Other contributors have said "Is it able to send fax from a Linux machine?" is the same question as "Can you send faxes from Linux?" If you believe that these are not asking the same thing and should be answered differently, click here
Place the material to be faxed in the machine (assuming it is on and connected as required) - make sure it is the correct way up, since otherwise all you send is blank sheets. Then, enter the fax...
A: Yes you can as long as your laptop has the necessary online fax software and you have the online fax account. Any way, when you subscribe for the service you will be provided with online fax...
The easiest way is to just get your standard e-mail client like Thunderbird, Evolution, or KMail. Of course if you want a confusing way of doing things, you can always use MUTT with fetchmail and...