issue.net & motd
新開了阿里雲的機器之後機器 ssh 過去的預設提示是：
Welcome to Ubuntu 14.04.4 LTS (GNU/Linux 3.13.0-86-generic x86_64)
* Documentation: https://help.ubuntu.com/
Welcome to aliyun Elastic Compute Service!可以加一些內容。一共兩個與之相關：
-
issue.net : Display a banner message before the password login prompt.
-
motd : Display a banner message after the user has logged in.
設定 issue.net
在下面檔案中新增想要新增的內容
# vim /etc/issue.net在 Text to ASCII Art Generator (TAAG) 上面生成了 ASCII Art。
Ubuntu 14.04.4 LTS
______ _____ _____
| ____/ ____|/ ____|
| |__ | | | (___
| __|| | \___
| |___| |____ ____) |
|______\_____|_____/
改 config
# vim /etc/ssh/sshd_config搜尋 Banner 並取消掉它的註釋
#Banner /some/path需要 reload ssh
# service ssh reloadmotd
Message of the Day 的意思，內容放在 /etc/motd，另外還可以用 UpdateMotd 動態生成的內容，參考 UpdateMotd 。
這裡先不深究，而是直接 apt-get install landscape-common。landscape-common 會顯示一些機器的資訊。
Welcome to Ubuntu 16.04 LTS (GNU/Linux 4.4.0-28-generic x86_64)
* Documentation: https://help.ubuntu.com
* Management: https://landscape.canonical.com
* Support: https://ubuntu.com/advantage
System information as of Tue Jul 12 10:21:51 MDT 2016
System load: 0.09 Users logged in: 1
Usage of /: 12.3% of 225.17GB IP address for enp7s0: 192.168.X.XXX
Memory usage: 45% IP address for wlp9s1: 192.168.X.XXX
Swap usage: 0% IP address for docker0: 172.17.0.1
Processes: 397
Graph this data and manage this system at:
https://landscape.canonical.com/
0 packages can be updated.
0 updates are security updates.
Last login: Tue Jul 12 10:03:16 2016 from 192.168.X.XXX