+## documentation for end users or services owners
+
+* [how to use RT](https://wiki.debian.org/Teams/DSA/RTUsage)
+* [how to set sudo passwords](user/sudo)
+* [how to request guest access to porter machines](doc/guest-account)
+* [how to use schroot on porter machines](doc/schroot)
+* [how to manage service subdomains](doc/subdomains)
+* [firewalling](doc/firewall)
+
+## documentation for contributors