TODO: /usr/bin/gtk3-demo check the applying changes page

• preload
• laptop-mode
• pk-update-icon

• Add norelatime to mount options.

• Add discard to mount options.
• cp /usr/share/doc/util-linux/examples/fstrim.{service,timer} /etc/systemd/system
• systemctl enable fstrim.timer

• apt install apparmor apparmor-profiles apprpparmor-utils

* echo 'GRUB_CMDLINE_LINUX_DEFAULT="$GRUB_CMDLINE_LINUX_DEFAULT apparmor=1 security=apparmor"' \ > /etc/default/grub.d/apparmor.cfg

• update-grub

• apt install ufw
• ufw enable