add details on 15 char hostname limit

admin-guide/more.rst

@@ -6,3 +6,4 @@ More
    :maxdepth: 2
 
    more/network
+   more/hostname

admin-guide/more/hostname.md

@@ -0,0 +1,10 @@
+# Hostname
+
+If keytab files are/need to be use by systems the hostname is limited to 15 characters. More details can be found here:
+- [AdKerberosTroubleshooting](https://wiki.psi.ch/AIT/AdKerberosTroubleshooting)
+- [KeytabFile](https://wiki.psi.ch/AIT/KeytabFile)
+
+A copy of the wiki pages can be found at:
+- [pdf/AdKerberosTroubleshooting.pdf]
+- [pdf/KeytabFile.pdf]
+

infrastructure-guide/home.md

@@ -19,8 +19,6 @@ List of systems and their primary role:
 
 * [metrics00](metrics00) - 129.129.190.226 - Grafana frontend for Influx
 
-* [rocket](rocket) - 129.129.161.234 - Rocket chat server
-
 * [lxsup00](lxsup00) - 129.129.190.24 - Shell for linux support, primarily to run bob
 
 * [satint](satint) - 129.129.160.114 - PSI Satellite server

infrastructure-guide/rocket.md

@@ -1,3 +0,0 @@
-Manually installed following the https://docs.rocket.chat/installation/manual-installation/centos guide.
-
-https is implemented by the use of the httpd as a reverse proxy front-end.