Hiii
Yes, I have looked at it and started the installation.
On the link you sent, this is the part where I get stuck.
I get the error message and do not know how to move on. I use Windows.
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WordPress multisite requires to be installed in the default port: 80. For this reason it is necessary on Linux systems to run the installer as root user in Linux machines.
If you see the following error message:
“Unable to bind to the 80 port number. WordPress Multisite only supports this port for the Apache server.”
It is possible that you are not running the installer as root user or is there any other application using this port (for example Skype or a web server). To run the installer as the root user on Linux, you will need to execute it using sudo (for example if you are running Ubuntu) :
sudo /path/to/bitnami-wordpress-VERSION-multisite-linux-installer.run
or become root first with the following command, and then execute the installer:
su -l
If you are using OS X, the installer will ask you for the Administrator password automatically. You can also run the Stack as root user from a Terminal:
$ sudo /path/to/bitnami-wordpress-VERSION-multisite-linux-installer.app/Contents/MacOS/installbuilder.sh