Update SSH-VPN-VNC/connect2jet.sh, SSH-VPN-VNC/README.md files

SSH-VPN-VNC/README.md

@@ -27,6 +27,17 @@ The `-X` option enables X11 forwarding via ssh, i.e., permits opening graphical
 
 If you are a guest, you can apply for a [guest u:account](https://zid.univie.ac.at/uaccount/#c11096). This will give you access to eduroam and to the VPN. Your application needs to be endorsed by a staff member, who also determines the expiration date of the account.
 
+### Connect Script
+If you are using a terminal (Mac, Linux, WSL, ...) you can use the script [connect2jet.sh](connect2jet.sh) like this:
+```bash
+connect2jet.sh -g [U:Account-Username]@login.univie.ac.at [Jet-Username]@jet01.img.univie.ac.at
+```
+There is also an option to forward a port, e.g. the VNC Port:
+```bash
+connect2jet.sh -g [U:Account-Username]@login.univie.ac.at -p 5901 [Jet-Username]@jet01.img.univie.ac.at
+```
+which allows you to connect to `localhost:5901` and view the VNC session. Other gateway servers can be `srvx1.img.univie.ac.at`
+
 ## VNC
 
 **Be aware! Everyone with the VNC password will get access to your account**

SSH-VPN-VNC/connect2jet.sh

+#!/bin/bash
+# By Michael Blaschek
+# Date 18.01.2021
+# CC BY 4.0 International  
+# University of Vienna, Austria
+
+# Description:
+# Connect to Jet via a gateway server
+
+help(){
+	cat << EOF
+$0 -g [gateway] -p [port] user@remote
+Options:
+  -g [gateway]		gateway server, e.g. user@login.univie.ac.at
+  -p [port]			port to forward from jet to local, egv VNC port
+  
+Example:
+   $0 -g [U:Account-Username]@login.univie.ac.at [Jet-Username]@jet01.img.univie.ac.at
+
+EOF
+}
+
+while getopts "g:p:h" flag;
+do
+    case "${flag}" in
+        g ) gateway=${OPTARG}; ;;
+        p ) port=${OPTARG}; ;;
+        h|* ) help; exit 0;;
+    esac
+done
+shift $((OPTIND-1))
+command=""
+remote=$1
+script=$(basename $0)
+
+if [ "${remote}" == "" ]; then
+	echo "Remote host required: [user]@[server]"
+	help
+	exit 1
+fi
+
+if [ -n "${port}" ]; then
+	echo "Forwarding Port: $port"
+	command="-L ${port}:localhost:${port} "
+fi
+
+if [ -n "${gateway}" ]; then
+	echo "$gateway" | grep '@' > /dev/null
+	if [ $? -eq 1 ]; then
+		echo "Please give: [user]@[server], not $gateway"
+		exit 1
+	else
+		echo "Using gateway: $gateway to $remote "
+		ssh $command -t $gateway 'ssh ${command} ${remote}'
+		echo "$(date) | ssh $command -t $gateway 'ssh ${command} ${remote}'" >> .${script/.sh/.log}		
+	fi
+else
+	echo "Direct connection to: ${remote}"
+	ssh ${command} ${remote}
+	echo "$(date) | ssh ${command} ${remote}" >> .${script/.sh/.log}
+fi
+echo "Command Log in  .${script/.sh/.log}"
+
+