What I like focus on now is how to install or at least copy Linux to a external HDD much like how you can stall it to a usb thumbdrive and also how to install wireless drivers in Linux.
No big deal as to the first question.
When installing to an external, you have 2 options. The easiest (& safest) way is to simply remove the internal drive (notebook) or unplug both the data & power cables from hard drive or SSD (desktop).
If this is too much work, then during the install process, during the part where you're creating your partitions, there's an option as to which device to install the bootloader to. Do Not select the main partition of your LInux install, select the device. For example, /dev/sda, /dev/sdb, /dev/sdc, are devices. Not /dev/sdc1, that's a partition.
The advise used to be to remove or unplug any drives for protection of the installed OS'(s), then it shifted towards selecting the device. However there's been a few to torch their installs on the internal drive this way, one just a couple of days ago on this very forum. Read my advise, the closing sentence of my post (#38) & then what the OP ended up doing in the very next post (#39).
This is why I've shifted back to if there's doubt, disconnect/remove the installed HDD/SSD for safety.
As to Question #2, Many Linux OS's has the wireless drivers built in. Booting from the LIve DVD or Flash drive will determine this.
Edited by cat1092, 21 July 2014 - 07:43 PM.