diff --git a/shell_scripts/wiki_link_checking b/shell_scripts/wiki_link_checking
index a6650a0..ce50692 100755
--- a/shell_scripts/wiki_link_checking
+++ b/shell_scripts/wiki_link_checking
@@ -1,7 +1,10 @@
 #! /usr/bin/env bash
+
 # http://fabien.benetou.fr/Wiki/ToDo#Maintenance
 # TODO
+#	add incremental option to use with batch
 #	generalize for other URLs
+
 if [ $# -lt 1 ]
 then
   echo "Check page per page against dead links for PmWiki"
@@ -11,6 +14,10 @@ fi
 PATH=$1
 NOW_EPOCH=$(date +"%s")
 URL=http://fabien.benetou.fr/
+
+# get the last link checked
+# if last or none start from link 1
+
 for PAGE in $(ls $1/wiki.d/* | grep -v PmWiki. | grep -v Site | sed "s/.*wiki\.d\///" | tr "." "/")
 do
  checklink -s $URL/$PAGE > $PATH/pub/checking/$(echo $PAGE|tr "/" ".").check