查找进程PID的两种方式　通过程序名称　通过程序监听的端口号

r囧r小猫 2023-06-26 12:11 8阅读 0赞

## shell ##

假设我想查询tomcat后台进程的PID号，然后杀死这个进程。  
我知道的东西：

*  运行的程序名称：`tomcat`  
    `ps -aux | grep tomcat`
 *  该进程监听的端口号：`8080`  
    `netstat -anp | grep 8080`  
    `ls -i:8080`

## 执行过程 ##

wuyujin@ubuntu18:~$ # 1. 用名称查询进程
    wuyujin@ubuntu18:~$ ps -aux | grep tomcat
    wuyujin  13368  0.8  1.0 6636208 125152 pts/0  Sl   21:30   0:06 /opt/jdk1.8.0_221/jre/bin/java -Djava.util.logging.config.file=/opt/apache-tomcat-9.0.30/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djdk.tls.ephemeralDHKeySize=2048 -Djava.protocol.handler.pkgs=org.apache.catalina.webresources -Dorg.apache.catalina.security.SecurityListener.UMASK=0027 -Dignore.endorsed.dirs= -classpath /opt/apache-tomcat-9.0.30/bin/bootstrap.jar:/opt/apache-tomcat-9.0.30/bin/tomcat-juli.jar -Dcatalina.base=/opt/apache-tomcat-9.0.30 -Dcatalina.home=/opt/apache-tomcat-9.0.30 -Djava.io.tmpdir=/opt/apache-tomcat-9.0.30/temp org.apache.catalina.startup.Bootstrap start
    wuyujin  15080  0.0  0.0  21532  1044 pts/0    S+   21:43   0:00 grep --color=auto tomcat
    wuyujin@ubuntu18:~$ 
    wuyujin@ubuntu18:~$ # 2. 用程序监听的端口号查询进程
    wuyujin@ubuntu18:~$ netstat -anp | grep 8080
    (Not all processes could be identified, non-owned process info
     will not be shown, you would have to be root to see it all.)
    tcp6       0      0 :::8080                 :::*                    LISTEN      13368/java          
    wuyujin@ubuntu18:~$ lsof -i:8080
    COMMAND   PID    USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
    java    13368 wuyujin   55u  IPv6  84275      0t0  TCP *:http-alt (LISTEN)
    wuyujin@ubuntu18:~$ 
    wuyujin@ubuntu18:~$ # 根据PID杀死对应进程
    wuyujin@ubuntu18:~$ kill -9 13368
    wuyujin@ubuntu18:~$

三种方式，都查出了本次tomcat后台运行进程的PID为`13368`，使用`kill`命令可杀死该进程。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1eXVqaW4xOTk3_size_16_color_FFFFFF_t_70_pic_center]

## 相关命令及用途 ##

wyj@g40:~$ whatis ps
    ps (1)               - report a snapshot of the current processes.
    wyj@g40:~$ whatis lsof
    lsof (8)             - list open files
    wyj@g40:~$ whatis netstat
    netstat (8)          - Print network connections, routing tables, interface statistics, masquerade connections, and multicast memberships
    wyj@g40:~$ whatis grep
    grep (1)             - print lines matching a pattern
    wyj@g40:~$ whatis kill
    kill (1)             - send a signal to a process
    kill (2)             - send signal to a process

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1eXVqaW4xOTk3_size_16_color_FFFFFF_t_70_pic_center]: https://img-blog.csdnimg.cn/20200401214535203.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d1eXVqaW4xOTk3,size_16,color_FFFFFF,t_70#pic_center