330 Part III . Choosing and Installing a (Web site optimization)
330 Part III . Choosing and Installing a Linux Distribution . Defines network services With a connection to your LAN or WAN, YaST provides some helpful graphical tools for configuring some services that can be unintuitive to configure from the command line. . Changes security settings Security settings in Linux are often among the most unintuitive features to configure, while at the same time being among the most important. Although features such as iptables work great for most Linux gurus for setting up a firewall, people who are accustomed to graphical interfaces may find them challenging. From the YaST Security and Users selection, the Firewall icon enables you to step through your network interfaces and add access to those services you want by name (such as Web Server, Mail Server, and Other Services) or by port number. It even enables you to do initial setup of more complex firewall features, such as packet forwarding, IP Masquerading, and logging. To make your way around the graphical YaST interface, you need only to click the mouse and use the Tab key to move between fields. For the text-based YaST interface, you can use the Tab and arrow keys to move among the selections and the Enter key to select the currently highlighted item. RPM Package Management Like Red Hat Linux, SUSE packages its software using the RPM package management file format and related tools. RPM contains a lot of features for adding, removing, and managing software in SUSE. Although software packages in the Red Hat and SUSE distributions are different, the tools you use for managing packages in those two distributions are the same. You use the rpm utility to work with RPM software packages. Here s a list of some of its features: . Installing local or remote packages You can use the rpm command to add a software package to SUSE, and rpm doesn t care if the package is in the local directory, CD, or remote computer (providing you have network access to that computer). A remote package can be available on a Web server (http://) or FTP server (ftp://). Here s an example of using an rpm command to install a software package from an FTP server: # rpm -iv ftp://ftp.linuxtoys.net/pub/suse/10.0/abc.i586.rpm In this example, the -i option says to install the package, and the -v option says to give verbose output as the package is installed. The fictitious package (abc.i586.rpm) is installed from an FTP repository. If there are dependency or access issues, rpm informs you and fails. Otherwise, the package is installed. (The -U option is often used instead of the -i option to install RPMs because -U succeeds even if the package is already installed. The -U says to upgrade the package.)
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