diff --git a/docs/wiki/database-setup/Setup-MySQL-or-MariaDB.md b/docs/wiki/database-setup/Setup-MySQL-or-MariaDB.md
index 246a0a5..00586a5 100644
--- a/docs/wiki/database-setup/Setup-MySQL-or-MariaDB.md
+++ b/docs/wiki/database-setup/Setup-MySQL-or-MariaDB.md
@@ -18,6 +18,11 @@ quit
 
 ## Install required packages:
 ### Red-hat based systems:
+```
+yum install MariaDB-shared mariadb-devel mysql-community-devel
+```
+
+If you use MariaDB ( from [MariaDB repositories](https://mariadb.com/resources/blog/installing-mariadb-10-on-centos-7-rhel-7/) )
 
 ### Debian based systems:
 ```
diff --git a/docs/wiki/database-setup/Setup-PostgreSQL.md b/docs/wiki/database-setup/Setup-PostgreSQL.md
index 40c1287..74af46f 100644
--- a/docs/wiki/database-setup/Setup-PostgreSQL.md
+++ b/docs/wiki/database-setup/Setup-PostgreSQL.md
@@ -53,4 +53,24 @@ docker run --name pdnsadmin-test -e BIND_ADDRESS=0.0.0.0
 -e SQLA_DB_HOST='192.168.0.100' 
 -e SQLA_DB_NAME='powerdns_admin_test' 
 -v /data/node_modules:/var/www/powerdns-admin/node_modules -d -p 9191:9191 ixpict/powerdns-admin-pgsql:latest
-```
\ No newline at end of file
+```
+
+## Install required packages:
+### Red-hat based systems:
+```
+sudo yum install postgresql-libs
+```
+
+### Debian based systems:
+```
+apt install libpq-dev python-dev
+```
+
+### Install python packages:
+```
+pip3 install psycopg2
+```
+
+## Known Issues:
+
+** To fill in **
diff --git a/docs/wiki/install/Running-PowerDNS-Admin-on-Centos-7.md b/docs/wiki/install/Running-PowerDNS-Admin-on-Centos-7.md
index 18d57f6..cee272c 100644
--- a/docs/wiki/install/Running-PowerDNS-Admin-on-Centos-7.md
+++ b/docs/wiki/install/Running-PowerDNS-Admin-on-Centos-7.md
@@ -1,59 +1,43 @@
+# Installing PowerDNS-Admin on CentOS 7
+
 ```
 NOTE: If you are logged in as User and not root, add "sudo", or get root by sudo -i.
 ```
-<br>
 
-**Remove old Python 3.4**<br>
-If you had it installed because of older instructions<br>
-```
-yum remove python34*
-yum autoremove
-```
-<br>
+## Install required packages:
+### Install needed repositories:
 
-## Install required packages
-**Install needed repositories:**
-<br>
 ```
 yum install epel-release
 yum install https://repo.ius.io/ius-release-el7.rpm https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
 ```
 
-**Install Python 3.6 and tools**
+### Install Python 3.6 and tools:
+First remove python 3.4 if installed
+```
+yum remove python34*
+yum autoremove
+```
+
 ```
 yum install python3 python3-devel python3-pip
 pip3.6 install -U pip
 pip install -U virtualenv
 ```
 
-**Install required packages for building python libraries from requirements.txt file**
+### Install required packages for building python libraries from requirements.txt file:
 ```
---> NOTE: I am using MySQL Community server as the database backend.
-          So `mysql-community-devel` is required. For MariaDB,
-          and PostgreSQL the required package will be different.
+yum install gcc openldap-devel xmlsec1-devel xmlsec1-openssl libtool-ltdl-devel
 ```
 
-If you use MariaDB ( from [MariaDB repositories](https://mariadb.com/resources/blog/installing-mariadb-10-on-centos-7-rhel-7/) )
-
-```
-yum install gcc MariaDB-devel MariaDB-shared openldap-devel xmlsec1-devel xmlsec1-openssl libtool-ltdl-devel
-```
-
-If you use default Centos mariadb (5.5)
-```
-yum install gcc mariadb-devel openldap-devel xmlsec1-devel xmlsec1-openssl libtool-ltdl-devel
-```
-
-
-**Install yarn to build asset files + Nodejs 14**
+### Install yarn to build asset files + Nodejs 14:
 ```
 curl -sL https://rpm.nodesource.com/setup_14.x | bash -
 curl -sL https://dl.yarnpkg.com/rpm/yarn.repo -o /etc/yum.repos.d/yarn.repo
 yum install yarn
 ```
-<br>
 
-## Checkout source code and create virtualenv
+### Checkout source code and create virtualenv:
 NOTE: Please adjust `/opt/web/powerdns-admin` to your local web application directory
 
 ```
@@ -68,15 +52,14 @@ Activate your python3 environment and install libraries:
 pip install python-dotenv
 pip install -r requirements.txt
 ```
-<br>
 
-## Running PowerDNS-Admin
+## Running PowerDNS-Admin:
 NOTE: The default config file is located at `./powerdnsadmin/default_config.py`. If you want to load another one, please set the `FLASK_CONF` environment variable. E.g.
 ```bash
 export FLASK_CONF=../configs/development.py
 ```
 
-**Then create the database schema by running:**
+### Create the database schema:
 ```
 export FLASK_APP=powerdnsadmin/__init__.py
 flask db upgrade
@@ -97,4 +80,4 @@ Open your web browser and access to `http://localhost:9191` to visit PowerDNS-Ad
 
 At the first time you login into the PDA UI, you will be redirected to setting page to configure the PDNS API information.
 
-_**Note:**_ For production environment, i would recommend you to run PowerDNS-Admin with gunicorn or uwsgi instead of flask's built-in web server, take a look at WIKI page to see how to configure them.
\ No newline at end of file
+_**Note:**_ For production environment, i would recommend you to run PowerDNS-Admin with gunicorn or uwsgi instead of flask's built-in web server, take a look at WIKI page to see how to configure them.
diff --git a/docs/wiki/install/Running-PowerDNS-Admin-on-Fedora-30.md b/docs/wiki/install/Running-PowerDNS-Admin-on-Fedora-30.md
index bbd9f03..53f1c7c 100644
--- a/docs/wiki/install/Running-PowerDNS-Admin-on-Fedora-30.md
+++ b/docs/wiki/install/Running-PowerDNS-Admin-on-Fedora-30.md
@@ -14,11 +14,6 @@ dnf install python37 python3-devel python3-pip
 ```bash
 dnf install mariadb-devel mariadb-common openldap-devel xmlsec1-devel xmlsec1-openssl libtool-ltdl-devel
 ```
-**Install Postgres dependencies**
-```bash
-$ sudo yum install postgresql-libs
-$ pip3 install psycopg2
-```
 **Install Development tools**
 ```bash
 dnf install gcc gc make
@@ -31,8 +26,6 @@ pip3.7 install -U pip
 ```bash
 pip install -U virtualenv
 ```
-
-
 **Install Yarn for building NodeJS asset files:**
 ```bash
 dnf install npm