How to Kill or End a Process on a Linux Server

To easily kill a process on a linux box, first find the process identifier (PID). Issue a ps aux command.

user@hostname:~$ ps aux
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root         1  0.0  1.4 225152  6828 ?        Ss   Aug21   0:09 /sbin/init
root         2  0.0  0.0      0     0 ?        S    Aug21   0:00 [kthreadd]
root         3  0.0  0.0      0     0 ?        I<   Aug21   0:00 [rcu_gp]
root         4  0.0  0.0      0     0 ?        I<   Aug21   0:00 [rcu_par_gp]
root         6  0.0  0.0      0     0 ?        I<   Aug21   0:00 [kworker/0:0H-kb]
root         9  0.0  0.0      0     0 ?        I<   Aug21   0:00 [mm_percpu_wq]
root        10  0.0  0.0      0     0 ?        S    Aug21   0:00 [ksoftirqd/0]
root        11  0.0  0.0      0     0 ?        I    Aug21   0:01 [rcu_sched]
root        12  0.0  0.0      0     0 ?        S    Aug21   0:00 [migration/0]
root        13  0.0  0.0      0     0 ?        S    Aug21   0:00 [cpuhp/0]
root        14  0.0  0.0      0     0 ?        S    Aug21   0:00 [kdevtmpfs]
root        15  0.0  0.0      0     0 ?        I<   Aug21   0:00 [netns]
root        16  0.0  0.0      0     0 ?        S    Aug21   0:00 [rcu_tasks_kthre]
root        17  0.0  0.0      0     0 ?        S    Aug21   0:00 [kauditd]
root        18  0.0  0.0      0     0 ?        S    Aug21   0:00 [khungtaskd]
root        19  0.0  0.0      0     0 ?        S    Aug21   0:00 [oom_reaper]
root        20  0.0  0.0      0     0 ?        I<   Aug21   0:00 [writeback]
root        21  0.0  0.0      0     0 ?        S    Aug21   0:00 [kcompactd0]
root        22  0.0  0.0      0     0 ?        SN   Aug21   0:00 [ksmd]
root        68  0.0  0.0      0     0 ?        I<   Aug21   0:00 [kintegrityd]
root        69  0.0  0.0      0     0 ?        I<   Aug21   0:00 [kblockd]
root        70  0.0  0.0      0     0 ?        I<   Aug21   0:00 [blkcg_punt_bio]
root        71  0.0  0.0      0     0 ?        I<   Aug21   0:00 [tpm_dev_wq]
root        72  0.0  0.0      0     0 ?        I<   Aug21   0:00 [ata_sff]
root        73  0.0  0.0      0     0 ?        I<   Aug21   0:00 [md]
root        74  0.0  0.0      0     0 ?        I<   Aug21   0:00 [edac-poller]
root        75  0.0  0.0      0     0 ?        I<   Aug21   0:00 [devfreq_wq]
root        76  0.0  0.0      0     0 ?        S    Aug21   0:00 [watchdogd]
root        79  0.0  0.0      0     0 ?        S    Aug21   0:00 [kswapd0]
root        80  0.0  0.0      0     0 ?        S    Aug21   0:00 [ecryptfs-kthrea]
root        82  0.0  0.0      0     0 ?        I<   Aug21   0:00 [kthrotld]
root        83  0.0  0.0      0     0 ?        S    Aug21   0:00 [xenbus]
root        84  0.0  0.0      0     0 ?        S    Aug21   0:00 [xenwatch]

"kill -9 PID" command

To kill PID 84 [xenwatch] then issue a sudo kill -9 84 command.


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