Mac 中 查看网络连接数


-n 表示不显示主机名 -P 表示不显示端口俗称 不加 sudo 只能查看以当前用户运行的程序

当前用户名下启动的链接数

$ lsof -itcp -n
COMMAND     PID     USER   FD   TYPE             DEVICE SIZE/OFF NODE NAME
CalendarA   400 <user>   47u  IPv4 0x25bdd13901adaa17      0t0  TCP 127.0.0.1:53564->127.0.0.1:12639 (ESTABLISHED)
redis-ser   505 <user>    6u  IPv4 0x25bdd138dd307397      0t0  TCP 127.0.0.1:6379 (LISTEN)
redis-ser   505 <user>    7u  IPv6 0x25bdd138da0b4a57      0t0  TCP [::1]:6379 (LISTEN)
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当前用户名下监听的端口

$ lsof -itcp -stcp:listen
COMMAND     PID     USER   FD   TYPE             DEVICE SIZE/OFF NODE NAME
redis-ser   505 <user>    6u  IPv4 0x25bdd138dd307397      0t0  TCP localhost:6379 (LISTEN)
redis-ser   505 <user>    7u  IPv6 0x25bdd138da0b4a57      0t0  TCP localhost:6379 (LISTEN)
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附录:使用 netstat 命令查看连接数

$ netstat -antvp tcp
Active Internet connections (including servers)
Proto Recv-Q Send-Q  Local Address          Foreign Address        (state)     rhiwat shiwat    pid   epid  state    options
tcp4       0      0  127.0.0.1.42103        127.0.0.1.64608        ESTABLISHED 431859 146988    159      0 0x0182 0x00000004
tcp4       0      0  127.0.0.1.64608        127.0.0.1.42103        ESTABLISHED 374836 146988   1038      0 0x0182 0x00020000
tcp4       0      0  *.88                   *.*                    LISTEN      131072 131072    174      0 0x0180 0x00000006
tcp6       0      0  *.88                   *.*                    LISTEN      131072 131072    174      0 0x0180 0x00000006
tcp4       0      0  *.548                  *.*                    LISTEN      131072 131072      1      0 0x0180 0x00000006
tcp6       0      0  *.548                  *.*                    LISTEN      131072 131072      1      0 0x0180 0x00000006
tcp4       0      0  *.445                  *.*                    LISTEN      131072 131072      1      0 0x0180 0x00000006
tcp6       0      0  *.445                  *.*                    LISTEN      131072 131072      1      0 0x0180 0x00000006
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reference

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