apt.md

apt cache

apt cache policy

Update expired GPG key

apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys EA312927

Disable proxy pipeline

echo "Acquire::http::Pipeline-Depth \"0\";" > /etc/apt/apt.conf.d/00no-pipeline

Get packages and install on new system

dpkg --get-selections | grep 'install$='| awk '{print $1}' > installedpackages
aptitude update
cat installedpackages | xargs sudo aptitude install

dpkg --get-selections > apt-selections.txt
dpkg --set-selections < apt-selections.txt
apt-get -u dselect-upgrade

Reinstall package with config

Search for config file

dpkg -S apache2.conf

Reinstall packages

apt-get -o Dpkg::Options::="--force-confmiss" install --reinstall apache2