Entries Tagged 'Linux' ↓

Since I acquired a hosting plan, with the great Dreamhost team, I’ve been creating some websites, experimenting with stuff, login in, login out, via terminal ssh and also using CyberDuck sftp client for Mac. And, even though I use Linux for a while now, sometimes laziness takes his best, and it seems like my brain goes numb! Let me explain… Every time I login on my server space, I type a username (if I’m in the terminal this part is skipped, because local user is the same in the remote server, thereby no need to specify user) and a password. This is cool, if you do it one or two times a day, but if you keep doing this a lot, and have a bunch of servers (working in system administration can do this for you =] ) to login, you will get tired typing all this username/passwords all the time! Believe me… Not to mention the fact that a password scheme, is bad for your security! Why not remove all the need for passwords, and use digital security keys? They are like your normal keys, but one keys does it all! Continue reading →

Now that we know how to change object’s permissions, let’s take a look at how to change object’s ownerships. Like we have already learned, objects can have two types of ownerships: user ownership, and group ownership. We shall learn how to change both individually, and at the same time. Looks boring? Keep reading so I can change your opinion! (or not…)
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To change file permissions, you simply need to know the chmod command. Its simple to learn, and there are two different modes to use it: a symbolic mode and a numeric mode. By now you have some hints, on how to use a little of both, so now we get into detail.
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In the last articles, specially on the ls command one, you have seen examples of listing your files and directories. And if you paid attention, you noticed those weird characters right in the beginning of the line. Well, those funny guys are what is called the file/directory permissions, and are used to control access to all system resources in Linux. Did I get your attention? Good! Keep reading!
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You already heard that Linux is safe, and that there are no virus, no spyware… well, in fact, Linux has one small problem regarding security… YOU! Thats right, problem resides between the keyboard and the chair. So let’s start to look to you system in a safer way, learning how stuff works, and not making mistakes in the future.
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