Linux学习28-linux一行命令杀掉指定名称进程(killall 、kill 、pkill)
作者:互联网
前言
常见面试题:如何用一句 linux 指令,查找到指定名称的进程并杀掉
常用的杀进程的三个指令:killall 、kill 、pkill
杀进程几种方式
killall命令用于杀死指定名字的进程(kill processes by name)
killall [参数] [进程名]
kill命令杀死指定进程PID的进程
kill [参数] [进程id]
pkill 和killall差不多,也是用于杀掉指定名称的进程
pkill [参数] [进程名]
killall
先用ps查找出需要杀掉的进程
ps -ef |grep 进程名称
比如我想杀掉 httpd 的进程
[root@VM_0_2_centos opt]# ps -ef | grep httpd
root 21982 21885 0 21:06 ? 00:00:00 /opt/zbox/run/apache/httpd -k start
65534 21983 21982 0 21:06 ? 00:00:00 /opt/zbox/run/apache/httpd -k start
65534 21984 21982 0 21:06 ? 00:00:00 /opt/zbox/run/apache/httpd -k start
65534 21999 21982 0 21:06 ? 00:00:00 /opt/zbox/run/apache/httpd -k start
root 22321 19229 0 21:06 pts/0 00:00:00 grep --color=auto httpd
查找出来的进程很多,如果想一次性杀掉,可以用killall
killall -9 httpd
再去查看进程就被杀掉了
[root@VM_0_2_centos opt]# killall -9 httpd
[root@VM_0_2_centos opt]# ps -ef | grep httpd
root 22781 19229 0 21:08 pts/0 00:00:00 grep --color=auto httpd
pkill
pkill 和 killall用法差不多,也是根据进程名称来杀掉全部
pkill -9 httpd
[root@VM_0_2_centos opt]# ps -ef | grep httpd
root 23284 23216 0 21:09 ? 00:00:00 /opt/zbox/run/apache/httpd -k start
65534 23290 23284 0 21:09 ? 00:00:00 /opt/zbox/run/apache/httpd -k start
65534 23292 23284 0 21:09 ? 00:00:00 /opt/zbox/run/apache/httpd -k start
65534 23294 23284 3 21:09 ? 00:00:00 /opt/zbox/run/apache/httpd -k start
root 23377 19229 0 21:09 pts/0 00:00:00 grep --color=auto httpd
[root@VM_0_2_centos opt]# pkill -9 httpd
[root@VM_0_2_centos opt]# ps -ef | grep httpd
root 23680 19229 0 21:09 pts/0 00:00:00 grep --color=auto httpd
kill
kill 是用于杀掉单个进程,根据进程的PID, ps -ef
查出来的第二列就是PID
[root@VM_0_2_centos opt]# ps -ef | grep httpd
root 24431 24361 0 21:11 ? 00:00:00 /opt/zbox/run/apache/httpd -k start
65534 24432 24431 0 21:11 ? 00:00:00 /opt/zbox/run/apache/httpd -k start
65534 24433 24431 0 21:11 ? 00:00:00 /opt/zbox/run/apache/httpd -k start
65534 24445 24431 0 21:11 ? 00:00:00 /opt/zbox/run/apache/httpd -k start
root 24519 19229 0 21:11 pts/0 00:00:00 grep --color=auto httpd
[root@VM_0_2_centos opt]# kill -9 24431
这里 kill 是杀掉单个进程PID,如果想杀掉全部的,需配合 awk 命令
ps -ef | grep httpd | awk ‘{print $2}’ | xargs kill -9
[root@VM_0_2_centos opt]# ps -ef | grep httpd
root 26267 26194 0 21:15 ? 00:00:00 /opt/zbox/run/apache/httpd -k start
65534 26269 26267 0 21:15 ? 00:00:00 /opt/zbox/run/apache/httpd -k start
65534 26270 26267 0 21:15 ? 00:00:00 /opt/zbox/run/apache/httpd -k start
65534 26273 26267 0 21:15 ? 00:00:00 /opt/zbox/run/apache/httpd -k start
root 26358 19229 0 21:15 pts/0 00:00:00 grep --color=auto httpd
[root@VM_0_2_centos opt]# ps -ef | grep httpd | awk '{print $2}' | xargs kill -9
kill: sending signal to 26652 failed: No such process
[root@VM_0_2_centos opt]# ps -ef | grep httpd
root 26664 19229 0 21:15 pts/0 00:00:00 grep --color=auto httpd
[root@VM_0_2_centos opt]#
参数说明
- ps -ef 是linux 里查看所有进程的命令。
- grep httpd 所有含有关键字"httpd"的进程
- awk ‘{print $2}’ 输出第二列的PID
- xargs 是将获取到的多个PID标准输入转为命令行参数。
- kill -9 杀掉xargs获取到的对应的PID
如果能准确知道进程名称,可以直接用killall 和pkill ,如果是模糊匹配进程名称,就用最后一个
ps -ef | grep 进程名称 | awk ‘{print $2}’ | xargs kill -9
标签:opt,httpd,00,grep,pkill,28,Linux,root,21 来源: https://blog.csdn.net/qq_27371025/article/details/117788992