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Instructions for Lab 6 First, a little review on processes How to view processes (6 minutes) On the top of all your documents, always include these items: your name: date: Lab number Repeat the process that you used to save the log file that will be produced by this lab. You can either use the log feature on putty or the script command at the shell prompt. Login to our system and follow these steps while recording your session. Once your session has been recorded. Open your file and next to command prompt, describe what you just have done. i.e. : wmorales@syccuxfs01:~> ps                 << this command shows the running processes PID TTY         TIME CMD 1257 pts/5   00:00:00 bash 1596 pts/5   00:00:00 ps wmorales@syccuxas01:~> Upload your .txt file to the dropbox. Remember the format: Question: in this case the command used, then explain what the command does, then a partial output (using the log feature) of the command. Just like the above example. use ----------- cut ---------- if the output is too long. >>>>>>>>>>>>>>>> start here <<<<<<<<<<<<<<<<< $ ps ax $ ps –ef $ ps aux $ps –ef f $ ps -f -u wmorales <<< it can be user userid $ ps aux --sort=-pcpu,+pmem $ ps aux --sort=-pcpu | head -5 $ ps -f --forest $ ps -e -o pid,uname,pcpu,pmem,comm $ ps -e -o pid,uname=USERNAME,pcpu=CPU_USAGE,pmem,comm $ ps -e -o pid,comm,etime $ watch -n 1 'ps -e -o pid,uname,cmd,pmem,pcpu --sort=-pmem,-pcpu | head -15'

Answer 1

ps ax
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Select all processes except both session leaders with Lift the BSD-style "must have a tty" restriction.

ubuntu 18 (Snapshot 1) [Running] - Oracle VM VirtualBox File Machine View Input Devices Help Activities Terminal 2 Fri 12:01 madhav@siftworkstation: OX File Edit View Search Terminal Help madhav@siftworkstation:-$ man ps madhav@siftworkstation:-$ ps ax PID TTY STAT TIME COMMAND 1 ? Ss 0:13 /sbin/init splash 2 ? S 0:00 [kthreadd] 4 ? I 0:00 [kworker/0:0H] 6 ? I 0:00 [mm_percpu_wa] 7 ? S 0:04 [ksoftirqd/o] 8 ? I 0:02 [rcu_sched] 9 ? I 0:00 [rcu_bh] 10 ? S 0:00 [migration/O] 11 ? S 0:00 [watchdog/o] 12 ? S 0:00 [cpuhp/o] 13 ? S 0:00 [kdevtmpfs] 14 ? I 0:00 [netns] 15 ? S 0:00 [rcu_tasks_kthre] 16 ? S 0:00 [kauditd] 17 ? S 0:00 [khungtaskd] 18 ? S 0:00 [oom_reaper] 19 ? IS 0:00 [writeback] 20 ? S 0:00 [kcompactdo] 21 ? SN 0:00 [ksmd] 22 ? SN 0:00 [khugepaged] 23 ? I< 0:00 [crypto] 24 ? 0:00 [kintegrityd] 25 ? Is 0:00 [kblockd] 26 ? I 0:00 [ata_sff] ܕ. a OUVIRight Ctrl 10:31 PM 31/07/2020 D: 0 U: 108 gi 100%

ps ef
********

-e flag to print all the processes within the system see a more detailed output by using the -f option

ubuntu18 (Snapshot 1) [Running] - Oracle VM VirtualBox File Machine View Input Devices Help Activities - Terminal 2 Fri 12:03 madhav@siftworkstation: OX File Edit View Search Terminal Help root 356 2 0 08:10 ? root 357 2 0 08:10 ? root 358 2 O 08:10 ? root 359 2 08:10 ? root 360 2 0 08:10 ? root 361 2 08:10 ? root 362 2 08:10 ? root 363 2 08:10 ? root 364 2 0 08:10 ? root 365 2 0 08:10 ? root 366 2 0 08:10 ? root 367 2 08:10 ? root 368 2 0 08:10 ? root 369 2 0 08:10 ? root 370 2 0 08:10 ? root 373 2 0 08:10 ? root 374 2 0 08:10 ? root 375 2 0 08:10 ? root 376 2 0 08:10 ? root 377 2 0 08:10 ? root 378 2 0 08:10 ? root 379 2 08:10 ? root 380 2 0 08:10 ? 405 2 0 08:10 ? root 467 2 0 08:10 ? systemd+ 495 1 08:10 ? root 635 1 0 08:10 ? message+ 638 1 0 08:10 ? syslog 659 1 08:10 ? root 660 1 0 08:10 ? daemon 662 1 0 08:10 ? root 663 1 0 08:10 ? EN 00:00:00 [loop2] 00:00:00 [loop3] 00:00:00 [loop4] 00:00:02 [loop5] 00:00:00 [loop6] 00:00:00 [loop7] 00:00:00 [loop8] 00:00:00 [loop9] 00:00:00 [loop10] 00:00:00 [loop11] 00:00:00 [loop12] 00:00:00 [loop13] 00:00:00 [loop14] 00:00:00 [loop15] 00:00:00 [loop16] 00:00:00 [loop17] 00:00:00 [loop18] 00:00:00 [loop19] 00:00:00 [loop20] 00:00:00 [loop21] 00:00:00 [loop22] 00:00:00 [jbd2/loop17-8] 00:00:00 [ext4-rsv-conver] 00:00:00 [iprt-VBoxWQueue] 00:00:00 [ttm_swap] 00:00:10 /lib/systemd/systemd-resolved 00:00:00 /usr/lib/udisks2/udisksd 00:00:11 /usr/bin/dbus-daemon --system --address-systemd: --nofork --nopidfile --systend-activation --S 00:00:01 /usr/sbin/rsyslogd -n 00:00:00 /lib/systend/systemd-logind 00:00:00 /usr/sbin/atd -f 00:00:06 /usr/sbin/NetworkManager --no-daemon OUVIRight Ctrl 10:33 PM U: 1.4K 100% LIL 31/07/2020 ? root D: 876 gi

ps aux
***********

Х 2 OX Hubuntu 18 (Snapshot 1) [Running] - Oracle VM VirtualBox File Machine View Input Devices Help Activities Terminal Fri 12:04 madhav@siftworkstation: - File Edit View Search Terminal Help postfix 4325 13500 12:00 ? 00:00:00 pickup -l -t unix -u -C madhav 4362 2562 0 12:01 pts/0 00:00:00 ps -ef madhav@siftworkstation: $ ps aux USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 1 0.0 0.3 225880 6292 ? Ss 08:10 0:13 /sbin/init splash root 2 0.0 0.0 0 ? S 08:10 0:00 [kthreadd] root 4 0.0 0.0 0 0? I 08:10 0:00 [kworker/0:0H] root 6 0.0 0.0 0? Is 08:10 0:00 [mm_percpu_wq] root 7 0.0 0.0 0 ? S 08:10 0:04 [ksoftirad/O] root 8 0.0 0.0 0 0? I 08:10 0:02 [rcu_sched] root 9 0.0 0.0 0 O ? I 08:10 0:00 [rcu_bh] root 10 0.0 0.0 0 0? S 08:10 0:00 [migration/0] root 11 0.0 0.0 0 ? S 08:10 0:00 [watchdog/o] root 12 0.0 0.0 0? S 08:10 0:00 [cpuhp/o] root 13 0.0 0.0 ? S 08:10 0:00 [kdevtmpfs] root 14 0.0 0.0 0? I 08:10 0:00 [netns] EN root 15 0.0 0.0 0 O ? S 08:10 0:00 [rcu_tasks_kthre] root 16 0.0 0.0 0 0? S 08:10 0:00 [kauditd] root 17 0.0 0.0 0 0? S 08:10 0:00 [khungtaskd] root 18 0.0 0.0 0 S 08:10 0:00 [oom_reaper] root 19 0.0 0.0 0 0? I 08:10 0:00 [writeback] root 20 0.0 0.0 0? S 08:10 0:00 [kcompactdo] root 21 0.0 0.0 0 0? SN 08:10 0:00 [ksmd] 22 0.0 0.0 SN 08:10 0:00 [khugepaged] root 23 0.0 0.0 0 O ? IS 08:10 0:00 [crypto] root 24 0.0 0.0 O 0? I 08:10 0:00 [kintegrityd] root 25 0.0 0.0 ? I 08:10 a 0:00 [kblockd] root 26 0.0 0.0 ? Ις 08:10 0:00 [ata_sff] root 27 0.0 0.0 0? I 08:10 0:00 [md] root 28 0.0 0.0 0? I 08:10 0:00 [edac-poller] root 29 0.0 0.0 ? I 08:10 0:00 [devfreq_wa] root 30 0.0 0.0 0 ? I 08:10 0:00 [watchdogd] ? root D: 564 OUVIRight Ctrl 10:34 PM 31/07/2020 It V: 2.5K 100% 12

ps –ef f
**********

ubuntu18 (Snapshot 1) [Running] - Oracle VM VirtualBox File Machine View Input Devices Help Activities Terminal 2 Fri 12:05 madhav@siftworkstation: - OX 11:59 11:59 I I S R+ 0:00 [kworker/u2:0] 0:00 [kworker/u2:3] 0:00 pickup -1 -t unix -u -C 0:00 ps aux 12:00 12:04 File Edit View Search Terminal Help root 4257 0.0 0.0 0 ? root 4258 0.0 0.0 ? postfix 4325 0.0 0.2 73816 5268 ? madhav 4364 0.0 0.1 44476 3464 pts/0 madhav@siftworkstation:-$ps -ef f UID PID PPID C STIME TTY STAT root 2 0 0 08:10 ? S root 4 2 08:10 ? I root 6 2 0 08:10 ? I root 7 2 0 08:10 ? S root 8 2 0 08:10 ? I root 9 2 0 08:10 ? I root 10 2 0 08:10 ? S root 11 2 0 08:10 ? S root 12 2 08:10 ? S root 13 2 0 08:10 ? S root 14 2 0 08:10 ? I root 15 2 0 08:10 ? S root 16 2 08:10 ? S 17 2 0 08:10 ? S root 18 2 0 08:10 ? S root 19 2 08:10 ? I root 20 2 0 08:10 ? S root 21 2 0 08:10 ? SN root 22 2 0 08:10 ? SN root 23 2 0 08:10 ? I root 24 20 08:10 ? I root 25 2 0 08:10 ? I root 26 2 0 08:10 ? I root 27 2 08:10 ? I root 28 2 0 08:10 ? I root 29 2 0 08:10 ? I EN 0:00 TIME CMD 0:00 [kthreadd] 0:00 [kworker/0:0H] 0:00 [mm_percpu_wq] 0:04 [ksoftirqd/oj 0:02 [rcu_sched] 0:00 [rcu_bh] 0:00 |_ [migration/0] 0:00 |_ [watchdog/] 0:00 [cpuhp/0] 0:00 [kdevtmpfs] 0:00 |_ [netns] 1 [rcu_tasks_kthre] 0:00 [kauditd] 0:00 [khungtaskd] 0:00 |_ [oom_reaper] 0:00 [writeback] 0:00 [kcompactdo] 0:00 [ksmd] 0:00 1 [khugepaged] 0:00 |_ [crypto] 0:00 _ [kintegrityd] 0:00 [kblockd] 0:00 |_ [ata_sff] 0:00 |_ [md] 0:00 [edac-poller] 0:00 |_ [devfreq_wq] root OUVIRight Ctrl 10:35 PM 31/07/2020 D: 840 U: 465 gi 100% 01

ps -f -u <username>
************************

PID 1472 1 Hubuntu 18 (Snapshot 1) [Running] - Oracle VM VirtualBox File Machine View Input Devices Help Activities Terminal Fri 12:05 2 madhav@siftworkstation: OX File Edit View Search Terminal Help madhav@siftworkstation:~$ ps -f -U madhav UID PPID C STIME TTY TIME CMD madhav 1269 1 0 08:10 ? 00:00:00 /lib/systemd/systemd --user madhav 1271 1269 0 08:10 ? 00:00:00 (sd-pam) madhav 1355 1 0 08:10 ? 00:00:00 /usr/bin/gnome-keyring-daemon --daemonize -- login madhav 1359 1223 0 08:10 tty1 00:00:00 /usr/lib/gdm3/gdm-X-session --run-script env GNOME_SHELL_SESSION_MODE=ubuntu gnome-session --S madhav 1361 1359 0 08:10 tty1 00:00:27 /usr/lib/xorg/Xorg vti -displayfd 3 -auth /run/user/1000/gdm/Xauthority -background none -nore madhav 1365 1269 0 08:10 ? 00:00:01 /usr/bin/dbus-daemon --session --address=systemd: --nofork --nopidfile --systemd-activation -- madhav 1369 1359 0 08:10 tty1 00:00:00 /usr/lib/gnome-session/gnome-session-binary --session=ubuntu madhav 1 O 08:10 ? 00:00:00 /usr/bin/VBoxclient --clipboard madhav 1473 1472 0 08:10 ? 00:00:00 /usr/bin/VBoxClient --clipboard madhav 1482 0 08:10 ? 00:00:00 /usr/bin/VBoxclient --display madhav 1483 1482 0 08:10 ? 00:00:00 /usr/bin/VBoxclient --display madhav 1487 1 0 08:10 ? 00:00:00 /usr/bin/VBoxclient --seamless madhav 1488 1487 0 08:10 ? 00:00:00 /usr/bin/VBoxclient --seamless madhav 1494 1 0 08:10 ? 00:00:00 /usr/bin/VBoxclient --draganddrop madhav 1495 1494 0 08:10 ? 00:00:31 /usr/bin/VBoxclient --draganddrop madhav 1509 1369 0 08:10 ? 00:00:00 /usr/bin/ssh-agent /usr/bin/im-launch env GNOME_SHELL_SESSION_MODE=ubuntu gnome-session --sess madhav 1511 1269 0 08:10 ? 00:00:00 /usr/lib/at-spi2-core/at-spi-bus-launcher madhav 1516 1511 0 08:10 ? 00:00:00 /usr/bin/dbus-daemon --config-file=/usr/share/defaults/at-spi2/accessibility.conf --nofork --P madhav 1519 1269 O 08:10 ? 00:00:00 /usr/lib/at-spi2-core/at-spi2-registryd --use-gnome-session madhav 1600 1369 O 08:10 tty1 00:01:39 /usr/bin/gnome-shell madhav 1692 1269 0 08:10 ? 00:00:00 /usr/lib/gifs/gvfsd madhav 1697 1269 O 08:10 ? 00:00:00 /usr/lib/gvfs/gvfsd-fuse /run/user/1000/gvfs -f -o big_writes madhav 1708 0 08:10 ? 00:01:31 /usr/bin/pulseaudio --start --log-target=syslog madhav 1727 1600 0 08:10 tty1 00:00:02 ibus-daemon --xim --panel disable madhav 1731 1727 a 08:10 tty1 00:00:00 /usr/lib/ibus/ibus-dconf madhav 0 08:10 tty1 00:00:00 /usr/lib/ibus/ibus -x11 --kill-daemon madhav 1737 1269 O 08:10 ? 00:00:00 /usr/lib/ibus/ibus-portal madhav 1747 1269 O 08:10 ? 00:00:00 /usr/lib/gnome-shell/gnome-shell-calendar-server madhav 1753 1269 0 08:10 ? 00:00:00 /usr/lib/evolution/evolution-source-registry madhav 1759 1269 0 08:10 ? 00:00:00 /usr/lib/gnome-online-accounts/goa-daemon 09Right Ctrl D: 137 10:35 PM U: 411 100% 31/07/2020 1 1733 1 TH

ps aux --sort=-pcpu,+pmem
********************************

show all user's process with sort via process cpu and process memory

1708 0.1 Hubuntu 18 (Snapshot 1) [Running] - Oracle VM VirtualBox File Machine View Input Devices Help Activities - Terminal Fri 12:06 madhav@siftworkstation:- File Edit View Search Terminal Help madhav 3200 1 0 08:41 ttyi 00:00:02 /usr/lib/speech-dispatcher-modules/sd_espeak-ng /etc/speech-dispatcher/modules/espeak-ng.conf madhav 3206 1 08:41 ? 00:00:00 /usr/bin/speech-dispatcher --spawn --communication method unix_socket --Socket-path /run/user/ madhav 4373 2562 0 12:05 pts/0 00:00:00 ps -f -U madhav madhav@siftworkstation:~$ ps aux --sort=-pcpu,+pmem madhav@siftworkstation:~$ ps aux --sort=-pcpu,+pmem USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND madhav 2846 3.9 16.9 3973100 346280 tty1 Sl+ 08:36 8:22 /usr/lib/firefox/firefox -new-window root 34 1.5 0.0 O ? S 08:10 3:37 [kswapdo] madhav 1600 0.7 8.6 2988524 177336 tty1 Rl+ 08:10 1:40 /usr/bin/gnome-shell madhav 0.6 0.1 2652064 2928 ? S<l 08:10 1:32 /usr/bin/pulseaudio --start --log-target=syslog madhav 1495 0.2 0.0 125776 O ? sl 08:10 0:31 /usr/bin/VBoxclient --draganddrop root 1804 0.2 2.8 521732 57160 ? Ssl 08:10 0:28 /usr/lib/packagekit/packagekitd snort 1724 0.1 0.9 598572 19844 ? Ssl 08:10 0:17 /usr/sbin/snort -m 027 -D -d -1 /var/log/snort -U snort -9 snort -c /etc/snor madhav 1361 2.4 433060 49212 tty1 Sl+ 08:10 0:27 /usr/lib/xorg/Xorg vti -displayfd 3 -auth /run/user/1000/gdm/Xauthority -back madhav 2937 0.1 4.0 2618412 81976 tty1 Sl+ 08:36 0:13 /usr/lib/firefox/firefox -contentproc -childID 2 -isForBrowser -prefslen 6325 madhav 1919 0.1 6.2 1136428 128444 tty1 SLl+ 08:10 0:17 /usr/bin/gnome-software --gapplication-service root 2 0.0 0.0 0? S 08:10 0:00 [kthreadd] root 0.0 0.0 0 O ? I 08:10 0:00 [kworker/0:0H] root 6 0.0 0.0 0 0? I 08:10 0:00 [mm_percpu_wq] root 7 0.0 0.0 08:10 0:04 [ksoftirqd/o] root 8 0.0 0.0 ? I 08:10 0:02 [rcu_sched] root 9 0.0 0.0 0? I 08:10 0:00 [rcu_bh] root 10 0.0 0.0 0 ? S 08:10 0:00 [migration/O] root 11 0.0 0.0 O ? S 08:10 0:00 [watchdog/o] root 12 0.0 0.0 0 ? S 08:10 0:00 [cpuhp/o] root 13 0.0 0.0 0 0? S 08:10 0:00 [kdevtmpfs] root 14 0.0 0.0 0? I 08:10 0:00 [netns] root 15 0.0 0.0 08:10 0:00 [rcu_tasks_kthre] root 16 0.0 0.0 ? S 08:10 0:00 [kauditd] root 17 0.0 0.0 O ? S 08:10 0:00 [khungtaskd] root 18 0.0 0.0 ? S 08:10 0:00 [oom_reaper] root 19 0.0 0.0 © O ? I 08:10 0:00 [writeback] 09Right Ctrl D: 212 It U: 713 100% 31/07/2020 EN 10:36 PM gi

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

will show only top 5 processes

ubuntu18 (Snapshot 1) [Running] - Oracle VM VirtualBox File Machine View Input Devices Help Activities - Terminal - 2 Fri 12:07 madhav@siftworkstation:- OX File Edit View Search Terminal Help madhav@siftworkstation:-$ ps aux --sort=-pcpu | head -5 USER PID %CPU %MEM VSZ RSS TTY STAT START madhav 2846 3.9 16.9 3973100 346248 tty1 Sl+ 08:36 root 34 1.5 0.0 O ? S 08:10 madhav 1600 0.7 8.6 2988524 177328 tty1 Rl+ 08:10 madhav 1708 0.6 0.1 2652064 2928 ? S<l 08:10 madhav@siftworkstation:~$ TIME COMMAND 8:22 /usr/lib/firefox/firefox-new-window 3:37 [kswapdo] 1:42 /usr/bin/gnome-shell 1:32 /usr/bin/pulseaudio --start --log-target=syslog a 09Right Ctrl 10:37 PM 31/07/2020 D: 6.2 K U: 9.6K gi 100%

ps -f --forest
*****************

2 OX ubuntu18 (Snapshot 1) [Running] - Oracle VM VirtualBox File Machine View Input Devices Help Activities - Terminal - Fri 12:08 madhav@siftworkstation:- File Edit View Search Terminal Help madhav@siftworkstation:-$ ps aux --sort=-pcpu head - 5 USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND madhav 2846 3.9 16.9 3973100 346248 tty1 Sl+ 08:36 8:22 /usr/lib/firefox/firefox-new-window root 34 1.5 0.0 O ? S 08:10 3:37 [kswapdo] madhav 1600 0.7 8.6 2988524 177328 tty1 Rl+ 08:10 1:42 /usr/bin/gnome-shell madhav 1708 0.6 0.1 2652064 2928 ? S<l 08:10 1:32 /usr/bin/pulseaudio --start --log-target=syslog madhav@siftworkstation: $ ps -f --forest UID PID PPID C STIME TTY TIME CMD madhav 2562 2552 08:19 pts/ 00:00:00 bash madhav 4384 2562 12:07 pts/O 00:00:00 |_ ps -f .- forest madhav@siftworkstation:-$ | a 09Right Ctrl 10:38 PM 31/07/2020 D: 11 K U: 13 K gi 100%

ps -e -o pid,uname,pcpu,pmem,comm
**********************************************

ubuntu 18 (Snapshot 1) [Running] - Oracle VM VirtualBox File Machine View Input Devices Help Activities Terminal Fri 12:08 madhav@siftworkstation:- File Edit View Search Terminal Help madhav 2950 0.0 1.9 2580844 40372 tty1 Sl+ 08:36 0:12 /usr/lib/firefox/firefox -contentproc -childID 3 -isForBrowser -prefsLen 6325 madhav@siftworkstation:-$ ps aux --sort=-pcpu head -5 madhav@siftworkstation:-$ ps aux --sort=-pcpu | head - 5 USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND madhav 2846 3.9 16.9 3973100 346248 tty1 Sl+ 08:36 8:22 /usr/lib/firefox/firefox -new-window root 34 1.5 0.0 S 08:10 3:37 [kswapdo] madhav 1600 0.7 8.6 2988524 177328 tty1 Rl+ 08:10 1:42 /usr/bin/gnome-shell madhav 1708 0.6 0.1 2652064 2928 ? skl 08:10 1:32 /usr/bin/pulseaudio --start --log-target=syslog madhav@siftworkstation :-$ ps -f --forest UID PID PPID C STIME TTY TIME CMD madhav 2562 2552 08:19 pts/0 00:00:00 bash madhav 4384 2562 12:07 pts/ 00:00:00 |_ ps -f --forest madhav@siftworkstation:-$ps -e -o pid, uname, pcpu, pmem, comm PID USER %CPU %MEM COMMAND 1 root 0.0 0.3 systemd 2 root 0.0 0.0 kthreadd 4 root 0.0 0.0 kworker/0:0H 6 root 0.0 0.0 mm_percpu_wq 7 root 0.0 0.0 ksoftirqd/0 8 root 0.0 0.0 rcu_sched 9 root 0.0 0.0rcu_bh 10 root 0.0 0.0 migration/ 11 root 0.0 0.0 watchdog/ ? 12 root 0.0 0.0 cpuhp/0 13 root 0.0 0.0 kdevtmpfs 14 root 0.0 0.0 netns 15 root 0.0 a 0.0 rcu_tasks_kthre 16 root 0.0 0.0 kauditd 17 root 0.0 0.0 khungtaskd 18 root 0.0 0.0 oom_reaper 19 root 0.0 0.0 writeback 20 root 0.0 0.0 kcompactdo OUVIRight Ctrl D: 3.7 K 10:38 PM TH U: 1.1 K 100% 31/07/2020

ps -e -o pid,uname=USERNAME,pcpu=CPU_USAGE,pmem,comm
******************************************************************************

sort by username and cpu usage with ascending order of processes

2 OX ubuntu 18 (Snapshot 1) [Running] - Oracle VM VirtualBox File Machine View Input Devices Help Activities Terminal Fri 12:08 madhav@siftworkstation: - File Edit View Search Terminal Help madhav@siftworkstation:-$ ps -e -o pid, uname=USERNAME ,PCPU=CPU_USAGE , pmem, comm PID USERNAME CPU_USAGE %MEM COMMAND 1 root 0.0 0.3 systemd 2 root 0.0 0.0 kthreadd 4 root 0.0 0.0 kworker/0:0H 6 root 0.0 0.0 mm_percpu_wq 7 root 0.0 0.0 ksoftirqd/0 8 root 0.0 0.0rcu sched 9 root 0.0 0.0 rcu_bh 10 root 0.0 0.0 migration/ 11 root 0.0 0.0 watchdog/ 12 root 0.0 0.0 cpuhp/ 13 root 0.0 0.0 kdevtmpfs 14 root 0.0 0.0 netns 15 root 0.0 0.0 rcu_tasks_kthre 16 root 0.0 0.0 kauditd 17 root 0.0 0.0 khungtaskd 18 root 0.0 0.0 oom_reaper 19 root 0.0 0.0 writeback 20 root 0.0 0.0 kcompactdo 21 root 0.0 0.0 ksmd 22 root 0.0 0.0 khugepaged 23 root 0.0 0.0 crypto ? 24 root 0.0 0.0 kintegrityd 25 root 0.0 0.0 kblockd 26 root 0.0 0.0 ata_sff 27 root 0.0 0.0 md a 28 root 0.0 0.0 edac-poller 29 root 0.0 0.0 devfreq_wq 30 root 0.0 0.0 watchdogd 32 root 0.0 0.0 kworker/0:1 34 root 1.5 0.0 kswapdo D: 11 K U: 5.2 K 09Right Ctrl 10:38 PM 31/07/2020 100%

ps -e -o pid,comm,etime
*******************************

since process started show by elpsed time column

ubuntu18 (Snapshot 1) [Running] - Oracle VM VirtualBox File Machine View Input Devices Help Activities Terminal 2 Fri 12:09 madhav@siftworkstation: OX File Edit View Search Terminal Help madhav@siftworkstation: ps -e -o pid, comm,etime PID COMMAND ELAPSED 1 systemd 03:59:43 2 kthreadd 03:59:43 4 kworker/0:0H 03:59:43 6 mm_percpu_Wq 03:59:43 7 ksoftirqd/0 03:59:43 8 rcu_sched 03:59:43 9 rcu_bh 03:59:43 10 migration/ 03:59:43 11 watchdog/0 03:59:43 12 cpuhp/ 03:59:43 13 kdevtmpfs 03:59:43 14 netns 03:59:43 15 rcu_tasks_kthre 03:59:43 16 kauditd 03:59:43 17 khungtaskd 03:59:43 18 oom_reaper 03:59:43 19 writeback 03:59:43 20 kcompactdo 03:59:43 21 ksmd 03:59:43 22 khugepaged 03:59:43 23 crypto 03:59:43 24 kintegrityd 03:59:43 25 kblockd 03:59:43 26 ata_sff 03:59:43 27 md 03:59:43 28 edac-poller 03:59:43 29 devfreq_wq 03:59:43 30 watchdogd 03:59:43 32 kworker/0:1 03:59:43 34 kswapdo 03:59:41 ? a D: 14 K U: 7.1 K OvRight Ctrl 10:39 PM 31/07/2020 j 100% E

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

sort by process with each process time interval changes of 1 sec

ubuntu18 (Snapshot 1) [Running] - Oracle VM VirtualBox File Machine View Input Devices Help Activities Terminal Fri 12:11 madhav@siftworkstation: - File Edit View Search Terminal Help Every 1.0s: ps -e -o pid, uname, cmd, pmem, pcpu --sort=-prem, -pcpu | head -15 siftworkstation: Fri Jul 31 12:11:17 2020 PID USER 2846 madhav 1600 madhav 1919 madhav 2937 madhav 1804 root 1361 madhav 2950 madhav 3415 root 1119 root 2552 madhav 3162 madhav 1724 snort 1924 madhav 281 root CMD %MEM %CPU /usr/lib/firefox/firefox -n 17.1 3.9 /usr/bin/gnome-shell 8.6 0.7 /usr/bin/gnome-software --9 6.2 0.1 /usr/lib/firefox/firefox-c 4.0 0.1 /usr/lib/packagekit/package 2.8 0.1 /usr/lib/xorg/Xorg vti -dis 2.4 0.2 /usr/lib/firefox/firefox-c 2.1 0.0 /usr/lib/snapd/snapd 1.2 0.0 /usr/sbin/apache2-k start 1.2 0.0 /usr/lib/gnome-terminal/gno 1.1 0.0 /usr/lib/firefox/firefox-c 0.9 0.0 /usr/sbin/snort -m 027 -D - 0.9 0.1 nautilus-desktop 0.6 0.0 /lib/systemd/systemd-journa 0.6 0.0 a gi D: 529 U: 492 OUVIRight Ctrl 10:41 PM 31/07/2020 100%

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