celina@ubuntuserver:~/celina/test$ ./loop
^Z
[1]+ Stopped ./loop
celina@ubuntuserver:~/celina/test$ ./loop
^Z
[2]+ Stopped ./loop
celina@ubuntuserver:~/celina/test$ ./loop
^Z
[3]+ Stopped ./loop
celina@ubuntuserver:~/celina/test$ ./loop &
[4] 5756
celina@ubuntuserver:~/celina/test$ jobs
[1] Stopped ./loop
[2]- Stopped ./loop
[3]+ Stopped ./loop
[4] Running ./loop &
celina@ubuntuserver:~/celina/test$ ps
PID TTY TIME CMD
1261 pts/0 00:00:00 bash
5743 pts/0 00:00:02 loop
5748 pts/0 00:00:01 loop
5751 pts/0 00:00:01 loop
5939 pts/0 00:00:00 ps
celina@ubuntuserver:~/celina/test$ ps -aux
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 1.1 102092 11548 ? Ss 03:41 0:01 /sbin/init ma
root 2 0.0 0.0 0 0 ? S 03:41 0:00 [kthreadd]
root 3 0.0 0.0 0 0 ? I< 03:41 0:00 [rcu_gp]
root 4 0.0 0.0 0 0 ? I< 03:41 0:00 [rcu_par_gp]
root 6 0.0 0.0 0 0 ? I< 03:41 0:00 [kworker/0:0H
root 9 0.0 0.0 0 0 ? I< 03:41 0:00 [mm_percpu_wq
root 10 0.0 0.0 0 0 ? S 03:41 0:00 [ksoftirqd/0]
root 11 0.0 0.0 0 0 ? I 03:41 0:01 [rcu_sched]
root 12 0.0 0.0 0 0 ? S 03:41 0:00 [migration/0]
root 13 0.0 0.0 0 0 ? S 03:41 0:00 [idle_inject/
root 14 0.0 0.0 0 0 ? S 03:41 0:00 [cpuhp/0]
root 15 0.0 0.0 0 0 ? S 03:41 0:00 [kdevtmpfs]
root 16 0.0 0.0 0 0 ? I< 03:41 0:00 [netns]
root 17 0.0 0.0 0 0 ? S 03:41 0:00 [rcu_tasks_kt
root 18 0.0 0.0 0 0 ? S 03:41 0:00 [kauditd]
root 19 0.0 0.0 0 0 ? S 03:41 0:00 [khungtaskd]
root 20 0.0 0.0 0 0 ? S 03:41 0:00 [oom_reaper]
root 21 0.0 0.0 0 0 ? I< 03:41 0:00 [writeback]
root 22 0.0 0.0 0 0 ? S 03:41 0:00 [kcompactd0]
root 23 0.0 0.0 0 0 ? SN 03:41 0:00 [ksmd]
root 24 0.0 0.0 0 0 ? SN 03:41 0:00 [khugepaged]
root 70 0.0 0.0 0 0 ? I< 03:41 0:00 [kintegrityd]
root 71 0.0 0.0 0 0 ? I< 03:41 0:00 [kblockd]
root 72 0.0 0.0 0 0 ? I< 03:41 0:00 [blkcg_punt_b
root 73 0.0 0.0 0 0 ? I< 03:41 0:00 [tpm_dev_wq]
root 74 0.0 0.0 0 0 ? I< 03:41 0:00 [ata_sff]
root 75 0.0 0.0 0 0 ? I< 03:41 0:00 [md]
root 76 0.0 0.0 0 0 ? I< 03:41 0:00 [edac-poller]
root 77 0.0 0.0 0 0 ? I< 03:41 0:00 [devfreq_wq]
root 78 0.0 0.0 0 0 ? S 03:41 0:00 [watchdogd]
root 79 0.0 0.0 0 0 ? I 03:41 0:00 [kworker/u2:1
root 81 0.0 0.0 0 0 ? S 03:41 0:00 [kswapd0]
root 82 0.0 0.0 0 0 ? S 03:41 0:00 [ecryptfs-kth
root 84 0.0 0.0 0 0 ? I< 03:41 0:00 [kthrotld]
root 85 0.0 0.0 0 0 ? I< 03:41 0:00 [acpi_thermal
root 86 0.0 0.0 0 0 ? S 03:41 0:00 [scsi_eh_0]
root 87 0.0 0.0 0 0 ? I< 03:41 0:00 [scsi_tmf_0]
root 88 0.0 0.0 0 0 ? S 03:41 0:00 [scsi_eh_1]
root 89 0.0 0.0 0 0 ? I< 03:41 0:00 [scsi_tmf_1]
root 91 0.0 0.0 0 0 ? I< 03:41 0:00 [vfio-irqfd-c
root 93 0.0 0.0 0 0 ? I< 03:41 0:00 [ipv6_addrcon
root 102 0.0 0.0 0 0 ? I< 03:41 0:00 [kstrp]
root 105 0.0 0.0 0 0 ? I< 03:41 0:00 [kworker/u3:0
root 118 0.0 0.0 0 0 ? I< 03:41 0:00 [charger_mana
root 119 0.0 0.0 0 0 ? I< 03:41 0:00 [kworker/0:1H
root 155 0.0 0.0 0 0 ? S 03:41 0:00 [scsi_eh_2]
root 156 0.0 0.0 0 0 ? I< 03:41 0:00 [scsi_tmf_2]
root 157 0.0 0.0 0 0 ? I< 03:41 0:00 [cryptd]
root 190 0.0 0.0 0 0 ? S 03:41 0:00 [irq/18-vmwgf
root 192 0.0 0.0 0 0 ? I< 03:41 0:00 [ttm_swap]
root 206 0.0 0.0 0 0 ? I< 03:41 0:00 [kdmflush]
root 232 0.0 0.0 0 0 ? I< 03:41 0:00 [raid5wq]
root 279 0.0 0.0 0 0 ? S 03:41 0:00 [jbd2/dm-0-8]
root 280 0.0 0.0 0 0 ? I< 03:41 0:00 [ext4-rsv-con
root 351 0.0 3.2 84452 32260 ? S<s 03:41 0:00 /lib/systemd/
root 383 0.0 0.5 21568 5424 ? Ss 03:41 0:00 /lib/systemd/
root 398 0.0 0.0 0 0 ? I< 03:41 0:00 [iprt-VBoxWQu
root 531 0.0 0.0 0 0 ? I< 03:41 0:00 [kaluad]
root 532 0.0 0.0 0 0 ? I< 03:41 0:00 [kmpath_rdacd
root 533 0.0 0.0 0 0 ? I< 03:41 0:00 [kmpathd]
root 534 0.0 0.0 0 0 ? I< 03:41 0:00 [kmpath_handl
root 535 0.0 1.8 280308 18112 ? SLsl 03:41 0:00 /sbin/multipa
root 549 0.0 0.0 0 0 ? S< 03:41 0:00 [loop0]
root 554 0.0 0.0 0 0 ? S< 03:41 0:00 [loop1]
root 555 0.0 0.0 0 0 ? S< 03:41 0:00 [loop2]
root 556 0.0 0.0 0 0 ? S< 03:41 0:00 [loop3]
root 558 0.0 0.0 0 0 ? S 03:41 0:00 [jbd2/sda2-8]
root 559 0.0 0.0 0 0 ? S< 03:41 0:00 [loop4]
root 560 0.0 0.0 0 0 ? I< 03:41 0:00 [ext4-rsv-con
root 561 0.0 0.0 0 0 ? S< 03:41 0:00 [loop5]
root 562 0.0 0.0 0 0 ? S< 03:41 0:00 [loop6]
systemd+ 575 0.0 0.6 90424 6380 ? Ssl 03:41 0:00 /lib/systemd/
systemd+ 630 0.0 0.7 26804 7888 ? Ss 03:42 0:00 /lib/systemd/
systemd+ 632 0.0 1.2 24092 12284 ? Ss 03:42 0:00 /lib/systemd/
root 644 0.0 0.7 234456 7420 ? Ssl 03:42 0:00 /usr/lib/acco
root 647 0.0 0.2 5568 2820 ? Ss 03:42 0:00 /usr/sbin/cro
message+ 648 0.0 0.4 7496 4420 ? Ss 03:42 0:00 /usr/bin/dbus
root 653 0.0 1.7 26308 17292 ? Ss 03:42 0:00 /usr/bin/pyth
syslog 654 0.0 0.4 224500 4684 ? Ssl 03:42 0:00 /usr/sbin/rsy
root 655 0.2 8.1 827960 82052 ? Ssl 03:42 0:05 dockerd --gro
root 657 0.0 3.3 629956 33344 ? Ssl 03:42 0:01 /usr/lib/snap
root 659 0.0 0.8 17068 8040 ? Ss 03:42 0:00 /lib/systemd/
daemon 663 0.0 0.2 3792 2240 ? Ss 03:42 0:00 /usr/sbin/atd
root 670 0.0 0.3 5992 3736 tty1 Ss 03:42 0:00 /bin/login -p
root 698 0.0 0.6 12176 6740 ? Ss 03:42 0:00 sshd: /usr/sb
root 709 0.0 0.6 232716 6812 ? Ssl 03:42 0:00 /usr/lib/poli
root 716 0.0 1.9 105128 19648 ? Ssl 03:42 0:00 /usr/bin/pyth
root 869 0.1 4.8 764072 48464 ? Ssl 03:42 0:03 containerd --
root 888 0.0 0.0 2488 584 ? S 03:42 0:00 bpfilter_umh
celina 1152 0.0 0.9 18700 10024 ? Ss 03:42 0:00 /lib/systemd/
celina 1153 0.0 0.3 103448 3472 ? S 03:42 0:00 (sd-pam)
celina 1158 0.0 0.4 7068 4068 tty1 S+ 03:42 0:00 -bash
root 1175 0.0 0.8 13924 8696 ? Ss 03:43 0:00 sshd: celina
celina 1260 0.0 0.5 14056 5784 ? S 03:43 0:00 sshd: celina@
celina 1261 0.0 0.4 7192 4800 pts/0 Ss 03:43 0:00 -bash
root 5644 0.0 0.0 0 0 ? I 03:55 0:00 [kworker/u2:2
root 5672 0.0 0.0 0 0 ? I 03:56 0:00 [kworker/0:1-
celina 5743 0.3 0.0 2356 524 pts/0 T 04:05 0:02 ./loop
celina 5748 0.2 0.0 2356 524 pts/0 T 04:06 0:01 ./loop
celina 5751 0.1 0.0 2356 592 pts/0 T 04:06 0:01 ./loop
root 5851 0.0 0.0 0 0 ? I 04:14 0:00 [kworker/0:2-
root 5908 0.0 0.0 0 0 ? I 04:19 0:00 [kworker/u2:0
celina 5922 0.0 0.3 7844 3484 pts/0 R+ 04:21 0:00 ps -aux