Update 'README.md'

README.md

@@ -1,3 +1,26 @@
 # phyportal
 
-Desktop application to see IOW server load and connect to IOW and external servers via jupyterlab and xpra
+Desktop application to see IOW server load and connect to IOW and external servers via jupyterlab and xpra
+
+## Building the code
+
+* Get the Lazarus IDE, typically from your Linux distribution or from https://www.lazarus-ide.org/
+* Run the Lazarus ide
+* Open "phyportal.lpi"
+* Click the green run button to build and run the program
+* Later you can run directly without Lazarus
+
+## Prerequisites to run the software
+
+* Connection to IOW
+* a file ~/.ssh/config which contains the following hosts: 
+  * rdpserv 
+  * haumea1 
+  * blogin 
+  * glogin
+* the corresponding keys, which need to be named
+  * ~/.ssh/id_rsa_iow
+  * ~/.ssh/id_rsa_unirostock
+  * ~/.ssh/id_rsa_hlrn
+* at IOW /home/nis/username/.ssh/config, passwordless connections to the phy machines
+* an ssh key manager which allows to add keys using ssh-add