Raspberry Pi 2 Model B 1GB RAM

Thanks to Jim (who lives in a beautiful neighborhood of San Jose, CA I never even knew existed) for letting me have a Raspberry Pi 2 Model B (1 GB) + 8 GB micro SD card + power supply + (wifi card, which I'm currently not using). I got in touch with Jim when I saw his post on Craigslist.

I will add the 'why' and 'what' part later, let me just get started with the 'how' part of my usage of this Raspberry Pi.

(For 64-bit Pi, see RPi4-ModelB-4GB-RAM)

After getting Raspberry Pi OS (Legacy, 32-bit) Lite image (with ssh enabled and a user/password created) on to micro SD card through Raspberry Pi Imager:

1. inserted the micro SD card into Raspberry Pi, connected it to my ISP-provided router with an ethernet cable, and powered it on. After waiting for a minute or so, the Pi showed up on the admin console of the router. It was given the IP address, 192.168.1.64

2. logged into Pi from a terminal on my Mac:

   ssh rpi21gb@192.168.1.64

3. updated packages. (the following update / upgrade / autoremove can be run later also when the system needs to be updated with the latest Docker packages and/or other packages)

   sudo apt update && sudo apt upgrade -y && sudo apt autoremove
   

4. set the IP address (from step 1) above) as static IP address on Pi:

   sudo systemctl enable NetworkManager
   sudo systemctl start NetworkManager
   nmcli device show eth0
   sudo nmtui edit “Wired connection 1” # Pi / Gateway / Router IP Address are set here
   sudo shutdown -h reboot # if that doesn't work, try: sudo shutdown -r now
   

   

5. Mounted a USB drive (which till now I had on my OpenWRT router and accessible on home network through Samba) with FLAC files of my (approximately 250) audio CD collection:

   # if needed, to add, delete, or modify disk partitions
   # sudo fdisk /dev/sda and
   # sudo mkfs.ext4 /dev/sda1
   sudo mkdir /mnt/usb128gb
   sudo mount /dev/sda1 /mnt/usb128gb
   lsblk -d -fs /dev/sda1 #use info from this command in the next step
   

6. Using information from 'lsblk' above, added the following to /etc/fstab so that the USB drive is automatically mounted whenever a reboot occurs:

   UUID=58442e0d-2fd0-41a3-8cb1-9a321c4638e4 /mnt/usb128gb ext4 noauto,nofail,x-systemd.automount,x-systemd.idle-timeout=60,x-systemd.device-timeout=2
   

7. Installed and configured Samba so that the files on USB drive are accessible on home network:

   sudo apt install samba -y
   # [music]
   #    comment = All My Music
   #    path = /mnt/usb128gb/music
   #    browseable = yes
   #    read only = yes
   #    guest ok = yes
   #
   # [nobody]
   #    comment = so as to not display
   #    browseable = no
   # added above 10 lines to the end of /etc/samba/smb.conf
   vi /etc/samba/smb.conf
   sudo service smbd restart
   sudo apt install ufw -y
   sudo ufw allow samba
   

8. Installed Docker and Portainer (I'll be using Portainer web UI to manage Docker containers):

   curl -sSL https://get.docker.com | sh
   docker version
   sudo systemctl enable docker
   sudo usermod -aG docker rpi21gb
   sudo docker pull portainer/portainer-ce:linux-arm
   sudo docker run -d -p 9000:9000 --name=portainer --restart=always -v /var/run/docker.sock:/var/run/docker.sock -v portainer_data:/data portainer/portainer-ce:linux-arm
   

9. With docker-compose.yaml loaded as stack in Portainer and environment variables from rpi2gb.env, I now have this running on my Pi:

   

10. CPU / Memory utilization appears to be well under control for even a Pi of this vintage (released in February 2015):

11. temperature and voltage measurements look good, too.

    rpi21gb@rpi21gb:~ $ vcgencmd measure_temp
    temp=43.3'C
    rpi21gb@rpi21gb:~ $ vcgencmd measure_volts
    volt=1.2000V
    

12. Portainer can be upgraded later when there is a newer version:

    sudo docker stop portainer && sudo docker rm portainer && sudo docker pull portainer/portainer-ce:linux-arm && sudo docker run -d -p 9000:9000 --name=portainer --restart=always -v /var/run/docker.sock:/var/run/docker.sock -v portainer_data:/data portainer/portainer-ce:linux-arm
    

13. One can't trust all open source software. Never hurts to have some antivirus software (from a reputable company like Cisco, no less!) run periodiclaly looking for trojans, viruses, malware & other malicious threats.

    sudo apt-get install clamav
    #exclude multiple directories repeating --exclude flag as many times as there are directories to be excluded
    sudo clamscan --log=/tmp/clamscan.log --exclude=/mnt/usb128gb --suppress-ok-results --infected --recursive  / > /dev/null 2>&1 &
    

    Takes some time for scan to complete. Check the log file, /tmp/clamscan.log, later.

14. Add the following to root's crontab to run the above periodically.

    # update virus definition files and then scan for viruses
    # at midnight, on first day of every month
    0 0 1 * *   rm -f /tmp/clamscan.log; /usr/bin/freshclam > /dev/null 2>&1; /usr/bin/clamscan --log=/tmp/clamscan.log --exclude=/mnt/usb128gb --suppress-ok-results --infected --recursive / > /dev/null 2>&1