Show my custom ssh/terminal login message (motd):
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This starts/shows neofetch when login into Ubuntu on ssh:

On the Ubuntu server, go to directory /etc/update-motd.d
This folder is for exactable scripts to ad to motd (the terminal login message program on Linux/Unix).

Can also view dictanary with:
ls /etc/update-motd.d

---------------------------------
Make parts you no longer want in motd un-exactable with:
sudo chmod -x /etc/update-motd.d/*
This will remove all paragrapths from motd, Will re enable what I want later in instructions.
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To add neotech, create the 01-neo file in the /etc/update-motd.d with nano
(no .txt exstention and need sudo, can be any name with a ##- at the start but this is my preferred name)

create file:
sudo nano /etc/update-motd.d/01-neo

and add this code:

#!/bin/bash
neofetch
echo

save 01-neo with ^X then Y
---------------------------------------
To add cpufetch, create the 02-cpufetch file in the /etc/update-motd.d with nano
(no .txt exstention and need sudo, can be any name with a ##- at the start but this is my preferred name)

create file:
sudo nano /etc/update-motd.d/02-cpufetch

and add this code:

#!/bin/bash
cpufetch
echo

save 01-neo with ^X then Y
------------------------------------------------------------
To then add ntp clock status create the 03-clock file with sudo nano and add this code:
sudo nano /etc/update-motd.d/03-clock
  
#!/bin/bash
timedatectl status
echo
systemctl status systemd-timesyncd | grep Status
echo
systemctl status systemd-timesyncd | grep Active
echo

Then save it, this will show basic clock status,
plus show what ntp server I am connecting to,
and show how long the ntp server has been running for (usually the same amount of time as the server it's self, with few exceptions).
------------------------------------------
Then to show cpu temperature, create the 03-temp file and add this code:
(You will have needed to create the temp script shown elsewhere on this website).
sudo nano /etc/update-motd.d/03-temp


#!/bin/bash
echo "============================"
echo "CPU Temputure is: "
temp echo
echo "============================"

Then save it, and this will display the cpu temputure. 
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Also, create a note to show what ver of java is installed (if any, only enable if I did install java).
sudo nano /etc/update-motd.d/93-java-ver

Contents fo file:

#!/bin/bash
java --version
echo

Then save it with ^X
-------------------------------------------------------------------------

Also, create a note script to show cmmon used comands relating to my server:
sudo nano /etc/update-motd.d/96-notes

Contents fo file:

#!/bin/bash
echo "========================================================================================================================"
echo "reset permissions (in case of file locking) of all NFS drives with command: sudo chmod -R 777 /opt/RD/*"
echo "Show detailed system monitor (CLI) with command: btop"
echo "Show detailed system power consumption (CLI) with command: sudo powertop"
echo "See boot loader info with: 'vcgencmd bootloader_version' *Raspberry PI 4B only! "
echo "Location of web files: /var/www/html"
echo "Use: 'wget url & disown' to download files when want logged off"
echo "Modern Youtube-dl is now called yt-dlp . It is much faster and more stable."
echo "ytd is my allis to 'yt-dlp -f bestvideo+bestaudio/best --merge-output-format mkv'"
echo "Use: 'nohup ytd url >> log.txt &' to download youtube videos when want logged off"
echo "Copy Apache log files to SNAS to view by: cp -a -r /var/log/apache2/. /opt/RD/SNAS/Logs/apache2"
echo "yt-thumb is my allis to download a YouTube thumbnail (image only)."
echo "Run sudo rm /var/www/html/mycloud/nextcloud.log to allow Nextcloud run an update."
echo "========================================================================================================================"
echo

Then save it with ^X
-----------------------------------------------------------
To show specific CPU information, only really used on Wii U.

sudo nano /etc/update-motd.d/04-cpu

#!/bin/bash
lscpu
echo


Then save it with ^X
-------------------------------------------------------------
*This is for NEC PC's only:
sudo nano /etc/update-motd.d/94-nec

#!/bin/bash
echo "This is spec listings for this server: "
echo
dmidecode | grep -e Product -e Vendor -e Family -e Release
echo


Then save it with ^X
--------------------------------------------------------------
*This is used on pi only, this will provide Bootloader date and other info

sudo nano /etc/update-motd.d/88-pi_boot

#!/bin/bash
echo "============================"
echo "Your Raspberry Pi Bootloader(Firmware) infomation: "
vcgencmd bootloader_version echo
echo "============================"


Then save it with ^X
--------------------------------------------------------------


Then I will add back the parts I usually use as well as what I just created through:
cd /etc/update-motd.d/
sudo chmod +x 90* 91* 92* 98-reboot-required 96-notes 03-temp 02-cpufetch 03-clock 01-neo 93-java-ver 04-cpu 88-pi_boot

Then log off then log back on and you should have custom motd screen.

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Source: https://linuxconfig.org/how-to-change-welcome-message-motd-on-ubuntu-18-04-server
Date: March 26th, 2021 - March 31st, 2021