diff --git a/check_clientbackup b/check_clientbackup
index 6a323a2a0dc068c9123f1b9b00a632529981091d..924c384c66033b94e098e59ac1ac165913987fce 100755
--- a/check_clientbackup
+++ b/check_clientbackup
@@ -16,16 +16,60 @@
 # 2022-08-10  v1.9  <axel.hahn@iml.unibe.ch> FIX: mask the dot in .log
 # 2022-10-21  v1.10 <axel.hahn@unibe.ch>     remove grep: warning: stray \ before white space
 #                                            show last backup, prune, verify
+# 2023-06-22  v1.11  <axel.hahn@unibe.ch>    add help and param support; add parameter for install directory
 # ======================================================================
 
 . $( dirname $0 )/inc_pluginfunctions
 
+self_APPNAME=$( basename $0 | tr [:lower:] [:upper:] )
+self_APPVERSION=1.11
+
 sInstalldir=/opt/imlbackup/client/
-sChecker=$sInstalldir/check_clientbackup.sh
 
+# ----------------------------------------------------------------------
+# FUNCTIONS
+# ----------------------------------------------------------------------
+
+function showHelp(){
+    _self=$(basename $0)
+cat <<EOF
+______________________________________________________________________
+
+$self_APPNAME 
+v$self_APPVERSION
+
+(c) Institute for Medical Education - University of Bern
+Licence: GNU GPL 3
+______________________________________________________________________
+
+Show status of IML backup.
+
+SYNTAX:
+$_self [-d DIRECTORY]
+
+OPTIONS:
+    -h or --help   show this help.
+    -d or --dir    set installation dir of iml backup to find its check skript
+                   default: /opt/imlbackup/client/
+
+EXAMPLE:
+$_self -d /home/backup/imlbackup
+                   set a custom directory und run the backup check
+
+EOF
+}
+
+# --- check param -h
+while [[ "$#" -gt 0 ]]; do case $1 in
+    -h|--help)      showHelp; exit 0;;
+    -d|--dir)       sInstalldir=$2; shift ;shift;;
+    *) echo "ERROR: Unknown parameter: $1"; showHelp; exit 1;
+esac; done
+
+sChecker=$sInstalldir/check_clientbackup.sh
 
 if [ ! -x $sChecker ]; then
-  ph.abort "$sChecker not found - maybe clientbackup is not installed."
+  ph.abort "$sChecker not found - maybe clientbackup is not installed here. Use param -d to set the install directory."
 fi
 
 result=$( $sChecker )