This repository serves as a container for all of the motd files I use.
When you login to a system (e.g. via ssh), your system will prompt you with the message of the day (motd). Normally the text to be shown there is stored under /etc/motd but there was demand for dynamic motds. That's when the package update-motd became popular. The history of that is kinda weird and crazy, that's why you find a lot of confusing articles out there on how to set it up (which might be way outdated by now).
Setting up a dynamic motd is quite easy on a modern debian or ubuntu os. My reference is this great article written by @nachoparker.
If you have an up to date debian or ubuntu you can start right away.
cd /etc/update-motd.d/
After opening that directory you can download/create your own motd script files there. One important thing: the scripts inside that folder will be executed in the order of their names (alphabetically) ascending. That means a script called "bar" will be executed before a script called "foo". That's why most of the scripts in that folder will have special names beginning with a double digit number such as "10-foo" and "20-bar" (that way you can have foo before bar).
Make sure you are root when you want to store files into that directory! Downloading the files is easy. Just open a GitHub repo, choose a script you want to download, click on "Raw" on the upper right side of the file and copy its link.
Since we are inside the correct directory, we don't need to specify the -O parameter.
wget https://raw.githubusercontent.com/d-Rickyy-b/motd-files/master/10-header
One of the most important steps is to make the files executable!
chmod a+x 10-header
Now we are nearly finished. Go ahead and delete your current /etc/motd file with
rm /etc/motd
If you now login to your system via ssh it should work just fine. If it does not, you might need to check your /etc/ssh/sshd_config server config. You must use PAM for this to work UsePAM yes. Also make sure to set PrintMotd no.
Lastly you need to check if your /etc/pam.d/sshd (for ssh logins) and /etc/pam.d/login (local terminal logins) config file contains the following content:
# Print the message of the day upon successful login.
# This includes a dynamically generated part from /run/motd.dynamic
# and a static (admin-editable) part from /etc/motd.
session optional pam_motd.so motd=/run/motd.dynamic
# session optional pam_motd.so noupdate
The motd=/run/motd.dynamic must be present. If it is not, add it.
If both pam_motd.so motd=/run/motd.dynamic and pam_motd.so noupdate are present, PAM will first display the dynamically generated MOTD from /run/motd.dynamic, followed by the static MOTD in /etc/motd.
However, it's uncommon to use both unless you explicitly want both a dynamic and static MOTD.
Here is a screenshot of the motd one of my servers
Most of these scripts parse some information from certain commands to display them. If your os is not set to english, the scripts might fail to parse the correct data.
Also remember that all those scripts will be executed before your server starts your session & shell. That means the more work you do there, the longer it takes for your shell to appear.
You can always use time /path/to/script to check the execution time of your script. Make sure all scripts together don't take longer than a second or you will have to wait for quite a long time.
If you have any questions, don't hesitate to contact me.