配置 ssh localhost
LONMID@LONMID-PC ~
$ ssh localhost
The authenticity of host 'localhost (::1)' can't be established.
ECDSA key fingerprint is 1a:24:f9:66:c1:7a:16:d0:04:7b:b8:ba:f8:57:52:a6.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'localhost' (ECDSA) to the list of known hosts.
LONMID@LONMID-PC ~
$ who
LONMID?? tty0???????? 2011-09-06 15:31 (::1)
LONMID@LONMID-PC ~
$