Package List Backup And Restoration

Arch Linux

comm -23 <(pacman -Qeq) <(pacman -Qmq) > pkglist

pacman -S --needed $(< pkglist)

Ubuntu

dpkg --get-selections > pkglist

dpkg --set-selections < pkglist
dselect

Fedora

rpm -qa > pkglist

yum -y install $(cat pkglist)