Creating local virtual directory

#Create soft link:
ln -s /path/to/real/folder /path/to/symbolic/link

# Example:
ln -s /path/to/real/folder /var/www/html/symbolic_link
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#add virtual domain to yor local machine (hosts file)

sudo nano /etc/hosts
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# add to follow line and save the file:

127.0.0.1 the-domain-that-you-want-to-add.com

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#configure your apache to work with the new configured domain in the hosts file

sudo nano /etc/apache2/sites-available/000-default.conf
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#add the following configuration

<VirtualHost *:80>

    ServerAdmin your@email.com

    ServerName the-domain-that-you-want-to-add.com

    ServerAlias www.the-domain-that-you-want-to-add.com

    DocumentRoot /var/www/html/symbolic_link

    ErrorLog ${APACHE_LOG_DIR}/error.log

    CustomLog ${APACHE_LOG_DIR}/access.log combined

                <Directory /var/www/html/symbolic_link>

                                Options Indexes FollowSymLinks MultiViews

                                AllowOverride All

                                Order allow,deny

                                allow from all

                </Directory>

</VirtualHost>

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that's it
Now open your browser and navigate to http://the-domain-that-you-want-to-add.com

Upgrading from Linux Mint 17.2 “Rafaela” to Linux Mint 17.3 “Rosa”

ORIGIN : http://sourcedigit.com/17812-linux-mint-17-3-rosa-download-upgrade/

First of all, run the following commands to update the system to the current stable state:

$ sudo apt update
$ sudo apt upgrade
$ sudo reboot

After updating the system, we need to update the distribution code (change the name of the official repositories for Rosa packages). Run the following commands to do so:

$ sudo sed -i 's/rafaela/rosa/' /etc/apt/sources.list
$ sudo sed -i 's/rafaela/rosa/' /etc/apt/sources.list.d/official-package-repositories.list

Finally, run the commands to update the system files and the distribution package:

$ sudo apt update
$ sudo apt upgrade
$ sudo apt dist-upgrade

Once the system-update process is complete, restart the system – manually or use the command “sudo reboot” (without quotes).

Getting the windows serial number from the BIOS while running Linux mint*

Copy & paste (ctrl+shift+V) into your terminal window

sudo hd /sys/firmware/acpi/tables/MSDM 

*Might work on other Linux distributions.