Apt

Update

## update /etc/apt/sources.list
sudo apt-get update
sudo apt-get check
sudo apt-get upgrade
sudo apt-get -s upgrade
sudo apt-get -u upgrade
sudo apt-get dist-upgrade
sudo apt-get -s dist-upgrade
sudo apt-get -u dist-upgrade
sudo apt-get clean
sudo apt-file update

Search

apt-cache search foo

File Search

apt-file update
apt-file search tcl.h

Recovery

apt-get install -f
dpkg --configure -a

Debian Upgrade: Bookworm(12) to Trixie(13)

https://wiki.debian.org/DebianReleases
https://www.debian.org/releases/trixie/release-notes/upgrading.html

Debian Upgrade: Bullseye(11) to Bookworm(12)

https://wiki.debian.org/DebianReleases
https://www.debian.org/releases/bookworm/amd64/release-notes/ch-upgrading.html
https://www.debian.org/releases/bookworm/amd64/release-notes/ch-information.html

## Preparation
sudo apt install zstd

## Start from pure Debian
cat /etc/debian_version
lsb_release -a
apt-forktracer
sudo apt install gpgv
dpkg --audit
#dpkg --get-selections | grep 'hold$'
apt-mark showhold

## Preparing Source List
cd /etc/apt
cat sources.list | sed 's/^/#/g' | sudo tee sources_bullseye.list
cat sources.list | sed 's/^/#/g' | sed 's/bullseye/bookworm/g' | sudo tee sources_bookworm.list
cat sources_bookworm.list | sed 's/^#//g' | sudo tee sources.list

cd /etc/apt/sources.list.d
sudo mkdir -p .archive
for i in *.list ; do
    cat ${i} | sed 's/^/#/g' | sudo tee .archive/${i%.list}_bullseye.list
    cat ${i} | sed 's/^/#/g' | sed 's/bullseye/bookworm/g' | sudo tee .archive/${i%.list}_bookworm.list
    cat .archive/${i%.list}_bookworm.list | sed 's/^#//g' | sudo tee ${i}
done

## Upgrading Packages
sudo apt update
sudo apt -o APT::Get::Trivial-Only=true full-upgrade

sudo apt upgrade --without-new-pkgs
sudo apt full-upgrade

Available Options for Configuration Files:

Install the Package Maintainer's Version
- Original configuration file is copied with post-fix '.ucf-old' to the same location
Keep the Local Version Currently Installed (Default)
- Possible safest way

## Preparing for the Next Release
sudo apt list '~c'
sudo apt purge '~c'

Troubleshooting - Google Cloud

https://www.reddit.com/r/debian/comments/1ck52xg/conflicting_distribution_for_google_cloud_compute/

## W: Conflicting distribution: http://packages.cloud.google.com/apt google-cloud-packages-archive-keyring-bookworm
##  InRelease (expected google-cloud-packages-archive-keyring-bookworm but got google-cloud-packages-archive-keyring-bookworm-stable)
## N: Skipping acquire of configured file 'main/binary-amd64/Packages' as repository
##  'http://packages.cloud.google.com/apt google-cloud-packages-archive-keyring-bookworm InRelease' doesn't support architecture 'amd64'

Comment out the specified line in /etc/apt/sources.list.d/gce_sdk.list

Troubleshooting - Trivial Only

## E: Trivial Only specified but this is not a trivial operation.

This is expected behavior with 'APT::Get::Trivial-Only' enabled and does not indicate a problem
Just check the required disk space at this point

Debian Upgrade: Buster(10) to Bullseye(11)

https://wiki.debian.org/DebianReleases
https://www.debian.org/releases/bullseye/amd64/release-notes/ch-upgrading.html
https://www.debian.org/releases/bullseye/amd64/release-notes/ch-information.html

## Start from pure Debian
cat /etc/debian_version
lsb_release -a
apt-forktracer
dpkg --audit
dpkg --get-selections | grep 'hold$'

## Preparing Source List
cd /etc/apt
cat sources.list | sed 's/^/#/g' | sudo tee sources_buster.list
cat sources.list | sed 's/^/#/g' | sed 's/buster/bullseye/g' | sed 's/\/updates/-security/g' | sudo tee sources_bullseye.list
cat sources_bullseye.list | sed 's/^#//g' | sudo tee sources.list

cd /etc/apt/sources.list.d
sudo mkdir -p .archive
for i in *.list ; do
    cat ${i} | sed 's/^/#/g' | sudo tee .archive/${i%.list}_buster.list
    cat ${i} | sed 's/^/#/g' | sed 's/buster/bullseye/g' | sudo tee .archive/${i%.list}_bullseye.list
    cat .archive/${i%.list}_bullseye.list | sed 's/^#//g' | sudo tee ${i}
done

## Upgrading Packages
sudo apt update
sudo apt -o APT::Get::Trivial-Only=true full-upgrade

sudo apt upgrade --without-new-pkgs
sudo apt full-upgrade