System optimization

Clean-up

Raspberry pi OS

nano /boot/firmware/config.txt
dtparam=audio=off

systemctl --user stop mpris-proxy.service
systemctl --user disable mpris-proxy.service
systemctl --user mask mpris-proxy.service

sudo systemctl stop bluetooth.service
sudo systemctl disable bluetooth.service

sudo systemctl stop ModemManager
sudo systemctl disable ModemManager
sudo apt-get -y purge modemmanager

sudo systemctl stop hciuart.service
sudo systemctl disable hciuart.service

sudo systemctl stop serial-getty@ttyAMA0.service
sudo systemctl disable serial-getty@ttyAMA0.service
sudo systemctl stop getty@ttyAMA0.service
sudo systemctl disable getty@ttyAMA0.service

sudo systemctl disable apt-daily.service
sudo systemctl disable apt-daily.timer
sudo systemctl disable apt-daily-upgrade.timer
sudo systemctl disable apt-daily-upgrade.service
sudo systemctl disable man-db.service

sudo systemctl disable triggerhappy.service
sudo systemctl disable keyboard-setup.service

sudo systemctl disable wpa_supplicant.service
sudo systemctl disable wifi-country.service
sudo systemctl disable avahi-daemon.service
sudo systemctl disable ntp.service
sudo systemctl disable dhcpcd.service
sudo systemctl disable networking.service
sudo systemctl disable ssh.service

Ubuntu

sudo systemctl stop bluetooth.service
sudo systemctl disable bluetooth.service

sudo systemctl stop ModemManager
sudo systemctl disable ModemManager
sudo apt-get -y purge modemmanager

sudo systemctl stop hciuart.service
sudo systemctl disable hciuart.service

sudo systemctl disable apt-daily.service
sudo systemctl disable apt-daily.timer
sudo systemctl disable apt-daily-upgrade.timer
sudo systemctl disable apt-daily-upgrade.service
sudo systemctl disable man-db.service

sudo systemctl disable triggerhappy.service
sudo systemctl disable keyboard-setup.service

sudo systemctl disable wpa_supplicant.service
sudo systemctl disable wifi-country.service
sudo systemctl disable avahi-daemon.service
sudo systemctl disable ntp.service
sudo systemctl disable dhcpcd.service
sudo systemctl disable networking.service
sudo systemctl disable ssh.service


sudo apt-get -y purge whoopsie
sudo apt -y remove --purge libreoffice* yelp thunderbird rhythmbox

clear system logs

sudo systemctl stop rsyslog
sudo systemctl disable rsyslog.service
sudo systemctl stop systemd-journald.service
sudo systemctl disable systemd-journald.service
sudo systemctl mask systemd-journald.service
sudo truncate /var/log/*.log --size 0

Delete snap

https://www.baeldung.com/linux/snap-remove-disable

snap --version
snap list
snap remove firefox
snap remove gtk-common-themes
snap remove gnome-3-38-2004
snap remove snapd-desktop-integration
snap remove snap-store
snap remove core20
snap remove bare
snap remove snapd
snap list

sudo systemctl stop snapd
sudo systemctl disable snapd
sudo systemctl mask snapd
sudo apt purge snapd -y
sudo apt-mark hold snapd

rm -rf ~/snap/

Preventing Snap Installation Through the apt Command

sudo cat <<EOF | sudo tee /etc/apt/preferences.d/nosnap.pref
Package: snapd
Pin: release a=*
Pin-Priority: -10
EOF

rm -rf ~/snap
sudo rm -rf /snap
sudo rm -rf /var/snap
sudo rm -rf /var/lib/snapd

Clear bash history

history -c && history -w

Ubuntu power mode

cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
echo performance | sudo tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor