linux下查看所有监听端口

1.检查所有监听端口

#netstat -tln | awk 'NR>2{sub(".*:","",$4);print $4}'

 2.检查所有监听端口并排序去重

#netstat -tln | awk 'NR>2{sub(".*:","",$4);print $4}' | sort | uniq