diff --git a/doc/apache.md b/doc/apache.md
index 8bc0624..0711851 100644
--- a/doc/apache.md
+++ b/doc/apache.md
@@ -9,3 +9,26 @@ sudo apt update
 ```
 sudo apt-get install apache2 --no-install-recommends
 ```
+
+* verify Apache version
+```
+sudo apache2 -version
+```
+
+* check if Apache is running without any issues
+```
+sudo systemctl status apache2
+```
+
+* UFW users can open HTTP (80) and HTTPS (443) ports like this
+```
+sudo ufw allow 80/tcp
+sudo ufw allow 443/tcp
+sudo ufw status
+```
+
+* verify Apache is working in a browser
+```
+hostname -I
+http://<server ip>
+```
diff --git a/doc/cmake.md b/doc/cmake.md
new file mode 100644
index 0000000..7e8ea04
--- /dev/null
+++ b/doc/cmake.md
@@ -0,0 +1,20 @@
+* update cache
+```
+sudo apt update
+```
+
+* install
+```
+sudo apt install cmake --no-install-recommends
+```
+
+* confirm installed version
+```
+cmake --version
+```
+
+* to make use of cmake we might want to install the package ```build-essential```
+```
+sudo apt install build-essential --no-install-recommends
+gcc --version
+```
diff --git a/doc/psql.md b/doc/psql.md
new file mode 100644
index 0000000..65a7b03
--- /dev/null
+++ b/doc/psql.md
@@ -0,0 +1,11 @@
+# Setup Psql Client
+
+* get the latest version of installed packages and refresh the repo cache
+```
+sudo apt update
+```
+
+* install postgres directly from the official repository
+```
+sudo apt-get install postgresql-client --no-install-recommends
+```
diff --git a/readme.md b/readme.md
index 93ae63f..80dd53d 100644
--- a/readme.md
+++ b/readme.md
@@ -2,6 +2,7 @@
 
 * [Apache](doc/apache.md)
 * [Create bootable USB Drive For OS Installation](doc/bootable-usb-drive.md)
+* [Cmake](doc/cmake.md)
 * [Cups](doc/cups.md)
 * [Debian Installation](doc/debian-install.md)
 * [Debian Configuration](doc/debian-config.md)
@@ -25,16 +26,14 @@
 * [Node](doc/node.md)
 * [OneBusAway](doc/onebusaway.md)
 * [Password Manager](doc/pwd-mgmt.md)
+* [RDP Client](doc/rdp.md)
 * [Pip3](doc/pip3.md)
 * [PM2](doc/pm2.md)
 * [Postgres](doc/postgres.md)
-* [RDP Client](doc/rdp.md)
+* [Psql Client](doc/psql.md)
 * [Redis](doc/redis.md)
 * [Rsync](doc/rsync.md)
 * [SSH Server](doc/ssh-server.md)
 * [SSH Public Key Authentication](doc/ssh-pub-key-auth.md)
 * [VPN](doc/vpn.md)
 * [Yarn](doc/yarn.md)
-* To-do List
-  * Reuse
-  * IDE