have tableofcontents instead of fixed links

admin-guide/configuration.md

@@ -1,48 +1,4 @@
 # Configuration Guides
 
-Here starts a so far small collections of configuration guides for sysadmins of RHEL installations using Puppet and Hiera.
-
-## Monitoring
-- [Icinga2](configuration/icinga2)
-
-## Software Management
-- [Package Installation](configuration/packages)
-- [Python](configuration/python)
-- [Automated Package Updates](configuration/package_updates)
-- [Selecting Package Repositories](configuration/package_repositories)
-- [Managing Services with Systemd](configuration/services)
-
-## Basic Setup
-- [Mounting Volumes](configuration/mount)
-- [Distribute Files](configuration/distribute_files)
-- [Resize System Volumes (volume group `vg_root`)](configuration/vgroot)
-- [Network Configuration](configuration/networking)
-- [RDP Remote Access with XRDP](configuration/xrdp)
-- [Puppent Agent run frequency](configuration/puppet_agent)
-- [Custom sudo Rules](configuration/sudo)
-- [Custom Time Servers](configuration/ntp_client)
-
-## Desktop
-- [Keyboard Layout](configuration/keyboard_layout)
-- [Autologin](configuration/autologin)
-- [Screen Lock](configuration/screen_lock)
-- [Banner Message](configuration/banner_message)
-- [Alternative Desktops/Window Managers](configuration/alternative_desktops)
-
-## Logging
-- [Setup Central Logging to Elastic](configuration/central_logging_elastic)
-- [Syslog Forwarding](configuration/syslog_forwarding)
-- [Journald Tuning](configuration/journald)
-
-## Metrics
-- [Metrics Collection - Configuration Telegraf](configuration/metrics_telegraf)
-
-## Special Installations
-- [NTP Server](configuration/ntp_server)
-- [NFS Server](configuration/nfs_server)
-- [SFTP Server](configuration/sftp_server)
-- [SSH Host Hopping as Root (e.g. between cluster members)](configuration/ssh_host_hopping)
-- [Install Citrix VDA](configuration/citrix_vda)
-- [Sending / Relaying Emails](configuration/configuration_email)
-- [SELinux Configuration](configuration/selinux_configuration)
-
+```{tableofcontents}
+```