Updated installation docs

docs/installation/1-postgresql.md

@@ -5,8 +5,6 @@ This section entails the installation and configuration of a local PostgreSQL da
 !!! warning
     NetBox requires PostgreSQL 9.6 or higher. Please note that MySQL and other relational databases are **not** currently supported.
 
-The installation instructions provided here have been tested to work on Ubuntu 18.04 and CentOS 7.5. The particular commands needed to install dependencies on other distributions may vary significantly. Unfortunately, this is outside the control of the NetBox maintainers. Please consult your distribution's documentation for assistance with any errors.
-
 ## Installation
 
 #### Ubuntu
@@ -14,8 +12,8 @@ The installation instructions provided here have been tested to work on Ubuntu 1
 If a recent enough version of PostgreSQL is not available through your distribution's package manager, you'll need to install it from an official [PostgreSQL repository](https://wiki.postgresql.org/wiki/Apt).
 
 ```no-highlight
-# apt-get update
-# apt-get install -y postgresql libpq-dev
+sudo apt update
+sudo apt install -y postgresql libpq-dev
 ```
 
 #### CentOS
@@ -23,9 +21,9 @@ If a recent enough version of PostgreSQL is not available through your distribut
 CentOS 7 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, however you may opt to install a more recent version.
 
 ```no-highlight
-# yum install -y https://download.postgresql.org/pub/repos/yum/reporpms/EL-7-x86_64/pgdg-redhat-repo-latest.noarch.rpm
-# yum install -y postgresql96 postgresql96-server postgresql96-devel
-# /usr/pgsql-9.6/bin/postgresql96-setup initdb
+sudo yum install -y https://download.postgresql.org/pub/repos/yum/reporpms/EL-7-x86_64/pgdg-redhat-repo-latest.noarch.rpm
+sudo yum install -y postgresql96 postgresql96-server postgresql96-devel
+sudo /usr/pgsql-9.6/bin/postgresql96-setup initdb
 ```
 
 CentOS users should modify the PostgreSQL configuration to accept password-based authentication by replacing `ident` with `md5` for all host entries within `/var/lib/pgsql/9.6/data/pg_hba.conf`. For example:
@@ -38,8 +36,8 @@ host    all             all             ::1/128                 md5
 Then, start the service and enable it to run at boot:
 
 ```no-highlight
-# systemctl start postgresql-9.6
-# systemctl enable postgresql-9.6
+sudo systemctl start postgresql-9.6
+sudo systemctl enable postgresql-9.6
 ```
 
 ## Database Creation
@@ -50,8 +48,8 @@ At a minimum, we need to create a database for NetBox and assign it a username a
     **Do not use the password from the example.** Choose a strong, random password to ensure secure database authentication for your NetBox installation.
 
 ```no-highlight
-# sudo -u postgres psql
-psql (10.12 (Ubuntu 10.12-0ubuntu0.18.04.1))
+$ sudo -u postgres psql
+psql (12.5 (Ubuntu 12.5-0ubuntu0.20.04.1))
 Type "help" for help.
 
 postgres=# CREATE DATABASE netbox;
@@ -68,13 +66,16 @@ postgres=# \q
 You can verify that authentication works issuing the following command and providing the configured password. (Replace `localhost` with your database server if using a remote database.)
 
 ```no-highlight
-# psql --username netbox --password --host localhost netbox
+$ psql --username netbox --password --host localhost netbox
 Password for user netbox: 
-psql (10.12 (Ubuntu 10.12-0ubuntu0.18.04.1))
+psql (12.5 (Ubuntu 12.5-0ubuntu0.20.04.1))
 SSL connection (protocol: TLSv1.3, cipher: TLS_AES_256_GCM_SHA384, bits: 256, compression: off)
 Type "help" for help.
 
+netbox=> \conninfo
+You are connected to database "netbox" as user "netbox" on host "localhost" (address "127.0.0.1") at port "5432".
+SSL connection (protocol: TLSv1.3, cipher: TLS_AES_256_GCM_SHA384, bits: 256, compression: off)
 netbox=> \q
 ```
 
-If successful, you will enter a `netbox` prompt. Type `\q` to exit.
+If successful, you will enter a `netbox` prompt. Type `\conninfo` to confirm your connection, or type `\q` to exit.