Few security tips ubuntu

Since using ubuntu a few years ago, there was one thing that has always been a question for me, that is about security. The beginning of ubuntu users usually understand about the safety system is almost the same as the spread of the virus. Free virus, the amount of community support, free malware, no longer bluescreen, and free is always sounded. So there is never a moment when a friend who said to use a crossover (other than wine a paid program that can run Windows programs), why must pay, even though it’s a Linux ..

There are various articles that discuss that in a Linux system’s security is generally far above the other operating systems, especially Windows. Since the difference in host management and execution of the program, the benefits of Linux is far superior. But if the attacks really free? Mainly for Ubuntu?

okay, I like your friend, and fix your ubuntu, I will ask password to login, why? you then provide your password, let’s say 123 ***. Entrance to the terminal and sudo blah .. blah ..

With the passwd command then I suppose, can enter to become root in ubuntu you, without you realizing it. For what? because by default, ubuntu does not allow us entry / login with root user. Well, simply, must also think that the user can not change their password. The answer could well ..    But if this is done via a remote process? So that I can also change your password?

All originated from the habit, so these tips may be useful.

Replace your passwords with a password combination of letters and numbers and symbols. Many people still use the original password, because it only uses the PC when surfing alone. Though the Internet is a door.