bradsec / debmotd

Debian Ubuntu Raspberry Pi Linux Message of the Day (MOTD) banner with system information

Debian Ubuntu Raspberry Pi Linux Message of the Day (MOTD) banner with system information

Tested with the following systems

• Debian 11
• Ubuntu 22.04 LTS
• FreeBSD 13 (currently limited display options)

Sample output

╔═════════════════════════════════════════════╗
║     YOU HAVE ACCESSED A PRIVATE SYSTEM      ║
║         AUTHORISED USER ACCESS ONLY         ║
║                                             ║
║ Unauthorised use of this system is strictly ║
║ prohibited and may be subject to criminal   ║
║ prosecution.                                ║
║                                             ║
║  ALL ACTIVITIES ON THIS SYSTEM ARE LOGGED.  ║
╚═════════════════════════════════════════════╝

System Hostname...: debian01
System Date/Time..: Mon, 14 August 2023, 12:05:45 PM
System Uptime.....: 3 hours, 34 minutes
System OS.........: Debian GNU/Linux 12 (bookworm)
System Kernel.....: 6.1.0-11-amd64
System Arch.......: x86_64
System Proc.......: 13th Gen Intel(R) Core(TM) i7-13700K
Memory Usage......: 2199MB/64068MB (3%)
Storage /.........: 380GB/982GB (36%)
Storage /boot.....: 183MB/478MB (35%)
Storage /boot/efi.: 37MB/536MB (7%)
Network eth0......: 192.168.1.10
Ext. IP Address...: 12.34.56.78
Ext. IP Location..: City Region CountryCode
Ext. IP ORG/ISP...: Provide / ISP Information


Raspberry Pi will display processor as follows - 
System Proc.......: Raspberry Pi 4 Model B Rev 1.1

Usage Quick Install

The following applies to Debian and Raspberry Pi

# Download `motd.sh` as `00-motd` into `/etc/update-motd.d/` directory and set permissions.
sudo wget -qO /etc/update-motd.d/00-motd https://raw.githubusercontent.com/bradsec/debmotd/main/motd.sh &&\
sudo chmod 755 /etc/update-motd.d/00-motd

# Rename default motd (applies to Debian and Raspberry Pi not Ubuntu) 
sudo mv /etc/motd /etc/motd.original

# Disable any other scripts in `/etc/update-motd.d/` apart from the new `00-motd`  
sudo chmod -x /etc/update-motd.d/* &&\
sudo chmod +x /etc/update-motd.d/00-motd &&\

# Update the SSH config to prevent last user login information being displayed.
sudo sed -i 's/#PrintLastLog yes/PrintLastLog no/' /etc/ssh/sshd_config &&\
sudo sed -i 's/PrintLastLog yes/PrintLastLog no/' /etc/ssh/sshd_config &&\
sudo systemctl restart ssh

Notes / Troubleshooting

• The ipinfo.io lookup delays the execution and login slightly.
• Comment out in the sys_info() function to disable this function.
• Ubuntu by default may be missing ifconfig and no display network interface IP information.
• Simply install net-tools using sudo apt install net-tools