How to Kill a process in Linux

kill is the command used to terminate the  process,the kill command can be internal as part of modern shell  or it will be located in...



kill is the command used to terminate the  process,the kill command can be internal as part of modern shell  or it will be located in /bin/kill

The basic syntax to kill the process is the kill command followed by the PID

1.kill - TERM <PID>
2. killall <Process name>


PID 

 
PID is nothing but the process identification number , that is automatically assigned to each process when it is created.
 

The below example shows the running process and their pid's

[root@host-7-113 ~]# ps aux
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root         1  0.3  1.3  52848  6612 ?        Ss   05:17   0:01 /usr/lib/systemd/systemd --switched-root --system --deserialize 23
root         2  0.0  0.0      0     0 ?        S    05:17   0:00 [kthreadd]
root         3  0.0  0.0      0     0 ?        S    05:17   0:00 [ksoftirqd/0]
root         5  0.0  0.0      0     0 ?        S<   05:17   0:00 [kworker/0:0H]
root         6  0.0  0.0      0     0 ?        S    05:17   0:00 [kworker/u2:0]
root         7  0.0  0.0      0     0 ?        S    05:17   0:00 [migration/0]
root         8  0.0  0.0      0     0 ?        S    05:17   0:00 [rcu_bh]
root         9  0.0  0.0      0     0 ?        S    05:17   0:00 [rcuob/0]


Examples:

[root@host-7-113 ~]# ps aux  | grep firefox
root       759  0.0  0.6 299172  3216 ?        Ssl  05:17   0:00 /usr/lib/firefox-3.5.3/firefox

[root@host-7-113 ~]# kill 759
[root@host-7-113 ~]#

[root@host-7-113 ~]# killall -9 firefox
[root@host-7-113 ~]# psg aux | grep firefox

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