Updates

Fix the repositories:

• Fixing the repository is important because if the repository is not set up correctly updates will fail or not give you the most up-to-date versions of packages.

1. sudo nano /etc/apt/sources.list
2. Remove the "#" from the start of each repository starting with "deb" or "deb-src". This will uncomment them and make sure that they're included the next time you update. Put a hashtag at the start of all other lines to prevent apt from trying to get an update from a repository without a release file.

Set up automatic updates:

• Automatic updates are important because it ensures that your system has the most up-to-date packages and security fixes.

1. sudo apt install unattended-upgrades (this will most likely be preinstalled)
2. Ensure that it's configured correctly. run the command "sudo nano /etc/apt/apt.conf.d/50unattended-upgrades". Find the line that says "Unattended-Upgrade::Allowed-Origins", and look inside of its curly braces. Uncomment any lines including "${distro_codename}", but keep lines that end with "-proposed" or "-backports" commented. This will ensure that only security and recommended updates will be installed.
3. sudo nano /etc/apt/apt.conf.d/20auto-upgrades. Set each line equal to "1" (with the quotation marks). This will tell it to update and upgrade each day.
4. sudo systemctl enable unattended-upgrades && sudo systemctl start unattended-upgrades