Script to update all running LXC-Containers

do_all_containers.sh

#!/bin/bash
containers=$(sudo lxc-ls --running | sed ':a;N;$!ba;s/\n/ /g')

lxc_command="dpkg-reconfigure tzdata"

echo $lxc_command

for container in $containers; do
        echo -e "\e[36m$container\e[0m"
        sudo lxc-attach -n $container -- $lxc_command
done

update_container.sh

#!/bin/bash
containers=$(sudo lxc-ls --running | sed ':a;N;$!ba;s/\n/ /g')
echo $test

for container in $containers; do
        echo -e "\e[36m$container\e[0m"
        echo -e "\e[33mupdate\e[0m"
        sudo lxc-attach -n $container -- apt-get update
        echo -e "\e[33mdist-upgrade\e[0m"
        sudo lxc-attach -n $container -- apt-get dist-upgrade
        echo -e "\e[33mautoremove\e[0m"
        sudo lxc-attach -n $container -- apt-get autoremove --purge
done