ? 00:00:00 avahi-daemon
2879 ? 00:00:00 NetworkManagerD
2889 ? 00:00:00 dirmngr
2941 ? 00:00:00 exim4
2968 ? 00:00:00 papd
2970 ? 00:00:00 afpd
2972 ? 00:00:00 cnid_metad
2995 ? 00:00:00 nfsd4
2996 ? 00:00:00 nfsd
2997 ? 00:00:00 nfsd
2998 ? 00:00:00 nfsd
2999 ? 00:00:00 nfsd
3000 ? 00:00:00 nfsd
3001 ? 00:00:00 nfsd
3002 ? 00:00:00 nfsd
3003 ? 00:00:00 nfsd
3004 ? 00:00:00 lockd
3005 ? 00:00:00 rpciod/0
3009 ? 00:00:00 rpc.mountd
3019 ? 00:00:00 inetd
3026 ? 00:00:00 nmbd
3028 ? 00:00:00 smbd
3038 ? 00:00:00 smbd
3039 ? 00:00:00 winbindd
3086 ? 00:00:00 winbindd
3095 ? 00:00:00 gdm
3096 ? 00:00:00 gdm
3104 tty7 00:09:28 Xorg
3107 ? 00:00:00 rpc.statd
3120 ? 00:00:00 rpc.idmapd
3155 ? 00:00:00 hcid
3159 ? 00:00:00 sdpd
3171 ? 00:00:00 krfcommd
3240 ? 00:00:00 powersaved
3270 ? 00:00:00 atd
3277 ? 00:00:00 cron
3355 tty1 00:00:00 getty
3356 tty2 00:00:00 getty
3357 tty3 00:00:00 getty
3358 tty4 00:00:00 getty
3359 tty5 00:00:00 getty
3360 tty6 00:00:00 getty
3371 ? 00:00:01 gnome-session
3423 ? 00:00:00 ssh-agent
3426 ? 00:00:00 dbus-launch
3427 ? 00:00:00 dbus-daemon
3429 ? 00:00:00 gconfd-2
3432 ? 00:00:00 gnome-keyring-d
3434 ? 00:00:00 bonobo-activati
3436 ? 00:00:06 gnome-settings-
3439 ? 00:00:31 metacity
3455 ? 00:00:14 nautilus
3461 ? 00:00:00 vino-session
3462 ? 00:00:00 gnome-volume-ma
3468 ? 00:00:01 gnome-vfs-daemo
3484 ? 00:00:15 beagled
3488 ? 00:00:02 gnome-power-man
3501 ? 00:00:00 mapping-daemon
3518 ? 00:00:01 kbluetoothd.rea
3521 ? 00:00:06 gnome-screensav
3527 ? 00:00:14 gnome-panel
3529 ? 00:00:26 wnck-applet
3532 ? 00:00:02 mixer_applet2
3535 ? 00:00:00 notification-ar
3537 ? 00:00:01 clock-applet
3542 ? 00:00:00 passkey-agent
3545 ? 00:00:00 kdeinit
3548 ? 00:00:00 dcopserver
3550 ? 00:00:00 klauncher
3552 ? 00:00:04 kded
3556 ? 00:00:00 knotify
3560 ? 00:00:48 gksu
3565 pts/0 00:00:00 su
3568 pts/0 00:00:00 gksu-run-helper
3575 pts/0 00:00:10 gnome-terminal
3589 pts/0 00:00:00 gconfd-2
3591 ? 00:00:00 bonobo-activati
3592 pts/0 00:00:00 gnome-pty-helpe
3593 pts/1 00:00:00 bash
3619 ? 00:00:00 kdeinit
3623 ? 00:00:00 dcopserver
3625 ? 00:00:00 klauncher
3672 ? 00:00:06 knotify
3675 ? 00:00:02 artsd
3768 pts/1 00:00:07 kppp
3769 ? 00:00:00 kppp
3774 rfcomm0 00:00:00 pppd
3794 ? 00:12:36 firefox-bin
3931 ? 00:00:03 notification-da
3962 ? 00:00:00 winbindd
4248 ? 00:00:00 smbd
4395 ? 00:00:00 smbd
4680 pts/2 00:00:00 bash
4692 pts/2 00:00:00 man
4698 pts/2 00:00:00 pager
4717 pts/5 00:00:00 bash
4726 pts/5 00:00:00 ps
This ps -e displays all running processes on your system
3) VIT:/home/antony# ps -LF
UID PID PPID LWP C NLWP SZ RSS PSR STIME TTY TIME CMD
root 4717 3575 4717 0 1 991 1672 0 00:09 pts/5 00:00:00 bash
root 4731 4717 4731 0 1 857 992 0 00:13 pts/5 00:00:00 ps -LF
This ps -LF option displays the inforamtion about active process thread details on your system.
4) VIT:/home/antony# ps -ejH
PID PGID SID TTY TIME CMD
1 1 1 ? 00:00:01 init
2 1 1 ? 00:00:00 migration/0
3 1 1 ? 00:00:00 ksoftirqd/0
4 1 1 ? 00:00:00 events/0
5 1 1 ? 00:00:00 khelper
6 1 1 ? 00:00:00 kthread
9 1 1 ? 00:00:00 kblockd/0
10 1 1 ? 00:00:00 kacpid
102 1 1 ? 00:00:00 kseriod
142 1 1 ? 00:00:00 pdflush
143 1 1 ? 00:00:00 pdflush
144 1 1 ? 00:00:00 kswapd0
145 1 1 ? 00:00:00 aio/0
588 1 1 ? 00:00:00 ata/0
590 1 1 ? 00:00:00 ata_aux
591 1 1 ? 00:00:00 khubd
593 1 1 ? 00:00:00 scsi_eh_0
595 1 1 ? 00:00:00 scsi_eh_1
1066 1 1 ? 00:00:00 kjournald
1632 1 1 ? 00:00:00 kpsmoused
1650 1 1 ? 00:00:00 kgameportd
1956 1 1 ? 00:00:00 kmirrord
2009 1 1 ? 00:00:00 kjournald
2995 1 1 ? 00:00:00 nfsd4
3005 1 1 ? 00:00:00 rpciod/0
1247 1247 1247 ? 00:00:00 udevd
2340 2340 2340 ? 00:00:00 portmap
2592 2592 2592 ? 00:00:00 syslogd
2598 2598 2598 ? 00:00:00 klogd
2612 2612 2612 ? 00:00:00 named
2638 2638 2638 ? 00:00:00 lwresd
2662 2662 2662 ? 00:00:00 hpiod
2665 2664 2664 ? 00:00:00 python
2702 2698 2698 ? 00:00:00 postmaster
2705 2698 2698 ? 00:00:00 postmaste
r
2706 2698 2698 ? 00:00:00 postmaster
2707 2698 2698 ? 00:00:00 postmaster
2791 2791 2791 ? 00:00:00 acpid
2798 2798 2798 ? 00:00:00 dbus-daemon
2806 2806 2806 ? 00:00:03 hald
2807 2806 2806 ? 00:00:00 hald-runner
2813 2806 2806 ? 00:00:00 hald-addon-acpi
2817 2806 2806 ? 00:00:00 hald-addon-keyb
2830 2806 2806 ? 00:00:01 hald-addon-stor
2842 2806 2806 ? 00:00:00 hald-addon-stor
2849 2849 2849 ? 00:00:00 dhcdbd
2856 2856 2856 ? 00:00:00 NetworkManager
2871 2871 2871 ? 00:00:00 avahi-daemon
2872 2872 2872 ? 00:00:00 avahi-daemon
2879 2879 2879 ? 00:00:00 NetworkManagerD
2889 2889 2889 ? 00:00:00 dirmngr
2941 2941 2941 ? 00:00:00 exim4
2968 2561 2561 ? 00:00:00 papd
2970 2561 2561 ? 00:00:00 afpd
2972 2972 2561 ? 00:00:00 cnid_metad
2996 1 1 ? 00:00:00 nfsd
2997 1 1 ? 00:00:00 nfsd
2998 1 1 ? 00:00:00 nfsd
2999 1 1 ? 00:00:00 nfsd
3000 1 1 ? 00:00:00 nfsd
3001 1 1 ? 00:00:00 nfsd
3002 1 1 ? 00:00:00 nfsd
3003 1 1 ? 00:00:00 nfsd
3004 1 1 ? 00:00:00 lockd
3009 3009 3009 ? 00:00:00 rpc.mountd
3019 3019 3019 ? 00:00:00 inetd
3026 3026 3026 ? 00:00:00 nmbd
3028 3028 3028 ? 00:00:00 smbd
3038 3028 3028 ? 00:00:00 smbd
4248 3028 3028 ? 00:00:00 smbd
4395 3028 3028 ? 00:00:00 smbd
3039 3039 3039 ? 00:00:00 winbindd
3086 3039 3039 ? 00:00:00 winbindd
3962 3039 3039 ? 00:00:00 winbindd
3095 3095 3095 ? 00:00:00 gdm
3096 3096 3095 ? 00:00:00 gdm
3104 3104 3104 tty7 00:09:43 Xorg
3371 3371 3371 ? 00:00:01 gnome-session
3423 3423 3423 ? 00:00:00 ssh-agent
3107 3107 3107 ? 00:00:00 rpc.statd
3120 3120 3120 ? 00:00:00 rpc.idmapd
3155 3155 3155 ? 00:00:00 hcid
3159 3159 3159 ? 00:00:00 sdpd
3171 1 1 ? 00:00:00 krfcommd
3240 3239 3239 ? 00:00:00 powersaved
3270 3270 3270 ? 00:00:00 atd
3277 3277 3277 ? 00:00:00 cron
3355 3355 3355 tty1 00:00:00 getty
3356 3356 3356 tty2 00:00:00 getty
3357 3357 3357 tty3 00:00:00 getty
3358 3358 3358 tty4 00:00:00 getty
3359 3359 3359 tty5 00:00:00 getty
3360 3360 3360 tty6 00:00:00 getty
3426 3371 3371 ? 00:00:00 dbus-launch
3427 3427 3427 ? 00:00:00 dbus-daemon
3429 3371 3371 ? 00:00:00 gconfd-2
3432 3371 3371 ? 00:00:00 gnome-keyring-d
3434 3434 3434 ? 00:00:00 bonobo-activati
3436 3434 3434 ? 00:00:06 gnome-settings-
3439 3439 3439 ? 00:00:32 metacity
3455 3455 3455 ? 00:00:14 nautilus
3461 3461 3461 ? 00:00:00 vino-session
3462 3462 3462 ? 00:00:00 gnome-volume-ma
3468 3434 3434 ? 00:00:01 gnome-vfs-daemo
3484 3481 3481 ? 00:00:15 beagled
3488 3488 3488 ? 00:00:02 gnome-power-man
3501 3455 3455 ? 00:00:00 mapping-daemon
3518 3453 3453 ? 00:00:01 kbluetoothd.rea
3521 3521 3521 ? 00:00:06 gnome-screensav
3527 3527 3527 ? 00:00:14 gnome-panel
3529 3434 3434 ? 00:00:26 wnck-applet
3532 3434 3434 ? 00:00:02 mixer_applet2
3535 3434 3434 ? 00:00:01 notification-ar
3537 3434 3434 ? 00:00:01 clock-applet
3542 3527 3527 ? 00:00:00 passkey-agent
3545 3545 3545 ? 00:00:00 kdeinit
3550 3545 3545 ? 00:00:00 klauncher
3548 3545 3545 ? 00:00:00 dcopserver
3552 3545 3545 ? 00:00:04 kded
3556 3545 3545 ? 00:00:00 knotify
3560 3455 3455 ? 00:00:50 gksu
3565 3565 3565 pts/0 00:00:00 su
3568 3565 3565 pts/0 00:00:00 gksu-run-helper
3575 3565 3565 pts/0 00:00:12 gnome-terminal
3592 3565 3565 pts/0 00:00:00 gnome-pty-helpe
3593 3593 3593 pts/1 00:00:00 bash
3768 3768 3593 pts/1 00:00:07 kppp
3769 3769 3769 ? 00:00:00 kppp
3774 3774 3774 rfcomm0 00:00:00 pppd
4680 4680 4680 pts/2 00:00:00 bash
4692 4692 4680 pts/2 00:00:00 man
4698 4692 4680 pts/2 00:00:00 pager
4717 4717 4717 pts/5 00:00:00 bash
4736 4736 4717 pts/5 00:00:00 ps
3589 3565 3565 pts/0 00:00:00 gconfd-2
3591 3591 3591 ? 00:00:00 bonobo-activati
3619 3619 3619 ? 00:00:00 kdeinit
3625 3619 3619 ? 00:00:00 klauncher
3623 3619 3619 ? 00:00:00 dcopserver
3672 3619 3619 ? 00:00:06 knotify
3675 3619 3619 ? 00:00:02 artsd
3794 3527 3527 ? 00:12:56 firefox-bin
3931 3427 3427 ? 00:00:03 notification-da
This ps -eJF option displays the process tree of all running processes
Not so helpful. ps –help will provide a better info. Also there is too much ‘real’ detail about your system here… at least I can tell you that this post was not created on the web server hosting this site
Regards.