How do I reset Ubuntu 18.04 to factory defaults?
12343
How can I securely erase a hard drive?
52539
Why can't I choose Ubuntu at boot?
116104
How to change boot splash screen in 18.04
61181
Editing the default boot item in grub menu, a definitive answer?
115953
ifconfig missing after Ubuntu 18.04 install
137947
How to manually manage grub.cfg for Grub2?
57130
Ubuntu 18.04 OVA default credentials
29173
What overwrites /etc/resolv.conf on every boot?
6229
How do I reset GNOME to the defaults?
80842
How to reset the terminal properties and preferences?
118974
How Do I Reset A Manual Installation Of Windows Subsystem For Linux?
55674
How to reset KDE desktop to default on Ubuntu 14.04?
1661
How do I set the default program?
134817
How do I set Ubuntu to my default boot?
99175
How to "undo" SetOptions (restore defaults)?
13154
How to change boot priority?
17193
How do I change the default application for unknown file types?