ssh登录后的提示信息怎么修改？

[ssfyn]

使用ssh登录后会提示一些信息，不知道这个信息怎么改呀？
我现在登录后会提示
The programs included with the Ubuntu system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.

To access official Ubuntu documentation, please visit:
http://help.ubuntu.com/

System information as of Fri Feb 6 10:30:01 CST 2009

System load: 0.08 Memory usage: 9% Processes: 80
Usage of /: 10.5% of 8.89GB Swap usage: 0% Users logged in: 1

Graph this data and manage this system at https://landscape.canonical.com/
Last login: Fri Feb 6 10:31:05 2009 from

[bones7456]

cat /etc/motd

[eexpress]

估计登录lily的机器，提示就是“欢迎来lily排骨的家折腾”

[ssfyn]

cat /etc/motd

3Q，这个找到了，这是欢迎词，但是这个文件好像是某段程序生成出来的
输出/etc/motd.tail中的内容
但是底下还执行了几条命令，比如显示系统CPU占用率，内存，交换分区等的landscape-sysinfo命令
这些在哪儿的呢？