Update for Alpine Linux LXCs

The script now take a look at the ostype of the LXC and afterwards will choose the right update commands to progress.

misc/update-lxcs.sh

@@ -35,7 +35,14 @@ function update_container() {
   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"
+  pct config $container > temp
+  os=`awk '/^ostype/' temp | cut -d' ' -f2`
+  if [ "$os" == "alpine" ]
+  then
+        pct exec $container -- ash -c "apk update && apk upgrade"
+  else
+        pct exec $container -- bash -c "apt update && apt upgrade -y && apt autoremove -y"
+  fi
 }
 read -p "Skip stopped containers? " -n 1 -r
 echo
@@ -69,4 +76,5 @@ do
  fi 
 done; wait
 
+rm temp
 echo -e "${GN} Finished, All Containers Updated. ${CL} \n"