diff --git a/Home.md b/Home.md
index fa2e38f..393ae46 100644
--- a/Home.md
+++ b/Home.md
@@ -22,13 +22,14 @@ These instructions will get you a copy of the project up and running on your loc
 
 Please check the official laravel installation guide for server requirements before you start. [Official Documentation](https://laravel.com/docs/6.x/installation#installation)
 
-Clone the repository
+Create web folder:\
+`sudo mkdir -p /var/www/tethys-app/`
 
-    git clone git@github.com:geolba/tethys.git
+Clone the repository to your web folder:\
+`git clone git@github.com:geolba/tethys.git /var/www/tethys-app/`
 
-Switch to the repo folder
-
-    cd tethys-app
+Switch to the repo folder:\
+`cd /var/www/tethys-app/`
 
 Install all the dependencies using composer
 
diff --git a/installs/PostgreSqlUbuntu.md b/installs/PostgreSqlUbuntu.md
index 980e257..5aabb11 100644
--- a/installs/PostgreSqlUbuntu.md
+++ b/installs/PostgreSqlUbuntu.md
@@ -40,9 +40,42 @@ Retype new password:
 passwd: password updated successfully
 ```
 
-## Accessing PostgreSQL and create TETHYS database
+## CONNECTIONS AND AUTHENTICATION
 
-log in as the postgres user… to do that run the commands below:\
+### postgresql.conf
+
+Most global configuration settings are stored in postgresql.conf, which is created automatically when you install PostgreSQL. Open this file in your preferred text editor:\
+`sudo nano /etc/postgresql/10/main/postgresql.conf`
+
+By default, Postgres only listens on localhost. However, by editing the listen_addresses-section and replacing localhost with an IP, you can force Postgres to listen on another IP. Use '*' to listen on all IP addresses, restrict access via firewall.\
+`listen_addresses= '*'`
+
+### pg_hba.conf
+
+It’s now time to open the (in)famous pg_hba.conf configuration file, located at /etc/postgresql/10/main/pg_hba.conf:
+
+`sudo nano /etc/postgresql/10/main/pg_hba.conf`
+
+HBA stands for host-based authentication. Basically, this file is used to control how PostgreSQL users are authenticated.\
+`host all all 127.0.0.1/32 md5`\
+This line allows "all" users to login using TCP/IP ("host") from the localhost "127.0.0.1/32" to "all" databases, if they succeed in password authentication using the "md5" method. There are more password authentication methods (md5, scram-sha-256, gss, ldap, …) than we can cover, so let’s just get back to simpler examples.
+
+In most cases the access is restricted to localhost and the clients vlan e.g.:
+
+```ini
+# existing entry, allows connections from localhost
+host    all     all    127.0.0.1/32        md5
+
+# new entry to allow connections from 192.168.101.1/24 subnet,
+host    all     all    192.168.101.1/24    md5
+
+# ip of your webserver
+host    all     all   xxx.xxx.xxx.xxx/24    md5
+```
+
+## App setup
+
+let’s connect as the superuser “postgres” to make the changes:\
 `sudo su -l postgres`
 
 Then use the psql command in an interactive shell when you want to create and manage PostgreSQL databases:\
diff --git a/installs/SystemToolsUbuntu.md b/installs/SystemToolsUbuntu.md
index 7e55838..1f5af34 100644
--- a/installs/SystemToolsUbuntu.md
+++ b/installs/SystemToolsUbuntu.md
@@ -2,11 +2,16 @@
 
 ## System Tools
 
-**install git:**
+**install and configure git with your name:**
 
-`sudo apt install git`
+```bash
+sudo apt install git
+git config --global user.name "John Doe"
+git config --global user.email john.doe@example.com
+git config --list --show-origin
+```
 
-**install curl:**
+**other useful tools:**
 
 `sudo apt install curl, unzip`