Configuring a simple firewall

You want your computer to be safe from network intruders, but you may not aspire to be a firewall expert. Instead of trying to understand all the ins and outs of iptables or ipchains, Red Hat Linux offers the Configure Firewalling window (also refers to as Lokkit). With Configure Firewalling, you don't need to know how to load rules or memorize port numbers. All you need to do is choose what types of services you want your computer to allow in and out over your network connections. It...

Using the battery status applet

If you are using the GNOME desktop, you can add a Battery Status Monitor to your panel to keep track of the power levels of your battery. The following procedure steps you through adding the monitor to your panel and configuring it to behave as you like 1. Right-click the GNOME panel then select Add to Panel Utility Battery Charge Monitor. If the Battery Charge Monitor applet appears on the panel (which it should), you can stop here if you like. The applet will o Include a battery icon that...

Civilization Call to Power

You can build online civilizations with Civilization Call to Power (CCP). Like earlier versions and public spin-offs (such as the Freeciv described earlier in this chapter), Civilization Call to Power for Linux lets you explore the world, build cities, and manage your empire. This latest version offers multiplayer network competition and extensions that let you extend cities into outer space and under the If you like the Freeciv game that comes with Red Hat Linux, you will love CCP. Engaging...

Understanding Wildmat Characters

When you need to identify newsgroups in your newsfeeds configuration file, you can use several different wildcard characters to simplify the process. These characters are defined on the wildmat man page (type man wildmat). Here's what they do The exclamation point is used to indicate that the newsgroup name that follows should not be matched. * An asterisk at the end of a newsgroup name indicates that all newsgroups following the one shown (those lower in the hierarchy) should be matched. abc...

Red Hat forms the Fedora Project

The announcement of the Fedora Prcoect by Red Hat, Inc. at first it prompted more questions than answers about the future direction of the company and its flagship Red Hat Linux product. In fact, it seemed that nothing named Red Hat Linux even existed anymore. Instead, what was Red Hat Linux would be reflected by Linux distributions coming from two paths Fedora Project (http fedora.redhat.com) An open source proec, beginning from a Red Hat Linux 9 base, that produces its own Linux distribution....

Setting up LAN hardware

Even with a simple LAN, you must make some decisions about network topology (that is, how computers are connected). You must also make some decisions about network equipment (network interface cards, wires, hubs, and so on). Most small office and home LANs connect computers together in one of the following topologies Star topology The star topology is by far the most popular LAN topology. In this arrangement, each computer contains a Network Interface Card (NIC) that connects with a cable to a...

Configuring a shared Samba printer

Your Red Hat Linux printers can be configured as shared SMB printers. To share your printer as though it were a Samba (SMB) printer, all you need to do is configure basic Samba server settings as described in Chapter 18. All your printers should be shared on your local network by default. The next section shows what the resulting settings look like and how you might want to change them. When you configure Samba, as described in Chapter 18, the etc samba smb.conf file is configured to allow all...

Configuring Port Sentry

Chances are that you will want to make some changes to the way that PortSentry runs. To change how PortSentry behaves, modify the etc portsentry portsentry.conf file. In that file, you can choose which ports to monitor, the mode in which to monitor, and the responses to take when a scan is detected. The responses can include Blocking access by the remote computer Rerouting messages from the remote computer to a dead host Adding a firewall rule to drop packets from the remote computer The other...

Index

DaemonPortOptions option, sendmail, sendmail options daemons, Common Linux Features, Disabling network services named starting, Starting the named (DNS) daemon network services, Networking Service Daemons, The xinetd super-server, The init.d start-up scripts NIS client configuration, Configuring NIS client daemons NIS client daemon configuration, Configuring NIS client daemons NIS servers, configuration, Configuring NIS server daemons smbd, Checking the status of shared directories Darwin...

Running DOS applications

Because Linux was originally developed on PCs, a variety of tools were developed to help developers and users bridge the gap between Linux and DOS systems. A set of Linux utilities called mtools lets you work with DOS files and directories within Linux. A DOS emulator called dosemu lets you run DOS applications within a DOS environment that is actually running in Linux (much the way a DOS window runs within a Windows operating system). Mtools are mostly DOS commands that have the letter m in...

Using your camera as a storage device

Instead of using gtkam or gphoto to download pictures to Linux, some digital cameras let you treat them like a storage device to manage pictures. By mounting a digital camera as a USB mass storage device, you can view, copy, delete, and move the pictures on your camera as you would files on a hard disk or CD (just at a lower speed). The following is a partial list of digital cameras that can be used as a USB storage device Casio Supported models QV-2400UX, QV-2x00, QV-3x00, QV-4000 and QV-8000....

Watching TV with Xawtv

The Xawtv program lets you display video output, in particular television channels, on your desktop. You can change the channels, adjust volume, and fine-tune your picture. Added features let you grab still images in PBM or JPEG formats, or capture video clips in AVI. The Xawtv will display, by default, any device producing video on the dev video0 device. Therefore, you can use Xawtv to view Webcams as well as receive television channels. The following sections describe how to choose a TV...

Creating an Image Gallery with Konqueror

There's a neat feature in Konqueror that lets you create a quick image gallery. The feature takes a directory of images, creates thumbnails for each one, and generates an HTML (Web) page. The HTML page includes a title you choose, all image thumbnails arranged on a page, and links to the larger images. Here's how you do it 1. Add images you want in your gallery to any folder (for example, home jake images). Make sure they are sized, rotated, and cropped the way you like before beginning. (Try...

Checkng your PPP connection

To debug your PPP connection or simply to better understand how it works, you can run through the steps below. They will help you understand where information is being stored and how tools can be used to track this information. Checking that your modem was detected It is possible that your modem is not supported under Linux. If that is the case, your PPP connection might be failing because the modem was not detected at all. To scan your serial ports to see where your modem might be, type the...

Using a Digital Camera with gtkam and gphoto2

With the gtkam window, you can download and work with images from digital cameras. The gtkam window is front end to gPhoto2, which provides support for dozens of digital cameras in Linux. The gtkam window works by attaching a supported digital camera to a serial or USB port on your computer. You can view thumbnails of the digital images from the camera, view full-size images, and download the ones you select from the camera to your hard disk. Note If you have a camera that saves images to a...

Using Open Office

Some have called OpenOffice a significant threat to Microsoft's dominance of the desktop market. If a need to work with documents in Microsoft Word format has kept you from using Linux as your desktop computer, OpenOffice is a big step toward removing that obstacle. Note If you are willing to pay a few dollars, CrossOver Office from Codeweavers.com lets you install and run older versions of Microsoft Office 97, 2000, XP, and so on from your Linux desktop. See Chapter 5 for further information...