diff --git a/Home.md b/Home.md
index ef50234..9ba1605 100644
--- a/Home.md
+++ b/Home.md
@@ -6,12 +6,19 @@
 
 These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See deployment for notes on how to deploy the project on a live system.
 
-### Install required software
+### Step1: install required system tools and programming languages
 
 * [System Tools Installation (Ubuntu)](SystemToolsUbuntu)
-* [Solr](Solr)
 
-## Installation
+### Step 2. install PostgreSQL database:
+
+* [PostgreSQL Installation an database creation (Ubuntu)](SystemToolsUbuntu)
+
+### Step 3. install and configure Solr
+
+* [Solr on Ubuntu](Solr)
+
+### Step 4. Download and Install Tethys:
 
 Please check the official laravel installation guide for server requirements before you start. [Official Documentation](https://laravel.com/docs/6.x/installation#installation)
 
diff --git a/installs/PostgreSQL.md b/installs/PostgreSQL.md
new file mode 100644
index 0000000..af91ae3
--- /dev/null
+++ b/installs/PostgreSQL.md
@@ -0,0 +1,94 @@
+## Install PostgreSQL
+
+`sudo apt install postgresql postgresql-contrib`
+
+response:
+The following additional packages will be installed:\
+  libllvm10 postgresql-12 postgresql-client-12 postgresql-client-common postgresql-common ssl-cert sysstat\
+Suggested packages:\
+  postgresql-doc postgresql-doc-12 libjson-perl openssl-blacklist isag\
+The following NEW packages will be installed:\
+  libllvm10 postgresql postgresql-12 postgresql-client-12 postgresql-client-common postgresql-common\
+  postgresql-contrib ssl-cert sysstat\
+0 upgraded, 9 newly installed, 0 to remove and 10 not upgraded.
+
+After installing PostgreSQL, the commands below can be used to stop, start, enable and check its status:
+
+```bash
+sudo systemctl stop postgresql.service
+sudo systemctl start postgresql.service
+sudo systemctl enable postgresql.service
+sudo systemctl status postgresql.service
+```
+
+Viewing the server version\
+`/usr/lib/postgresql/12/bin/postgres -V`\
+response:\
+postgres (PostgreSQL) 12.2 (Ubuntu 12.2-4)
+
+## Create PostgreSQL Linux User Password
+
+After installing PostgreSQL, it’s a good idea to create / change the default PostgreSQL user password
+
+`sudo passwd postgres`
+
+You should be prompted to create a new Linux password for postgres user.
+
+```bash
+New password:
+Retype new password:
+passwd: password updated successfully
+```
+
+## Accessing PostgreSQL and create TETHYS database
+
+log in as the postgres user… to do that run the commands below:\
+`sudo su -l postgres`
+
+Then use the psql command in an interactive shell when you want to create and manage PostgreSQL databases:\
+`psql`
+
+On psql shell, run below command to change database admin password:\
+`alter user postgres password 'new_db_admin_password';`
+
+Create a admin user called tethys_admin with new password:\
+`postgres=# create user tethys_admin with encrypted password 'new_password_here';`
+
+Create an app user called tethys_app with new password:\
+`postgres=# create user tethys_app with encrypted password 'new_password_here';`
+
+then create a database called tethys via psql:\
+`postgres=# create database tethys;`\
+use postgres ist default owner of db tethys
+
+exit psql:\
+`\q`
+
+and re-login into tethys db:\
+`psql -d tethys -U postgres -p 5432`
+
+create a schemma 'gba' for all tethys tabels with full authorization for the user 'tethys_admin':\
+`tethys=# CREATE SCHEMA IF NOT EXISTS gba AUTHORIZATION tethys_admin;`
+
+grant select, insert, update and delete privileges for the user 'tethys_app':\
+
+```sql
+grant usage on schema gba to tethys_app;
+
+grant select, insert, update, delete on all tables in schema gba to tethys_app;
+alter default privileges for role tethys_admin in schema gba grant select, insert, update, delete on tables to tethys_app;
+
+grant usage on all sequences in schema gba to tethys_app;
+alter default privileges for role tethys_admin in schema gba grant usage on sequences to tethys_app;
+
+grant execute on all functions in schema gba to tethys_app;
+alter default privileges for role tethys_admin in schema gba grant execute on functions to tethys_app;
+```
+
+exit psql:\
+`\q`
+
+switch back to your os user:\
+`exit`
+
+[go mack to main installation](https://github.com/geolba/tethys/wiki#step-4.-download-and-install-tethys)
diff --git a/installs/SystemToolsUbuntu.md b/installs/SystemToolsUbuntu.md
index 528b5e7..30f2c94 100644
--- a/installs/SystemToolsUbuntu.md
+++ b/installs/SystemToolsUbuntu.md
@@ -4,11 +4,11 @@
 
 **install git:**
 
-    sudo apt install git
+`sudo apt install git`
 
 **install curl:**
 
-    sudo apt install curl, unzip
+`sudo apt install curl, unzip'
 
 ## Installation Nginx WebServer
 
@@ -49,11 +49,11 @@ The following NEW packages will be installed:\
   php7.4-curl php7.4-fpm php7.4-gd php7.4-json php7.4-mbstring php7.4-opcache php7.4-pgsql php7.4-readline php7.4-xml php7.4-xsl\
 0 upgraded, 21 newly installed, 0 to remove and 0 not upgraded.
 
-**php settings for nginx:**
+After installing PHP 7.4, run the commands below to open PHP default config file for Nginx...
 
 + Open configuration file:\
 `sudo nano /etc/php/7.4/fpm/php.ini`
-+ Update the configuration file with these and save…
++ Then make the changes on the following lines below in the file and save. The value below are great settings to apply in your environments.
 
 ```ini
 file_uploads = On
@@ -101,3 +101,6 @@ Test your installation:\
 
 + Set adoptopjdk as default java version:\
 `sudo update-alternatives --config java`
+
++ test java installation:\
+`java -version`