如何才能让用户telnet进去之后不显示系统信息？

[gary.jsz]

我使用telnet登陆服务器，但是，无论登陆进去否，都会打印系统信息出来，这样我觉得有很多安全隐患，不知道是否可以屏蔽掉这些信息
信息如下：

Password:
Last login: Thu May 18 14:50:17 2006 from 222.70.223.114 on pts/2
Linux jsz 2.6.8-2-686 #1 Tue Aug 16 13:22:48 UTC 2005 i686 GNU/Linu

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.

一键入密码之后就显示如上信息了。

[phantom]

如果您擔心安全，為啥還用 Telnet?
請改用 ssh.

[gary.jsz]

ssh也会显示系统信息的
提示信息如下：
login as: jsz
Password:
Linux jsz 2.6.8-2-686 #1 Tue Aug 16 13:22:48 UTC 2005 i686 GNU/Linux

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.

Last login: Fri May 19 16:16:12 2006 from 222.70.223.114
jsz@jsz:~$

[訪客]

/etc/ssh/sshd_config

PrintMotd no