diff --git a/bin/lock_user.sh b/bin/lock_user.sh
index a60790b..927c360 100755
--- a/bin/lock_user.sh
+++ b/bin/lock_user.sh
@@ -46,6 +46,8 @@ ssh_allow_group="sshallow";
 ssh_forward_group="sshforward";
 user_group_tpl="gpasswd -d %s %s\ngpasswd -a %s %s\n";
 
+# base folder for all data
+BASE_FOLDER=$(dirname "$(readlink -f "$0")")"/";
 LOG="${BASE_FOLDER}/../log/user_management.log";
 function write_log()
 {