Merge branch 'docs-repo-merge-11-admin-ops-ee' into 'master'

Docs: (EE Port) Merge EE doc/administration/operations to CE

See merge request gitlab-org/gitlab-ee!11647

doc/administration/operations/fast_ssh_key_lookup.md

@@ -30,14 +30,14 @@ instructions will break installations using older versions of OpenSSH, such as
 those included with CentOS 6 as of September 2017. If you want to use this
 feature for CentOS 6, follow [the instructions on how to build and install a custom OpenSSH package](#compiling-a-custom-version-of-openssh-for-centos-6) before continuing.
 
-## Fast lookup is required for Geo
+## Fast lookup is required for Geo **[PREMIUM]**
 
 By default, GitLab manages an `authorized_keys` file, which contains all the
 public SSH keys for users allowed to access GitLab. However, to maintain a
-single source of truth, [Geo](../../gitlab-geo/README.md) needs to be configured to perform SSH fingerprint
+single source of truth, [Geo](https://docs.gitlab.com/ee/administration/geo/replication/index.html) needs to be configured to perform SSH fingerprint
 lookups via database lookup.
 
-As part of [setting up Geo](../geo/replication/index.md#setup-instructions),
+As part of [setting up Geo](https://docs.gitlab.com/ee/administration/geo/replication/index.html#setup-instructions),
 you will be required to follow the steps outlined below for both the primary and
 secondary nodes, but note that the `Write to "authorized keys" file` checkbox
 only needs to be unchecked on the primary node since it will be reflected