add backup sync script

utils/README.md

@@ -34,3 +34,6 @@ Converts a proxy list in specific txt format to a better readable list
 
 ## imageClean.py
 python3 script that takes an input image and cleares spare pixels and bot remains
+
+## backupSync.sh
+shell script that can be launched with backup.js to sync to a storage server after every backup. It uses rsync which is much faster than ftp, sftp or any other methode

utils/backupSync.sh

@@ -0,0 +1,17 @@
+#!/bin/sh
+TMPDIR="/tmp/backup"
+
+#delete older daily backup folders from local filesystem if exist
+cd ${TMPDIR}
+if [ "`ls -t | wc -l`" -gt "1" ]
+  then
+    ls -t | tail -n +2 | xargs rm -rf --
+fi
+cd - > /dev/null
+
+rsync -r ${TMPDIR}/ backup@ayylmao:/backup/pixelplanet/canvas
+
+#clear current daily folder
+#we do NOT delete the daily folder itself, because the backup script would create
+#a new full backup if its missing
+rm -rf ${TMPDIR}/*/*