diff --git a/docs/installation/1-postgresql.md b/docs/installation/1-postgresql.md
index f6f217994..d038abb44 100644
--- a/docs/installation/1-postgresql.md
+++ b/docs/installation/1-postgresql.md
@@ -21,8 +21,8 @@ If a recent enough version of PostgreSQL is not available through your distribut
 CentOS 7.5 does not ship with a recent enough version of PostgreSQL, so it will need to be installed from an external repository. The instructions below show the installation of PostgreSQL 9.6.
 
 ```no-highlight
-# yum install https://download.postgresql.org/pub/repos/yum/9.6/redhat/rhel-7-x86_64/pgdg-centos96-9.6-3.noarch.rpm
-# yum install postgresql96 postgresql96-server postgresql96-devel
+# yum install -y https://download.postgresql.org/pub/repos/yum/9.6/redhat/rhel-7-x86_64/pgdg-centos96-9.6-3.noarch.rpm
+# yum install -y postgresql96 postgresql96-server postgresql96-devel
 # /usr/pgsql-9.6/bin/postgresql96-setup initdb
 ```
 
diff --git a/docs/installation/2-redis.md b/docs/installation/2-redis.md
index f9c233869..421225443 100644
--- a/docs/installation/2-redis.md
+++ b/docs/installation/2-redis.md
@@ -9,7 +9,10 @@
 #### CentOS
 
 ```no-highlight
+# yum install -y epel-release
 # yum install -y redis
+# systemctl start redis
+# systemctl enable redis
 ```
 
 You may wish to modify the Redis configuration at `/etc/redis.conf` or `/etc/redis/redis.conf`, however in most cases the default configuration is sufficient.
diff --git a/docs/installation/3-netbox.md b/docs/installation/3-netbox.md
index 1e1964fe7..4ea5a8302 100644
--- a/docs/installation/3-netbox.md
+++ b/docs/installation/3-netbox.md
@@ -11,10 +11,8 @@ This section of the documentation discusses installing and configuring the NetBo
 #### CentOS
 
 ```no-highlight
-# yum install -y epel-release
 # yum install -y gcc python36 python36-devel python36-setuptools libxml2-devel libxslt-devel libffi-devel openssl-devel redhat-rpm-config
 # easy_install-3.6 pip
-# ln -s /usr/bin/python3.6 /usr/bin/python3
 ```
 
 ## Download NetBox
@@ -72,9 +70,12 @@ Checking connectivity... done.
 
 Create a system user account named `netbox`. We'll configure the WSGI and HTTP services to run under this account. We'll also assign this user ownership of the media directory. This ensures that NetBox will be able to save local files.
 
+!!! note
+    CentOS users may need to create the `netbox` group first.
+
 ```
 # adduser --system --group netbox
-# chown --recursive netbox /opt/netbox/netbox/media/`
+# chown --recursive netbox /opt/netbox/netbox/media/
 ```
 
 ## Set Up Python Environment
diff --git a/docs/installation/4-http-daemon.md b/docs/installation/4-http-daemon.md
index 7e19a6b69..fabb270cb 100644
--- a/docs/installation/4-http-daemon.md
+++ b/docs/installation/4-http-daemon.md
@@ -146,7 +146,20 @@ You can use the command `systemctl status netbox` to verify that the WSGI servic
 ...
 ```
 
-At this point, you should be able to connect to the HTTP service at the server name or IP address you provided. If you are unable to connect, check that the nginx service is running and properly configured. If you receive a 502 (bad gateway) error, this indicates that gunicorn is misconfigured or not running.
+At this point, you should be able to connect to the HTTP service at the server name or IP address you provided.
 
 !!! info
     Please keep in mind that the configurations provided here are bare minimums required to get NetBox up and running. You may want to make adjustments to better suit your production environment.
+
+## Troubleshooting
+
+If you are unable to connect to the HTTP server, check that:
+
+* Nginx/Apache is running and configured to listen on the correct port.
+* Access is not being blocked by a firewall. (Try connecting locally from the server itself.)
+
+If you are able to connect but receive a 502 (bad gateway) error, check the following:
+
+* The NetBox system process (gunicorn) is running: `systemctl status netbox`
+* nginx/Apache is configured to connect to the port on which gunicorn is listening (default is 8001).
+* SELinux is not preventing the reverse proxy connection. You may need to allow HTTP network connections with the command `setsebool -P httpd_can_network_connect 1`