如题。vps系统是Ubuntu16.4 888端口是干什么的?怎么关闭?还有启用了HTTPS80端口是不是也可以关闭?小白求教。谢谢
root@vultr:~# netstat -a
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 *:https *:* LISTEN
tcp 0 0 *:mysql *:* LISTEN
tcp 0 0 localhost:submission *:* LISTEN
tcp 0 0 *:http *:* LISTEN
tcp 0 0 *:5428 *:* LISTEN
tcp 0 0 *:ftp *:* LISTEN
tcp 0 0 *:ssh *:* LISTEN
tcp 0 0 *:888 *:* LISTEN
tcp 0 0 localhost:smtp *:* LISTEN
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