linux网络监控命令集锦

linux网络监控命令集锦   iproute 包下的ss命令很有用，例如：

Task: Display All Open Network Ports

# ss -l  

监控SMTP连接

# ss -o state established '( dport = :smtp or sport = :smtp )'

监控HTTP连接

# ss -o state established '( dport = :http or sport = :http )'   watch -n 1 " ss -o state established '( dport = :http or sport = :http )'"