Nifty hardware, here's some stuff to do with it.

RPi builds

This is using them for stuff like Pihole and Wireguard.

• https://www.reddit.com/r/pihole/comments/c62np8/pihole_with_unbound_wireguard_vpn_server_on_a/

• https://github.com/harrypnyce/raspbian10-buster/blob/master/README.md

• https://www.raspberrypi-spy.co.uk/2019/10/pi-hole-oled-status-screen/

• https://www.reddit.com/r/pihole/comments/bnihyz/guide_how_to_install_wireguard_on_a_raspberry_pi/

Monitoring is good too.

• https://bestmonitoringtools.com/how-to-install-zabbix-on-raspberry-pi-raspbian/

Apt Cacher NG

Package cache, great for RPi because one of the upstream repos is horrible and slow.

• https://wiki.debian.org/AptCacherNg

• https://www.unix-ag.uni-kl.de/~bloch/acng/

• https://help.ubuntu.com/community/Apt-Cacher-Server

• https://fabianlee.org/2018/02/11/ubuntu-a-centralized-apt-package-cache-using-apt-cacher-ng/

PXE utility server

https://wiki.polaire.nl/doku.php?id=raspberry_pi_pxe_server

Minimising

Stuff you can do to make it boot faster and run leaner. These notes are from running Fedora, but they're somewhat general.

disable wifi in config.txt (https://raspberrypi.stackexchange.com/questions/43720/disable-wifi-wlan0-on-pi-3)
    dtoverlay=disable-wifi
    yum erase -y wpa_supplicant
disable selinux (https://docs.fedoraproject.org/en-US/Fedora/13/html/Security-Enhanced_Linux/sect-Security-Enhanced_Linux-Enabling_and_Disabling_SELinux-Disabling_SELinux.html)
    selinux=0 on kernel comdline
    grub2-mkconfig -o /boot/efi/EFI/fedora/grub.cfg
disable firewalld
    systemctl disable firewalld --now
    dnf erase -y firewalld
disable auditd
    audit=0 on kernel comdline
    grub2-mkconfig -o /boot/efi/EFI/fedora/grub.cfg
disable sound (https://www.instructables.com/id/Disable-the-Built-in-Sound-Card-of-Raspberry-Pi/)
    modprobe.d blacklisting /etc/modprobe.d/raspi-blacklist.conf
    
disable fstrim (do it with an @reboot crontab)
    systemctl disable fstrim.service --now
    /usr/sbin/fstrim --fstab --verbose --quiet
remove lvm2
    yum erase -y lvm2