Correct broken links in docs

docs/source/gallery-jhub-deployments.md

@@ -33,8 +33,7 @@ Please submit pull requests to update information or to add new institutions or
 ### Clemson University
 
 - Advanced Computing
-    - [Palmetto cluster and JupyterHub](https://www.palmetto.clemson.edu)
+    - [Palmetto cluster and JupyterHub](http://citi.sites.clemson.edu/2016/08/18/JupyterHub-for-Palmetto-Cluster.html)
-    - [Docs for JupyterHub on Palmetto cluster](https://www.palmetto.clemson.edu/jupyterhub/docs/) 
 
 ### University of Colorado Boulder
 
@@ -47,7 +46,7 @@ Please submit pull requests to update information or to add new institutions or
     - [Parallel Programming with JupyterHub document](https://www.rc.colorado.edu/book/export/html/833)
 
 - Earth Lab at CU
-    - [Tutorial on Parallel R on JupyterHub](https://earthlab.github.io/tutorials/parallel-r-on-jupyterhub/)
+    - [Tutorial on Parallel R on JupyterHub](https://earthdatascience.org/tutorials/parallel-r-on-jupyterhub/)
 
 
 ### University of Illinois
@@ -63,7 +62,7 @@ Please submit pull requests to update information or to add new institutions or
 
 ### University of Minnesota
 
-- [JupyterHub Inside HPC](http://insidehpc.com/tag/jupyterhub/)
+- [JupyterHub Inside HPC](https://insidehpc.com/tag/jupyterhub/)
 
 ### University of Missouri
 
@@ -71,7 +70,7 @@ Please submit pull requests to update information or to add new institutions or
 
 ### University of Rochester CIRC 
 
-- [JupyterHub Userguide](https://info.circ.rochester.edu/Web_Applicatons/JupyterHub.html) - Slurm, beehive
+- [JupyterHub Userguide](https://info.circ.rochester.edu/Web_Applications/JupyterHub.html) - Slurm, beehive
 
 ### University of California San Diego
 
@@ -104,7 +103,7 @@ Please submit pull requests to update information or to add new institutions or
 
 ### Everware
 
-[Everware](https://github.com/everware) Reproducible and reusable science powered by jupyterhub and docker. Like nbviewer, but executable. CERN, Geneva [website](http://www.everware.xyz/)
+[Everware](https://github.com/everware) Reproducible and reusable science powered by jupyterhub and docker. Like nbviewer, but executable. CERN, Geneva [website](http://everware.xyz/)
 
 
 ### Microsoft Azure

docs/source/quickstart.md

@@ -7,7 +7,7 @@ Before installing JupyterHub, you will need:
 - a Linux/Unix based system
 - [Python](https://www.python.org/downloads/) 3.4 or greater. An understanding
   of using [`pip`](https://pip.pypa.io/en/stable/) or
-  [`conda`](http://conda.pydata.org/docs/get-started.html) for
+  [`conda`](https://conda.io/docs/get-started.html) for
   installing Python packages is helpful.
 - [nodejs/npm](https://www.npmjs.com/). [Install nodejs/npm](https://docs.npmjs.com/getting-started/installing-node),
   using your operating system's package manager. For example, install on Linux

docs/source/services.md

@@ -348,12 +348,14 @@ and taking note of the following process:
    ```
 
 An example of using an Externally-Managed Service and authentication is
-[nbviewer](https://github.com/jupyter/nbviewer#securing-the-notebook-viewer),
+in [nbviewer README]_ section on securing the notebook viewer,
 and an example of its configuration is found [here](https://github.com/jupyter/nbviewer/blob/master/nbviewer/providers/base.py#L94).
-nbviewer can also be run as a Hub-Managed Service as described [here](https://github.com/jupyter/nbviewer#securing-the-notebook-viewer).
+nbviewer can also be run as a Hub-Managed Service as described [nbviewer README]_
+section on securing the notebook viewer.
 
 
 [requests]: http://docs.python-requests.org/en/master/
 [services_auth]: api/services.auth.html
 [HubAuth]: api/services.auth.html#jupyterhub.services.auth.HubAuth
 [HubAuthenticated]: api/services.auth.html#jupyterhub.services.auth.HubAuthenticated
+[nbviewer example]: https://github.com/jupyter/nbviewer#securing-the-notebook-viewer

docs/source/troubleshooting.md

@@ -247,7 +247,7 @@ Users will need a GitHub account to login and be authenticated by the Hub.
 
 ### How do I set up rotating daily logs?
 
-You can do this with [logrotate](http://www.linuxcommand.org/man_pages/logrotate8.html),
+You can do this with [logrotate](https://linux.die.net/man/8/logrotate),
 or pipe to `logger` to use syslog instead of directly to a file.
 
 For example, with this logrotate config file:

jupyterhub/app.py

@@ -307,11 +307,11 @@ class JupyterHub(Application):
     subdomain_host = Unicode('',
         help="""Run single-user servers on subdomains of this host.
 
-        This should be the full https://hub.domain.tld[:port]
+        This should be the full `https://hub.domain.tld[:port]`.
 
         Provides additional cross-site protections for javascript served by single-user servers.
 
-        Requires <username>.hub.domain.tld to resolve to the same host as hub.domain.tld.
+        Requires `<username>.hub.domain.tld` to resolve to the same host as `hub.domain.tld`.
 
         In general, this is most easily achieved with wildcard DNS.
 

jupyterhub/services/auth.py

@@ -136,7 +136,7 @@ class HubAuth(Configurable):
     api_url = Unicode(os.getenv('JUPYTERHUB_API_URL') or 'http://127.0.0.1:8081/hub/api',
         help="""The base API URL of the Hub.
 
-        Typically http://hub-ip:hub-port/hub/api
+        Typically `http://hub-ip:hub-port/hub/api`
         """
     ).tag(config=True)
     @default('api_url')
@@ -645,7 +645,7 @@ class HubOAuthCallbackHandler(HubOAuthenticated, RequestHandler):
 
     Finishes the OAuth flow, setting a cookie to record the user's info.
 
-    Should be registered at SERVICE_PREFIX/oauth_callback
+    Should be registered at ``SERVICE_PREFIX/oauth_callback``
 
     .. versionadded: 0.8
     """