diff --git a/copy_crashplan_id b/copy_crashplan_id
index 88952d5..e110acb 100755
--- a/copy_crashplan_id
+++ b/copy_crashplan_id
@@ -1,11 +1,11 @@
 #!/bin/bash -e
 #
-# copy_crashplan_id	shell scripts to copy the connection key from a remote
+# copy_crashplan_id  -  shell scripts to copy the connection key from a remote
 #			(e.g. headless) Crashplan instance and setup the local
 #			machine's Crashplan client to connect to it using port
 #			forwarding over an open SSH connection. See also https://support.code42.com/CrashPlan/4/Configuring/Using_CrashPlan_On_A_Headless_Computer
 #
-# Version 1.0, latest version at: https://gitlab.lindenaar.net/scripts/crashplan
+# Version 1.1, latest version at: https://gitlab.lindenaar.net/scripts/crashplan
 #
 # Copyright (c) 2016 Frederik Lindenaar
 #
@@ -24,7 +24,7 @@
 HOST=					# name of machine runnig crashplan
 USER=					# userid to use to login to machine
 					# Leave blank for current user
-SRC_SYSTEM=Linux			# either Linux, Darwin, osx or detect 
+SRC_SYSTEM=Linux			# either Linux, Darwin, osx or detect
 					# Autodetects if blank (ssh conn, slow!)
 
 
@@ -56,13 +56,22 @@ file_location() {
     esac
 }
 
+myname=`basename "$0" .sh`
 
 # determine the connection parameters based on command line and configuration
-if [ $# -gt 2 -o $# -eq 0 -a -z "$HOST" ]; then
-  echo "usage: $0 [user@]hostname [linux|osx|detect]"
-  if [ -n "$HOST" ]; then
-	echo "     or just $0 to copy from $HOST"
-  fi
+if [ $# -gt 2 -o "$1" == "-h" -o "$1" == "--help" -o $# -eq 0 -a -z "$HOST" ]; then
+  cat<<EOH
+
+usage: $myname [user@]hostname [linux|osx|detect]${HOST:+"
+    or just $myname to copy from $HOST"}
+
+Copy the connection key from a remote (e.g. headless) Crashplan instance and
+setup the Crashplan client on local machine to connect to it using SSH port
+forwarding (enable with ssh -L $PORT:$ADDR:4243 <name of Crashplan server>)
+
+See also https://support.code42.com/CrashPlan/4/Configuring/Using_CrashPlan_On_A_Headless_Computer
+
+EOH
   exit 2
 elif [ $# -gt 0 ]; then
   conn=$1
@@ -73,7 +82,7 @@ else
 fi
 
 # ensure the host is reachable
-if ping -o $HOST > /dev/null 2>&1; then
+if ping -c 1 $HOST > /dev/null 2>&1; then
   echo "copying Crashplan connect key from $HOST"
 else
   die "unable to reach host $HOST"
@@ -101,7 +110,6 @@ src=`file_location source "$SRC_SYSTEM"`
 dst=`file_location destination "$os"`
 
 # use script name to generate a temp file name, ensure the temp file is removed
-myname=`basename "$0" .sh`
 tmpfile=`mktemp -t "$myname"`
 trap 'rm -f "$tmpfile"' 0