+ need_packages_lw="software-properties-common apt-transport-https"
+ echo -e "Checking required packages: $need_packages_lw"
+ dpkg -l $need_packages_lw &>/dev/null \
+ || ! echo -e "One or several required packages are not installed. Updating apt cache requires root privileges." \
+ || sudo apt-get -q update \
+ || ! echo "failed to run apt-get update"
+ || exit 1
+ dpkg -l $need_packages_lw &>/dev/null \
+ || ! echo -e "Installing $need_packages_lw requires root privileges." \
+ || sudo apt-get install -y $need_packages_lw \
+ || ! echo "failed to install $need_packages_lw"
+ || exit 1