fix link errors

_toc.yml

@@ -135,7 +135,7 @@ chapters:
       - file: infrastructure-guide/infrastructure_administration
       - file: infrastructure-guide/troubleshooting
       - file: infrastructure-guide/initial_setup
-      - file: infrastructure-guide/test-systems
+      - file: infrastructure-guide/test_systems
 
   - file: rhel8/index
     sections:

admin-guide/configuration.md

@@ -19,7 +19,7 @@ Here starts a so far small collections of configuration guides for sysadmins of
 - [RDP Remote Access with XRDP](configuration/xrdp)
 - [Puppent Agent run frequency](configuration/puppet_agent)
 - [Custom sudo Rules](configuration/sudo)
-- [Custom Time Servers](configuration/timeserver)
+- [Custom Time Servers](configuration/ntp_client)
 
 ## Desktop
 - [Keyboard Layout](configuration/keyboard_layout)

infrastructure-guide/test_systems.md

@@ -16,8 +16,8 @@ Then in the root directory you need another symlink from `grub.cfg-01-$MAC` (use
 
 Here we mostly deal with the master:
 
-- Primary [vmonma02a.psi.ch](vmonma02a.psi.ch) (with Director)
-- Secondary [vmonma02b.psi.ch](vmonma02b.psi.ch)
+- Primary [vmonma02a.psi.ch](https://vmonma02a.psi.ch) (with Director)
+- Secondary [vmonma02b.psi.ch](https://vmonma02b.psi.ch)
 
 The schema with all nodes of the test setup you find in the [Monitoring Environment Slides](https://monitoring.psi.ch/icingaweb2/psi-help/pdfs/MonitoringIcinga2.pdf) page 3.