Good points Gary R.
And even more safety because "hidden extensions" do not exist in the Linux world.
blablabla.pdf.deb can not be mistaken for a pdf-file...
And the"executable bit" that has to be set before a file can execute, even on user level...
And so many more things!
But the most important is that no two Linux distributions are the same.
Greets!
I have no idea what hidden extensions are, nor do I want to know, but I would like to relate one interesting experience.
On my Win 7 machine, I got (and occasionally do get) a suspect email, with a link, that would no doubt, infect my laptop. I've learnt to recognise these and avoid them, because, I'm sure we all know what would happen if I clicked the link.
I decided to forward one such to my Linux machine, ans see what happens.
When it got there and I clicked to open it, it showed a big red warning banner on top, and wouldn't open, but gave me options. I selected the option to open it. It then opened. I clicked on the link, which was obviously malicious.
Nope - nothing happened, other that more warning signs and immediate deletion by my email program / Linux.
So how's THAT ???
Had I done this in Windows, it would now be infected.