netstat

• netstat -tulnp 查看端口情况

• netstat -atn |grep 192.168.205.11 查看是否有到 192.168.205.11 的连接

• -t: display only tcp connections

• -n: show numerical addresses

• -u: display only udp connections

• -l: show only listening sockets

• -p: show name of process IDs, name of programs

• -r: kernel routing table

• -a: display all sockets (default: connected)