After login via SSH to the server you can see welcome message like:

or any else.

If you wish to change this message, create file:

/etc/motd.tail

(vi /etc/motd)

a key (to start writing)

write the content you wish to see after SSH login, leave first line blank.

Ctrl + C to stop writing

:wq to write changes
:q! to discard changes

then you can reboot server if u wish