在运维过程中，常常会telnet某个ip端口，如果 能telnet通，怎么退出呢 ？

1、telnet 63.172.25.18 6463 回车

Trying 63.172.25.18...

Connected to 63.172.25.18 (63.172.25.18).

Escape character is '^]'.

2、ctrl + ] 回车

telnet>

3、? 回车

close close current connection

logout forcibly logout remote user and close the connection

display display operating parameters

mode try to enter line or character mode ('mode ?' for more)

open connect to a site

quit exit telnet

send transmit special characters ('send ?' for more)

set set operating parameters ('set ?' for more)

unset unset operating parameters ('unset ?' for more)

status print status information

toggle toggle operating parameters ('toggle ?' for more)

slc change state of special charaters ('slc ?' for more)

auth turn on (off) authentication ('auth ?' for more)

encrypt turn on (off) encryption ('encrypt ?' for more)

forward turn on (off) credential forwarding ('forward ?' for more)

z suspend telnet

! invoke a subshell

environ change environment variables ('environ ?' for more)

? print help information

4、quit 回车

Connection closed.