In Linux, monitoring running processes is a key part of system administration. The ps and top commands are the primary tools used to list active processes on the system. By default, they show processes for all users and groups, making it hard to focus on specific users or groups.

In many cases, administrators need to filter processes by user or group. This can be useful for troubleshooting or managing resources in multi-user environments. The ps, pgrep, and top commands can be used with specific options to list processes for individual users or groups.

These tools allow you to isolate processes based on real user IDs, usernames, group names, or group IDs. Learning how to use these commands effectively is essential for managing tasks on Linux systems, especially in shared environments.

Related: How to view active processes in Linux

Steps to list processes by user and group in Linux:

  1. Show processes for a single user using the ps command. 
    $ ps -u user -U user
    PID TTY          TIME CMD
   1423 ?        00:00:00 systemd
   1424 ?        00:00:00 (sd-pam)
   1430 ?        00:00:00 pipewire
   1431 ?        00:00:00 pipewire-media-
   1432 ?        00:00:00 pulseaudio
   1434 ?        00:00:00 tracker-miner-f
   1437 ?        00:00:00 dbus-daemon
   1439 ?        00:00:00 gnome-keyring-d
   1459 ?        00:00:00 gvfsd
   1464 ?        00:00:00 gvfsd-fuse
   1466 ?        00:00:00 gvfs-udisks2-vo
   1477 ?        00:00:00 gvfs-goa-volume
   1482 ?        00:00:00 goa-daemon
   1492 ?        00:00:00 goa-identity-se
   1499 ?        00:00:00 gvfs-gphoto2-vo
   1503 ?        00:00:00 gvfs-mtp-volume
   1509 tty2     00:00:00 gdm-wayland-ses
   1511 ?        00:00:00 gvfs-afc-volume
   1517 tty2     00:00:00 gnome-session-b
   1568 ?        00:00:00 gnome-session-c
   1576 ?        00:00:00 gnome-session-b
   1593 ?        00:00:04 gnome-shell
   1597 ?        00:00:00 at-spi-bus-laun
   1605 ?        00:00:00 dbus-daemon
   1613 ?        00:00:00 Xwayland
   1634 ?        00:00:00 xdg-permission-
   1636 ?        00:00:00 gnome-shell-cal
   1645 ?        00:00:00 evolution-sourc
   1652 ?        00:00:00 evolution-calen
   1660 ?        00:00:00 dconf-service
   1664 ?        00:00:00 evolution-addre
   1682 ?        00:00:00 gjs
   1684 ?        00:00:00 at-spi2-registr
   1694 ?        00:00:00 gvfsd-trash
   1699 ?        00:00:00 gsd-a11y-settin
   1700 ?        00:00:00 gsd-color
   1702 ?        00:00:00 gsd-datetime
   1703 ?        00:00:00 gsd-housekeepin
   1705 ?        00:00:00 gsd-keyboard
   1719 ?        00:00:00 gsd-media-keys
   1722 ?        00:00:00 gsd-power
   1723 ?        00:00:00 gsd-print-notif
   1724 ?        00:00:00 gsd-rfkill
   1728 ?        00:00:00 gsd-screensaver
   1735 ?        00:00:00 gsd-sharing
   1736 ?        00:00:00 gsd-smartcard
   1752 ?        00:00:00 gsd-sound
   1754 ?        00:00:00 gsd-wacom
   1761 ?        00:00:00 gsd-disk-utilit
   1774 ?        00:00:00 evolution-alarm
   1778 ?        00:00:00 gsd-printer
   1781 ?        00:00:00 vmtoolsd
   1861 ?        00:00:00 ibus-daemon
   1862 ?        00:00:00 gsd-xsettings
   1885 ?        00:00:00 ibus-dconf
   1887 ?        00:00:00 ibus-extension-
   1889 ?        00:00:00 ibus-x11
   1900 ?        00:00:00 ibus-portal
   1919 ?        00:00:00 ibus-engine-sim
   1929 ?        00:00:00 gjs
   1960 ?        00:00:00 gnome-terminal-
   1962 ?        00:00:00 gnome-calendar
   1963 ?        00:00:00 gnome-control-c
   2184 pts/0    00:00:00 bash
   2213 ?        00:00:00 gvfsd-metadata
   2216 ?        00:00:00 update-notifier
   2240 pts/0    00:00:00 ps

    The -u option lists processes for a specific user by their username. 

    -U      Display the processes belonging to the specified real user IDs.
-u      Display the processes belonging to the specified usernames.

    user is a real user and group name in the system. 

    $ id
uid=1000(user) gid=1000(user) groups=1000(user),4(adm),24(cdrom),27(sudo),30(dip),46(plugdev),121(lpadmin),132(lxd),133(sambashare)
  2. Show processes for a single group using the ps command. 
    $ ps -g user -G user
    PID TTY          TIME CMD
   1418 ?        00:00:00 gdm-session-wor
   1423 ?        00:00:00 systemd
   1424 ?        00:00:00 (sd-pam)
   1430 ?        00:00:00 pipewire
   1431 ?        00:00:00 pipewire-media-
   1432 ?        00:00:00 pulseaudio
   1434 ?        00:00:00 tracker-miner-f
   1437 ?        00:00:00 dbus-daemon
   1439 ?        00:00:00 gnome-keyring-d
   1459 ?        00:00:00 gvfsd
   1464 ?        00:00:00 gvfsd-fuse
   1466 ?        00:00:00 gvfs-udisks2-vo
   1477 ?        00:00:00 gvfs-goa-volume
   1482 ?        00:00:00 goa-daemon
   1492 ?        00:00:00 goa-identity-se
   1499 ?        00:00:00 gvfs-gphoto2-vo
   1503 ?        00:00:00 gvfs-mtp-volume
   1509 tty2     00:00:00 gdm-wayland-ses
   1511 ?        00:00:00 gvfs-afc-volume
   1517 tty2     00:00:00 gnome-session-b
   1568 ?        00:00:00 gnome-session-c
   1576 ?        00:00:00 gnome-session-b
   1593 ?        00:00:05 gnome-shell
   1597 ?        00:00:00 at-spi-bus-laun
   1605 ?        00:00:00 dbus-daemon
   1613 ?        00:00:00 Xwayland
   1634 ?        00:00:00 xdg-permission-
   1636 ?        00:00:00 gnome-shell-cal
   1645 ?        00:00:00 evolution-sourc
   1652 ?        00:00:00 evolution-calen
   1660 ?        00:00:00 dconf-service
   1664 ?        00:00:00 evolution-addre
   1682 ?        00:00:00 gjs
   1684 ?        00:00:00 at-spi2-registr
   1694 ?        00:00:00 gvfsd-trash
   1699 ?        00:00:00 gsd-a11y-settin
   1700 ?        00:00:00 gsd-color
   1702 ?        00:00:00 gsd-datetime
   1703 ?        00:00:00 gsd-housekeepin
   1705 ?        00:00:00 gsd-keyboard
   1719 ?        00:00:00 gsd-media-keys
   1722 ?        00:00:00 gsd-power
   1723 ?        00:00:00 gsd-print-notif
   1724 ?        00:00:00 gsd-rfkill
   1728 ?        00:00:00 gsd-screensaver
   1735 ?        00:00:00 gsd-sharing
   1736 ?        00:00:00 gsd-smartcard
   1752 ?        00:00:00 gsd-sound
   1754 ?        00:00:00 gsd-wacom
   1761 ?        00:00:00 gsd-disk-utilit
   1774 ?        00:00:00 evolution-alarm
   1778 ?        00:00:00 gsd-printer
   1781 ?        00:00:00 vmtoolsd
   1861 ?        00:00:00 ibus-daemon
   1862 ?        00:00:00 gsd-xsettings
   1885 ?        00:00:00 ibus-dconf
   1887 ?        00:00:00 ibus-extension-
   1889 ?        00:00:00 ibus-x11
   1900 ?        00:00:00 ibus-portal
   1919 ?        00:00:00 ibus-engine-sim
   1929 ?        00:00:00 gjs
   1960 ?        00:00:01 gnome-terminal-
   1962 ?        00:00:00 gnome-calendar
   2184 pts/0    00:00:00 bash
   2213 ?        00:00:00 gvfsd-metadata
   2216 ?        00:00:00 update-notifier
   2246 ?        00:00:00 deja-dup-monito
   2271 pts/0    00:00:00 ps

    The -g option lists processes based on the specified group name. 

    -G      Display information about processes which are running with the specified real group IDs.
-g      Display information about processes with the specified process group leaders.
  3. List processes for multiple users with the ps command. 
    $ ps -u user,root -U user,root
    PID TTY          TIME CMD
      1 ?        00:00:02 systemd
      2 ?        00:00:00 kthreadd
      3 ?        00:00:00 rcu_gp
      4 ?        00:00:00 rcu_par_gp
      6 ?        00:00:00 kworker/0:0H-events_highpri
      7 ?        00:00:00 kworker/0:1-events
      8 ?        00:00:00 kworker/u256:0-ext4-rsv-conversion
      9 ?        00:00:00 mm_percpu_wq
     10 ?        00:00:00 rcu_tasks_rude_
     11 ?        00:00:00 rcu_tasks_trace
     12 ?        00:00:00 ksoftirqd/0
     13 ?        00:00:00 rcu_sched
     14 ?        00:00:00 migration/0
     15 ?        00:00:00 idle_inject/0
     16 ?        00:00:00 cpuhp/0
     17 ?        00:00:00 cpuhp/1
     18 ?        00:00:00 idle_inject/1
     19 ?        00:00:00 migration/1
     20 ?        00:00:00 ksoftirqd/1
     21 ?        00:00:00 kworker/1:0-events
     22 ?        00:00:00 kworker/1:0H-events_highpri
     23 ?        00:00:00 kdevtmpfs
     24 ?        00:00:00 netns
     25 ?        00:00:00 inet_frag_wq
     26 ?        00:00:00 kauditd
     27 ?        00:00:00 kworker/0:2-events
     28 ?        00:00:00 khungtaskd
     29 ?        00:00:00 oom_reaper
     30 ?        00:00:00 writeback
     31 ?        00:00:00 kcompactd0
     32 ?        00:00:00 ksmd
     33 ?        00:00:00 khugepaged
     37 ?        00:00:00 kworker/1:1-events
     80 ?        00:00:00 kintegrityd
     81 ?        00:00:00 kblockd
     82 ?        00:00:00 blkcg_punt_bio
     83 ?        00:00:00 tpm_dev_wq
     84 ?        00:00:00 ata_sff
     85 ?        00:00:00 md
     86 ?        00:00:00 edac-poller
     87 ?        00:00:00 devfreq_wq
     88 ?        00:00:00 watchdogd
     90 ?        00:00:00 kworker/0:1H-kblockd
     92 ?        00:00:00 kswapd0
     93 ?        00:00:00 ecryptfs-kthrea
     95 ?        00:00:00 kthrotld
     96 ?        00:00:00 irq/24-pciehp
     97 ?        00:00:00 irq/25-pciehp
     98 ?        00:00:00 irq/26-pciehp
     99 ?        00:00:00 irq/27-pciehp
    100 ?        00:00:00 irq/28-pciehp
    101 ?        00:00:00 irq/29-pciehp
    102 ?        00:00:00 irq/30-pciehp
    103 ?        00:00:00 irq/31-pciehp
    104 ?        00:00:00 irq/32-pciehp
    105 ?        00:00:00 irq/33-pciehp
    106 ?        00:00:00 irq/34-pciehp
    107 ?        00:00:00 irq/35-pciehp
    108 ?        00:00:00 irq/36-pciehp
    109 ?        00:00:00 irq/37-pciehp
    110 ?        00:00:00 irq/38-pciehp
    111 ?        00:00:00 irq/39-pciehp
    112 ?        00:00:00 irq/40-pciehp
    113 ?        00:00:00 irq/41-pciehp
    114 ?        00:00:00 irq/42-pciehp
    115 ?        00:00:00 irq/43-pciehp
    116 ?        00:00:00 irq/44-pciehp
    117 ?        00:00:00 irq/45-pciehp
    118 ?        00:00:00 irq/46-pciehp
    119 ?        00:00:00 irq/47-pciehp
    120 ?        00:00:00 irq/48-pciehp
    121 ?        00:00:00 irq/49-pciehp
    122 ?        00:00:00 irq/50-pciehp
    123 ?        00:00:00 irq/51-pciehp
    124 ?        00:00:00 irq/52-pciehp
    125 ?        00:00:00 irq/53-pciehp
    126 ?        00:00:00 irq/54-pciehp
    127 ?        00:00:00 irq/55-pciehp
    128 ?        00:00:00 acpi_thermal_pm
    130 ?        00:00:00 scsi_eh_0
    131 ?        00:00:00 scsi_tmf_0
    132 ?        00:00:00 scsi_eh_1
    133 ?        00:00:00 scsi_tmf_1
    135 ?        00:00:00 vfio-irqfd-clea
    136 ?        00:00:00 kworker/1:1H-kblockd
    137 ?        00:00:00 ipv6_addrconf
    147 ?        00:00:00 kstrp
    150 ?        00:00:00 zswap-shrink
    151 ?        00:00:00 kworker/u257:0-hci0
    156 ?        00:00:00 charger_manager
    203 ?        00:00:00 mpt_poll_0
    204 ?        00:00:00 mpt/0
    205 ?        00:00:00 scsi_eh_2
    206 ?        00:00:00 scsi_tmf_2
    207 ?        00:00:00 scsi_eh_3
    208 ?        00:00:00 scsi_tmf_3
    209 ?        00:00:00 scsi_eh_4
    210 ?        00:00:00 scsi_tmf_4
    211 ?        00:00:00 scsi_eh_5
    212 ?        00:00:00 scsi_tmf_5
    213 ?        00:00:00 scsi_eh_6
    214 ?        00:00:00 scsi_tmf_6
    215 ?        00:00:00 scsi_eh_7
    217 ?        00:00:00 scsi_tmf_7
    218 ?        00:00:00 scsi_eh_8
    219 ?        00:00:00 scsi_tmf_8
    220 ?        00:00:00 scsi_eh_9
    221 ?        00:00:00 scsi_tmf_9
    222 ?        00:00:00 scsi_eh_10
    223 ?        00:00:00 scsi_tmf_10
    224 ?        00:00:00 scsi_eh_11
    225 ?        00:00:00 scsi_tmf_11
    226 ?        00:00:00 scsi_eh_12
    227 ?        00:00:00 scsi_tmf_12
    228 ?        00:00:00 scsi_eh_13
    229 ?        00:00:00 scsi_tmf_13
    230 ?        00:00:00 scsi_eh_14
    231 ?        00:00:00 scsi_tmf_14
    232 ?        00:00:00 scsi_eh_15
    233 ?        00:00:00 scsi_tmf_15
    234 ?        00:00:00 scsi_eh_16
    235 ?        00:00:00 scsi_tmf_16
    236 ?        00:00:00 scsi_eh_17
    237 ?        00:00:00 scsi_tmf_17
    238 ?        00:00:00 scsi_eh_18
    239 ?        00:00:00 scsi_tmf_18
    240 ?        00:00:00 scsi_eh_19
    241 ?        00:00:00 scsi_tmf_19
    242 ?        00:00:00 scsi_eh_20
    243 ?        00:00:00 scsi_tmf_20
    244 ?        00:00:00 scsi_eh_21
    245 ?        00:00:00 scsi_tmf_21
    246 ?        00:00:00 scsi_eh_22
    247 ?        00:00:00 scsi_tmf_22
    248 ?        00:00:00 scsi_eh_23
    249 ?        00:00:00 scsi_tmf_23
    250 ?        00:00:00 scsi_eh_24
    251 ?        00:00:00 scsi_tmf_24
    252 ?        00:00:00 scsi_eh_25
    253 ?        00:00:00 scsi_tmf_25
    254 ?        00:00:00 scsi_eh_26
    255 ?        00:00:00 scsi_tmf_26
    256 ?        00:00:00 scsi_eh_27
    257 ?        00:00:00 scsi_tmf_27
    258 ?        00:00:00 scsi_eh_28
    259 ?        00:00:00 scsi_tmf_28
    260 ?        00:00:00 scsi_eh_29
    261 ?        00:00:00 scsi_tmf_29
    262 ?        00:00:00 scsi_eh_30
    263 ?        00:00:00 scsi_tmf_30
    264 ?        00:00:00 scsi_eh_31
    265 ?        00:00:00 scsi_tmf_31
    289 ?        00:00:00 kworker/u256:28-events_unbound
    290 ?        00:00:00 kworker/u256:29-ext4-rsv-conversion
    291 ?        00:00:00 kworker/u256:30-events_unbound
    292 ?        00:00:00 scsi_eh_32
    293 ?        00:00:00 scsi_tmf_32
    316 ?        00:00:00 jbd2/sda3-8
    317 ?        00:00:00 ext4-rsv-conver
    356 ?        00:00:00 systemd-journal
    380 ?        00:00:00 kworker/0:3-rcu_par_gp
    385 ?        00:00:00 systemd-udevd
    386 ?        00:00:00 vmware-vmblock-
    389 ?        00:00:00 irq/16-vmwgfx
    390 ?        00:00:00 ttm_swap
    391 ?        00:00:00 card0-crtc0
    392 ?        00:00:00 card0-crtc1
    393 ?        00:00:00 card0-crtc2
    394 ?        00:00:00 card0-crtc3
    395 ?        00:00:00 card0-crtc4
    396 ?        00:00:00 card0-crtc5
    397 ?        00:00:00 card0-crtc6
    398 ?        00:00:00 card0-crtc7
    404 ?        00:00:00 loop0
    406 ?        00:00:00 loop1
    407 ?        00:00:00 loop2
    408 ?        00:00:00 loop3
    430 ?        00:00:00 loop4
    437 ?        00:00:00 loop5
    438 ?        00:00:00 loop6
    439 ?        00:00:00 loop7
    444 ?        00:00:00 loop8
    445 ?        00:00:00 loop9
    493 ?        00:00:00 kworker/u257:2-hci0
    521 ?        00:00:00 cryptd
    722 ?        00:00:00 VGAuthService
    728 ?        00:00:00 vmtoolsd
    742 ?        00:00:00 accounts-daemon
    743 ?        00:00:00 acpid
    744 ?        00:00:00 anacron
    747 ?        00:00:00 bluetoothd
    749 ?        00:00:00 cron
    754 ?        00:00:00 NetworkManager
    759 ?        00:00:00 irqbalance
    760 ?        00:00:00 networkd-dispat
    765 ?        00:00:00 polkitd
    769 ?        00:00:00 power-profiles-
    781 ?        00:00:01 snapd
    785 ?        00:00:00 switcheroo-cont
    788 ?        00:00:00 systemd-logind
    791 ?        00:00:00 udisksd
    794 ?        00:00:00 wpa_supplicant
    849 ?        00:00:00 ModemManager
    870 ?        00:00:00 unattended-upgr
    884 ?        00:00:00 gdm3
    897 ?        00:00:00 cupsd
    904 ?        00:00:00 cups-browsed
   1124 ?        00:00:00 upowerd
   1215 ?        00:00:00 packagekitd
   1418 ?        00:00:00 gdm-session-wor
   1423 ?        00:00:00 systemd
   1424 ?        00:00:00 (sd-pam)
   1430 ?        00:00:00 pipewire
   1431 ?        00:00:00 pipewire-media-
   1432 ?        00:00:00 pulseaudio
   1434 ?        00:00:00 tracker-miner-f
   1437 ?        00:00:00 dbus-daemon
   1439 ?        00:00:00 gnome-keyring-d
   1459 ?        00:00:00 gvfsd
   1464 ?        00:00:00 gvfsd-fuse
   1466 ?        00:00:00 gvfs-udisks2-vo
   1477 ?        00:00:00 gvfs-goa-volume
   1482 ?        00:00:00 goa-daemon
   1492 ?        00:00:00 goa-identity-se
   1494 ?        00:00:00 krfcommd
   1499 ?        00:00:00 gvfs-gphoto2-vo
   1503 ?        00:00:00 gvfs-mtp-volume
   1509 tty2     00:00:00 gdm-wayland-ses
   1511 ?        00:00:00 gvfs-afc-volume
   1517 tty2     00:00:00 gnome-session-b
   1568 ?        00:00:00 gnome-session-c
   1576 ?        00:00:00 gnome-session-b
   1593 ?        00:00:06 gnome-shell
   1597 ?        00:00:00 at-spi-bus-laun
   1605 ?        00:00:00 dbus-daemon
   1613 ?        00:00:00 Xwayland
   1634 ?        00:00:00 xdg-permission-
   1636 ?        00:00:00 gnome-shell-cal
   1645 ?        00:00:00 evolution-sourc
   1652 ?        00:00:00 evolution-calen
   1660 ?        00:00:00 dconf-service
   1664 ?        00:00:00 evolution-addre
   1682 ?        00:00:00 gjs
   1684 ?        00:00:00 at-spi2-registr
   1694 ?        00:00:00 gvfsd-trash
   1699 ?        00:00:00 gsd-a11y-settin
   1700 ?        00:00:00 gsd-color
   1702 ?        00:00:00 gsd-datetime
   1703 ?        00:00:00 gsd-housekeepin
   1705 ?        00:00:00 gsd-keyboard
   1719 ?        00:00:00 gsd-media-keys
   1722 ?        00:00:00 gsd-power
   1723 ?        00:00:00 gsd-print-notif
   1724 ?        00:00:00 gsd-rfkill
   1728 ?        00:00:00 gsd-screensaver
   1735 ?        00:00:00 gsd-sharing
   1736 ?        00:00:00 gsd-smartcard
   1752 ?        00:00:00 gsd-sound
   1754 ?        00:00:00 gsd-wacom
   1761 ?        00:00:00 gsd-disk-utilit
   1774 ?        00:00:00 evolution-alarm
   1778 ?        00:00:00 gsd-printer
   1781 ?        00:00:00 vmtoolsd
   1861 ?        00:00:00 ibus-daemon
   1862 ?        00:00:00 gsd-xsettings
   1885 ?        00:00:00 ibus-dconf
   1887 ?        00:00:00 ibus-extension-
   1889 ?        00:00:00 ibus-x11
   1900 ?        00:00:00 ibus-portal
   1919 ?        00:00:00 ibus-engine-sim
   1929 ?        00:00:00 gjs
   1960 ?        00:00:01 gnome-terminal-
   1962 ?        00:00:00 gnome-calendar
   2184 pts/0    00:00:00 bash
   2213 ?        00:00:00 gvfsd-metadata
   2216 ?        00:00:00 update-notifier
   2398 pts/0    00:00:00 ps

    All the example options (-u, -U, -g, -G) can be used for all the tools below.

  4. Filter the ps process list by user with the grep command. 
    $ ps -aef | grep avahi
avahi        746       1  0 07:06 ?        00:00:00 avahi-daemon: running [host.local]
avahi        815     746  0 07:06 ?        00:00:00 avahi-daemon: chroot helper
user        2403    2184  0 07:12 pts/0    00:00:00 grep --color=auto avahi

    The grep command filters process output based on keywords, such as a username.

  5. Show processes for a specific user using the top command. 
    $ top -u user

top - 07:12:59 up 6 min,  1 user,  load average: 0.01, 0.13, 0.09
Tasks: 286 total,   1 running, 285 sleeping,   0 stopped,   0 zombie
%Cpu0  :  0.0 us,  0.0 sy,  0.0 ni,100.0 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
%Cpu1  : 33.3 us,  0.0 sy,  0.0 ni, 66.7 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
MiB Mem :   3894.9 total,   2352.8 free,    866.0 used,    676.0 buff/cache
MiB Swap:    923.2 total,    923.2 free,      0.0 used.   2781.2 avail Mem 

    PID USER      PR  NI    VIRT    RES    SHR S  %CPU  %MEM     TIME+ COMMAND 
   1960 user      20   0  411896  50404  38024 S  33.3   1.3   0:02.06 gnome-+ 
   1423 user      20   0   16196   9704   7424 S   0.0   0.2   0:00.34 systemd 
   1424 user      20   0  102304   3620     24 S   0.0   0.1   0:00.00 (sd-pa+ 
   1430 user       9 -11   90940   5876   4776 S   0.0   0.1   0:00.02 pipewi+ 
   1431 user       9 -11   82964   5888   4872 S   0.0   0.1   0:00.02 pipewi+ 
   1432 user       9 -11 1491348  19356  14788 S   0.0   0.5   0:00.97 pulsea+ 
   1434 user      39  19  521388  24992  16768 S   0.0   0.6   0:00.08 tracke+ 
   1437 user      20   0    9536   6024   4276 S   0.0   0.2   0:00.30 dbus-d+ 
   1439 user      20   0  250204   7368   6428 S   0.0   0.2   0:00.05 gnome-+ 
   1459 user      20   0  249844   8316   7288 S   0.0   0.2   0:00.02 gvfsd   
   1464 user      20   0  379672   6776   6104 S   0.0   0.2   0:00.00 gvfsd-+ 
   1466 user      20   0  325104   9716   8304 S   0.0   0.2   0:00.02 gvfs-u+ 
   1477 user      20   0  245848   6576   6036 S   0.0   0.2   0:00.01 gvfs-g+ 
   1482 user      20   0  563824  41372  34748 S   0.0   1.0   0:00.04 goa-da+ 
   1492 user      20   0  324736   9100   8044 S   0.0   0.2   0:00.01 goa-id+ 
   1499 user      20   0  246732   6908   6188 S   0.0   0.2   0:00.00 gvfs-g+ 
   1503 user      20   0  245664   6548   5936 S   0.0   0.2   0:00.01 gvfs-m+ 
   1509 user      20   0  171612   6252   5724 S   0.0   0.2   0:00.00 gdm-wa+ 
   1511 user      20   0  322952   7748   6884 S   0.0   0.2   0:00.03 gvfs-a+ 
   1517 user      20   0  229916  15500  13832 S   0.0   0.4   0:00.02 gnome-+ 
   1568 user      20   0  100964   4912   4476 S   0.0   0.1   0:00.01 gnome-+

    The top command provides real-time monitoring of processes for a specific user.

    top accepts either -u or -U , but not both at the same time. 

    $ top -u user -U user
top: conflicting process selections (U/p/u)
  6. Display processes for multiple users using the pgrep command. 
    $ pgrep -l -u user -U user
1423 systemd
1424 (sd-pam)
1430 pipewire
1431 pipewire-media-
1432 pulseaudio
1434 tracker-miner-f
1437 dbus-daemon
1439 gnome-keyring-d
1459 gvfsd
1464 gvfsd-fuse
1466 gvfs-udisks2-vo
1477 gvfs-goa-volume
1482 goa-daemon
1492 goa-identity-se
1499 gvfs-gphoto2-vo
1503 gvfs-mtp-volume
1509 gdm-wayland-ses
1511 gvfs-afc-volume
1517 gnome-session-b
1568 gnome-session-c
1576 gnome-session-b
1593 gnome-shell
1597 at-spi-bus-laun
1605 dbus-daemon
1613 Xwayland
1634 xdg-permission-
1636 gnome-shell-cal
1645 evolution-sourc
1652 evolution-calen
1660 dconf-service
1664 evolution-addre
1682 gjs
1684 at-spi2-registr
1694 gvfsd-trash
1699 gsd-a11y-settin
1700 gsd-color
1702 gsd-datetime
1703 gsd-housekeepin
1705 gsd-keyboard
1719 gsd-media-keys
1722 gsd-power
1723 gsd-print-notif
1724 gsd-rfkill
1728 gsd-screensaver
1735 gsd-sharing
1736 gsd-smartcard
1752 gsd-sound
1754 gsd-wacom
1761 gsd-disk-utilit
1774 evolution-alarm
1778 gsd-printer
1781 vmtoolsd
1861 ibus-daemon
1862 gsd-xsettings
1885 ibus-dconf
1887 ibus-extension-
1889 ibus-x11
1900 ibus-portal
1919 ibus-engine-sim
1929 gjs
1960 gnome-terminal-
1962 gnome-calendar
2184 bash
2213 gvfsd-metadata
2216 update-notifier

    The pgrep command lists the process IDs (PIDs) for the given users.

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