ProxmoxVE-HelperScripts/misc/update-lxcs.sh

#!/bin/bash
set -e
YW=$(echo "\033[33m")
BL=$(echo "\033[36m")
RD=$(echo "\033[01;31m")
CM='\xE2\x9C\x94\033'
GN=$(echo "\033[1;92m")
CL=$(echo "\033[m")
while true; do
  read -p "This Will Update All LXC Containers. Proceed(y/n)?" yn
  case $yn in
  [Yy]*) break ;;
  [Nn]*) exit ;;
  *) echo "Please answer yes or no." ;;
  esac
done
clear
function header_info {
  echo -e "${BL}
  _    _ _____  _____       _______ ______ 
 | |  | |  __ \|  __ \   /\|__   __|  ____|
 | |  | | |__) | |  | | /  \  | |  | |__   
 | |  | |  ___/| |  | |/ /\ \ | |  |  __|  
 | |__| | |    | |__| / ____ \| |  | |____ 
  \____/|_|    |_____/_/    \_\_|  |______|

${CL}"
}
header_info

containers=$(pct list | tail -n +2 | cut -f1 -d' ')

function update_container() {
  container=$1
  clear
  header_info
  echo -e "${BL}[Info]${GN} Updating${BL} $container ${CL} \n"
  pct exec $container -- bash -c "apt update && apt upgrade -y && apt autoremove -y"
}
read -p "Skip stopped containers? " -n 1 -r
echo
if [[ ! $REPLY =~ ^[Yy]$ ]]; then
  skip=no
else
  skip=yes
fi

for container in $containers; do
  status=$(pct status $container)
  if [ "$skip" == "no" ]; then
    if [ "$status" == "status: stopped" ]; then
      echo -e "${BL}[Info]${GN} Starting${BL} $container ${CL} \n"
      pct start $container
      echo -e "${BL}[Info]${GN} Waiting For${BL} $container${CL}${GN} To Start ${CL} \n"
      sleep 5
      update_container $container
      echo -e "${BL}[Info]${GN} Shutting down${BL} $container ${CL} \n"
      pct shutdown $container &
    elif [ "$status" == "status: running" ]; then
      update_container $container
    fi
  fi
  if [ "$skip" == "yes" ]; then
    if [ "$status" == "status: running" ]; then
      update_container $container
    fi
  fi
done
wait

echo -e "${GN} Finished, All Containers Updated. ${CL} \n"