fix bugs

db-utils/db_replace_ip.sh

@@ -18,7 +18,7 @@ cd $db_sub_backup_folder
 
 file_count=`ls -l |grep "^-"|wc -l`
 echo "./* file count is $file_count"
-if [ "$file_count" gt 0 ]; then
+if [ "$file_count" -gt 0 ]; then
 	for entry in ./*
 	do
 		echo "is replace ip for db_back_file $entry"