根据端口查进程号

  1. ss -tnlp|grep 80
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    LISTEN 0      511          0.0.0.0:80         0.0.0.0:*    users:(("nginx",pid=977,fd=6),("nginx",pid=976,fd=6),("nginx",pid=975,fd=6),("nginx",pid=974,fd=6),("nginx",pid=973,fd=6),("nginx",pid=972,fd=6),("nginx",pid=971,fd=6),("nginx",pid=970,fd=6))
    LISTEN 0      4096       127.0.0.1:8088       0.0.0.0:*                                                                                                                                                                                                   
    LISTEN 0      511             [::]:80            [::]:*    users:(("nginx",pid=977,fd=7),("nginx",pid=976,fd=7),("nginx",pid=975,fd=7),("nginx",pid=974,fd=7),("nginx",pid=973,fd=7),("nginx",pid=972,fd=7),("nginx",pid=971,fd=7),("nginx",pid=970,fd=7))
    LISTEN 0      4096               *:8086             *:*
  2. netstat -tnlp|grep 80
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    tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      970/nginx: worker p 
    tcp        0      0 127.0.0.1:8088          0.0.0.0:*               LISTEN      -                   
    tcp6       0      0 :::80                   :::*                    LISTEN      970/nginx: worker p 
    tcp6       0      0 :::8086                 :::*                    LISTEN      -
  3. lsof -i -P|grep 80
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    nginx      970 tellw    6u  IPv4  31007      0t0  TCP *:80 (LISTEN)
    nginx      970 tellw    7u  IPv6  31008      0t0  TCP *:80 (LISTEN)
    nginx      971 tellw    6u  IPv4  31007      0t0  TCP *:80 (LISTEN)
    nginx      971 tellw    7u  IPv6  31008      0t0  TCP *:80 (LISTEN)
    nginx      972 tellw    6u  IPv4  31007      0t0  TCP *:80 (LISTEN)
    nginx      972 tellw    7u  IPv6  31008      0t0  TCP *:80 (LISTEN)
    nginx      973 tellw    6u  IPv4  31007      0t0  TCP *:80 (LISTEN)
    nginx      973 tellw    7u  IPv6  31008      0t0  TCP *:80 (LISTEN)
    nginx      974 tellw    6u  IPv4  31007      0t0  TCP *:80 (LISTEN)
    nginx      974 tellw    7u  IPv6  31008      0t0  TCP *:80 (LISTEN)
    nginx      975 tellw    6u  IPv4  31007      0t0  TCP *:80 (LISTEN)
    nginx      975 tellw    7u  IPv6  31008      0t0  TCP *:80 (LISTEN)
    nginx      976 tellw    6u  IPv4  31007      0t0  TCP *:80 (LISTEN)
    nginx      976 tellw    7u  IPv6  31008      0t0  TCP *:80 (LISTEN)
    nginx      977 tellw    6u  IPv4  31007      0t0  TCP *:80 (LISTEN)
    nginx      977 tellw    7u  IPv6  31008      0t0  TCP *:80 (LISTEN)
    kdeconnec 2637 tellw   20u  IPv6  35280      0t0  UDP *:1716 
    transmiss 8984 tellw   23u  IPv4  80630      0t0  UDP tellw-notebo:43972->_gateway:5351
  4. fuser -v 80/tcp
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                         用户     进程号 权限   命令
    80/tcp:              tellw       970 F.... nginx
                         tellw       971 F.... nginx
                         tellw       972 F.... nginx
                         tellw       973 F.... nginx
                         tellw       974 F.... nginx
                         tellw       975 F.... nginx
                         tellw       976 F.... nginx
                         tellw       977 F.... nginx

    根据进程号查进程名

  5. ps -p 970 -o comm=
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    nginx
  6. ps aux|grep 970
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    tellw        970  0.0  0.0  55848  5764 ?        S    21:06   0:00 nginx: worker process
    root        9702  0.0  0.0      0     0 ?        I    22:39   0:00 [kworker/u16:0-events_power_efficient]
    tellw      10695  0.0  0.0  13364  2432 pts/0    S+   23:00   0:00 grep --color=auto 970

    根据进程名查进程号

    pidof nginx
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    977 976 975 974 973 972 971 970 969

https://zhuanlan.zhihu.com/p/474922957 Linux运维必知：如何从其 PID 中查找进程名称

https://zhuanlan.zhihu.com/p/45920111 如何在 Linux 中查看进程占用的端口号

9.22.23.5