Docs: Fix internal links and remove obsolete admonitions (#8946)

* Fixed a few more links

* Remove old syntax

* Abs-relative links to files in docs folder

* Trying to fix nother doc learn link

* Fix a few more links

* Add testing doc

* Tracking down mysteries

* Cleanup

* Update broken external links

* Remove index.html that appeared from testing

* Fix remainder of links

3 files changed, 7 insertions, 11 deletions

diff --git a/collectors/QUICKSTART.md b/collectors/QUICKSTART.md
index 6a13023296..9a4fdbebab 100644
--- a/collectors/QUICKSTART.md
+++ b/collectors/QUICKSTART.md
@@ -82,7 +82,7 @@ Despite Netdata's auto-detection capabilities, it's important to know how to edi
 
 You should always edit configuration files with the `edit-config` script that comes with every installation of Netdata.
 To edit a collector configuration file, navigate to your [Netdata configuration
-directory](../docs/step-by-step/step-04.md#find-your-netdataconf-file). Launch `edit-config` with the path to the
+directory](/docs/step-by-step/step-04.md#find-your-netdataconf-file). Launch `edit-config` with the path to the
 collector's configuration file.
 
 How do you find that path to the collector's configuration file? Look under the **Configuration** heading in the
@@ -105,7 +105,7 @@ Most collectors are enabled and will auto-detect their app/service without manua
 restart Netdata to trigger the auto-detection process.
 
 To restart Netdata on most systems, use `service netdata restart`. For other systems, see the [other restart
-methods](../docs/getting-started.md#start-stop-and-restart-netdata).
+methods](/docs/getting-started.md#start-stop-and-restart-netdata).
 
 Open Netdata's dashboard in your browser, or refresh the page if you already have it open. You should now see a new
 entry in the menu and new interactive charts!
diff --git a/collectors/freeipmi.plugin/README.md b/collectors/freeipmi.plugin/README.md
index 799d46d1c9..7ea57ed8ac 100644
--- a/collectors/freeipmi.plugin/README.md
+++ b/collectors/freeipmi.plugin/README.md
@@ -163,13 +163,8 @@ You will get verbose output on what the plugin does.
 
 ## kipmi0 CPU usage
 
-There have been reports that kipmi is showing increased CPU when the IPMI is queried.
-
-[IBM has given a few explanations](http://www-01.ibm.com/support/docview.wss?uid=nas7d580df3d15874988862575fa0050f604).
-
-Check also [this stackexchange post](http://unix.stackexchange.com/questions/74900/kipmi0-eating-up-to-99-8-cpu-on-centos-6-4).
-
-To lower the CPU consumption of the system you can issue this command:
+There have been reports that kipmi is showing increased CPU when the IPMI is queried. To lower the CPU consumption of
+the system you can issue this command:
 
 ```sh
 echo 10 > /sys/module/ipmi_si/parameters/kipmid_max_busy_us
diff --git a/collectors/python.d.plugin/oracledb/README.md b/collectors/python.d.plugin/oracledb/README.md
index ca9ee6901f..dbe6505e63 100644
--- a/collectors/python.d.plugin/oracledb/README.md
+++ b/collectors/python.d.plugin/oracledb/README.md
@@ -46,9 +46,10 @@ It produces following charts:
 
 To use the Oracle module do the following:
 
-1.  Install `cx_Oracle` package ([link](https://cx-oracle.readthedocs.io/en/latest/installation.html#install-cx-oracle)).
+1.  Install `cx_Oracle` package ([link](https://cx-oracle.readthedocs.io/en/latest/user_guide/installation.html)).
 
-2.  Install Oracle Client libraries ([link](https://cx-oracle.readthedocs.io/en/latest/installation.html#install-oracle-client)).
+2.  Install Oracle Client libraries
+    ([link](https://cx-oracle.readthedocs.io/en/latest/user_guide/installation.html#install-oracle-client)).
 
 3.  Create a read-only `netdata` user with proper access to your Oracle Database Server.