Linux init after installation

PROBLEMS #

sudo takes a long time (when network having issues) #

Reason: distros should have added new host name to /etc/hosts, if the name is changed/added during installation ref.

echo -n '127.0.0.1 ' >> /etc/hosts && cat /proc/sys/kernel/hostname >> /etc/hosts

or:

127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 <ADD_YOUR_HOST_NAME>
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 <ADD_YOURS_HERE>

annoying “software updater” #

sudo sed -i 's/1/0/' /etc/apt/apt.conf.d/20auto-upgrades ; cat /etc/apt/apt.conf.d/20auto-upgrades
sudo apt-get remove --auto-remove gnome-software

empty/black screen #

If screen blacked out after 1st reboot, the problem is gfxmode $linux_gfx_mode in grub.
Solutions: (for many servers, see solution 3 directly.)