Troubleshooting and Maintenance Well, this unit is going to be about troubleshooting and maintenance of your Linux system and even of your network connectivity. So one of the first goals for us is to talk about Linux in the entire process of it being turned off, turning it on and dealing with any errors you might have in the boot process. We’re going to look at the different portions of the boot process so you understand what’s happening behind the scenes and how you can choose some different run levels…

SSH Daemon Configuration Now opensssh, as we talked about, as one of your options with SSH, does have daemon services or configuration capability to make a server on your machine. Now, some of the nice things about SSH daemons is that you can use those secure connections to be able to help you with other types of nonsecure communication. As an example, there is an option that’s called the X Eleven Forwarding. Now, this is a system that enables you to be able to securely transmit information that normally would…

FTP and Email Services Now, in this unit, we’re going to talk about some other services, not as popular perhaps as the web services, but you could argue that they might be, and that is the FTP and email service. So now, again, our goal is not to get into the nitty gritty about all of these different servers and exchanges and the administration of them, butn how to install them, configure them, and test them, and to make sure we understand how they work. So that’s our goal. We’ll…

Demo – Configuring Apache’s Default Document Well, we’re going to work on changing the default document from index HTML to index HR PHP. But we’re going to have as a backup the original one, which means that we need to edit and we’ll do a little text editing, the Apache default sites configuration file, which was that default file. And remember GM edit, the new edit is going to open it up. In there we go, a nice little text server, or text editor I should say. And we’re going…

Demo – Configuring Apache All right, we’re going to look at the configuration file for Apache. And I’m going to do this by opening up a text editor. You know, I’ve done a lot of VI this, VI that and less this. And so, you know, let’s just go have some fun with one of these other ones. So I’m going to click Open, and in the open we’re going to follow our file system, the Etsy folder folder and Apache two. And we’re going to go to the Apache…

Web Environment All right. Now, in this unit, we’re going to talk about your web environment. What we’re going to do is we’re going to cover the two most popular servers that you have that you’re going to use for any type of framework for your web developers to go in and create a beautiful presentation, either through Java or PHP. That is, we’re going to talk about setting up the Apache web services, followed by the database called MySQL, or some people might say MySQL. Both of these, as…

Traffic Filtering and Marking So now as we think about letting traffic move through our system as an intermediate system being a router, we can also control this flow of traffic through traffic filtering. And we would do that by basically becoming a firewall. Now, in today’s world, firewalls and definitions of firewalls are certainly changing. That is, we have stateful firewalls applicationspecific, firewalls that scan for intrusions and vulnerabilities and a lot of different features. But in the generic meaning of a firewall, we’re really only going to look…

Demo – Exploring User Management Commands All right, let’s take a look at some of these very simplistic commands that we can use and run to take a look at the user accounts on this system. So if I wanted to type in who, what I get to see is some information about who is currently logged in. Now, I see Trainer listed in here twice. Once, it looks like, from a remote connection, and that’s because I have another operating system running that, that they made a connection to…

Topic A: System Security All right, so we’re going to start off by talking about system security and the importance of it. And of course, security is always important. And we’re going to really deal with dealing with our logins and authentication systems to tell you about some options. Now, remember that’s all these are tools. I’m not saying you have to implement everything we talk about. You might not want to, you might not care to. But the more tools you know about them, the better choices you’ve can…

Interoperability All right, so in this unit we’re going to talk about interoperability. What does that mean? It’s a nice way of saying that we want Linux and Windows or somebody else to play well together. So we’re going to look at a tool that was designed, called Samba to be able to do just that and how we can configure it and manage it so that Linux and Windows can talk to each other. We’re then going to get into some other methods of being able to make connections…