检查端口是否打开
代码示例
如何检查服务器上的侦听端口
$ sudo netstat -plnt
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN 3686/mysqld
tcp 0 0 :::443 :::* LISTEN 2218/httpd
tcp 0 0 :::80 :::* LISTEN 2218/httpd
tcp 0 0 :::22 :::* LISTEN 1051/sshd
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