例如：
brianbi@local:~$ ssh root@remote
root@remote's password:
.Linux remote 2.6.32-042stab113.21 #1 SMP Wed Mar 23 11:05:25 MSK 2016 i686
The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.
Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
You have mail.
Last login: Sat May 13 22:43:25 2017 from (redacted)
点位于最开始，在打印 uname 和 motd 之前。
无论我登录哪个用户帐户，也无论我从哪里 ssh，都会打印出这个点。另外，~/.hushlogin 不会阻止打印这个点。
如果我做
ssh root@remote /bin/true
那么只打印点（然后会话关闭）。
什么可以解释这一点？