Changing the welcome message in Linux[MOTD] [ISSUE] [ISSUE.NET]
When a user logs in to a linux box via they typically will see a welcome message. Also called the "message of the day." If you have an ubuntu machine then you will see something similar to the following:
Linux my_desktop 2.6.27-11-server #1 SMP Thu Jan 29 20:19:41 UTC 2009 i686 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/
On most systems edit the /etc/motd with your desired contents:
sudo vi /etc/motd
However, on many Ubuntu systems the /etc/motd file is a symbolic link to /var/run/motd which may be rebuilt by /etc/init.d/bootmisc.sh from the /etc/motd.tail template at reboot or whenever /usr/sbin/update-motd runs (via /etc/cron.d/update-motd).
In these situations, edit the /etc/motd.tail file instead or change the /etc/motd symlink to another file, such as /etc/motd.static and make your changes there:
sudo vi /etc/motd.tail
The file /etc/issue is a text file which contains a message or system identification to be printed before the login prompt from the console. It may contain various @char and \char escape sequences that are supported by agetty.
|\b||Insert the baudrate of the current line.|
|\d||Insert the current date.|
|\s||Insert the system name, the name of the operating system.|
|\l||Insert the name of the current tty line.|
|\m||Insert the architecture identifier of the machine, eg. i486|
|\n||Insert the nodename of the machine, also known as the hostname.|
|\o||Insert the domainname of the machine.|
|\r||Insert the release number of the OS, eg. 1.1.9.|
|\t||Insert the current time.|
|\u||Insert the number of current users logged in.|
|\U||Insert the string "1 user" or " users" where is the number of current users logged in.|
|\v||Insert the version of the OS, eg. the build-date etc.|
/etc/issue.net may be displayed before the login prompt on remote connections (ssh, telnet, etc). /etc/issue.net doesn't support the escape sequences available for /etc/issue.
To have /etc/issue.net displayed on ssh conections add or uncomment the line, "Banner /etc/issue.net" in /etc/ssh/sshd_config to have /etc/issue.net displayed. Restart sshd and you are good to go:
sudo vi /etc/issue.net sudo vi /etc/ssh/sshd_config sudo /etc/init.d/ssh restart
Note: PuTTY does not typically display /etc/issue.net until after you enter your logon name.
Here's an example of /etc/issue that I like to use:
_//_\\ ," //". / \ _/ | (.-,--. | Hmmmm, /o/ o \ / Interlicious \_\ / /\/\ \ (__`--' ._) / `-. | ( ,`-. | `-,--\_ ) |-. _`.__.' ,-' \ |\ ) _.-' | i-\.'\ ,--+. .' .' \,-'/ \ / / / \
To use this for /etc/issue you must escape all the backslash characters (replace all the "\" with "\\") as /etc/issue supports escape sequences.