Ubuntu dpkg useful one liners

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Just a little cheat sheet for dpkg

List files in package

$ dpkg -L remmina
/.
/usr
/usr/share
/usr/share/menu
/usr/share/menu/remmina
/usr/share/man
/usr/share/man/man1
/usr/share/man/man1/remmina.1.gz
/usr/share/doc
/usr/share/doc/remmina
/usr/share/doc/remmina/copyright
/usr/share/doc/remmina/changelog.Debian.gz
/usr/bin
/usr/bin/remmina

See installed packages

$ dpkg --get-selections | head
account-plugin-aim				install
account-plugin-facebook				install
account-plugin-flickr				install
account-plugin-google				install
account-plugin-icons				install
account-plugin-identica				install
account-plugin-jabber				install
account-plugin-salut				install
account-plugin-twitter				install

Install packages from machine A to machine B

(A)

dpkg --get-selections > packages.txt

copy packages.txt to machine B

(B)

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