macOS Catalina

1. Open your terminal and install the bash-completion package using brew:

brew install bash-completion

2. Adjust your .bash_profile by running in your terminal:

echo "[ -f /usr/local/etc/bash_completion ] && . /usr/local/etc/bash_completion" >> ~/.bash_profile

3. Reload your .bash_profile:

source ~/.bash_profile

Ubuntu server 18.04 LTS

1. Check the Apache2 process status

sudo /etc/init.d/apache2 status 

If you’re seeing an “Active (running)“ message then it means that your Apache2 process is still running and we need to stop it.

2. Stop the Apache2 process

sudo /etc/init.d/apache2 stop

3. Check the Apache2 process status, again.

sudo /etc/init.d/apache2 status

Notice that now, the “Active” section says “inactive“.

4. Uninstall Apache2 by purging.

sudo apt-get purge apache2* -y

5. Verify if anything related to the Apache2 service has been removed

 sudo apt-get autoremove -y

6. Verify if any file or folders have been left on the server.

whereis apache2

If the result/output of the command above is empty, then Apache2 has been successfully uninstalled from your Ubuntu 18.04 LTS.

Assumming your graphical user interface (GUI) hasn’t started after you logged in, you can manually do so by typing the following command:
startx
Now, depending on your X Window System GUI (GNOME, KDE, Unity, etc.), the command above starts your desktop.

OpenVPN is a software compatible with both Windows and Linux, often used in corporations for creating secure connections towards their own internal IT infrastructure.

Install OpenVPN on Ubuntu 18.04/20.04 LTS

Open your Ubuntu terminal and type:

sudo apt-get install openvpn openvpn-systemd-resolved 

Run OpenVPN on Ubuntu 18.04/20.04 LTS

Open your Ubuntu terminal and type:

sudo openvpn --config path-to-openvpn-config-file.ovpn

After running OpenVPN, the system will require you to enter your local super user (if prompted) and after that, for your OpenVPN user and password.

Whenever I’d leave my computer open for more than 30-40 minutes without touching it, I’d always find it locked or with my VPN disconnected (which is really frustrating, especially when working remotely).

macOS

The command below will disable sleeping on your computer and it will keep it awake even if your laptop is not connected to a power source. So, open your terminal and type:

sudo pmset sleep 0