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Once your partitions are prepared, you install a boot loader. You can choose either the LInux LOader (LILO) or the Grand Unified Boot loader (GRUB). GRUB is now the default boot loader. You use a boot loader to start Red Hat Linux from your hard drive. You can also use it to start any other operating system you may have installed on your computer, such as Windows. You have two choices for where to install the boot loader: the Master Boot Record (MBR) or the root partition. The recommended place is the MBR. The Boot Loader Configuration screen lists various boot loader options. Here you can select where to install boot loader (MBR or root partition), specify a label for the Linux system (usually linux), decide whether it is to be the default system (if you have more than one operating system), and specify any kernel parameters your system may require for Linux. At the top of the screen are options for creating a boot disk selecting either the GRUB or LILO boot loaders, and not to install a boot loader. GRUB will be selected by default. The boot disk creation option is also automatically selected for you. You can use the boot disk to start your Linux system should there ever be a problem starting from your hard drive (for example, if you reinstall Windows on your hard drive, the boot loader is removed and you will need to use the boot disk to start Linux so that you can reinstall the boot loader). The bottom of the screen displays a list of bootable partitions. Selecting one enables you to enter specific information for the partition in the top pane, such as the label you want to give to this partition and any kernel parameters required. The root or boot linux partition is usually given the label "linux"; a Window partition could be given a label like "win."
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The Network Configuration screen displays tabbed panes in the top half for the different network devices on your computer (see Figure 2-2). Click the tab for the device you want to configure. For computers already connected to a network with an Ethernet card, the tab is usually labeled eth0. Such a tab displays a pane with boxes for entering the various IP addresses for the network accessible through this device. These include the device's IP address (usually your computer's IP address), the network's address, and the broadcast address, along with the netmask. You could have a computer with several Ethernet devices, each connected to a different (or the same) network. If your network supports DHCP, you can click the DHCP button instead of manually entering in these addresses. DHCP automatically provides your computer with the needed IP addresses. You can also choose to have the device activated when your system boots or not.
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Figure 2-2: Network configuration The bottom pane holds boxes for entering the IP addresses for your network's domain name servers (DNS) and gateway computer, as well as the hostname you want to give to your system. In the Hostname box, enter the fully qualified domain name for your computer. Next, the Firewall Configuration screen lets you create basic default levels of network security. You can choose a high, medium, or low level of security. You can opt to use default firewall rules or customize your configurations specifying trusted devices and services to allow, such as Web or FTP connections. On Red Hat 7.2, the Firewall Configuration still implements older IP-Chains firewall rules. If you plan to use the newer IP-Tables, you will have to remove this configuration first (see s 6 and 40). The next screen lets you choose the language you want to use. On the Time Zone Configuration screen, you have the option of setting the time by using a map to specify your location or by using Universal Coordinated Time (UTC) entries. On the Account Configuration screen, you can set the root password for the root account on your system. This is the account used for system administration operations, such as installing software and managing users. On this same screen, you can also add ordinary user accounts. Click the Add button to create the account. A dialog is opened with entries for the user name, the user's full name, the password, and the password confirmation. Once you have entered in the information and clicked OK, the new user will be listed. Use the Edit button to change entries and the Delete button to remove users. On the Authentication Configuration screen, you can add further levels of security for passwords. MD5 allows for long passwords up to 256 characters and shadow passwords that will save password information in a secure file on your system. There are tabbed panels for enabling different kinds of authentication services along with specifying their servers. There are panels for NIS, LDAP, Kerberos, and SMB. On the NIS (Network Information Service)
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panel, you can enable NIS and enter your NIS domain. On the LDAP panel, you can enable LDAP (Lightweight Directory Access Protocol) and specify your LDAP server if you have one; and on the Kerberos panel, you can enable Kerberos authentication. On the SMB panel, you can specify an SMB server and its workgroup for a Window network. For custom installations, you are presented with a Package Group Selection screen. Here you can choose to install whole sets of packages for different categories. For example, you can install all the packages you would need for the Gnome desktop or the X Window System. To install all packages, select the Everything entry at the end of the list. If you want to select individual software packages, click the "Select individual packages" check box. This will display a new screen with two panes, the left showing an expandable tree of software categories and the right displaying icons for the individual software packages. To select a package for installation, double-click it. You can also single-click, and then click the "Select package for installation" check box below. Whenever you single-click any icon, a description of the package is displayed on the bottom pane. Many software packages require that other software packages also be installed. This is called a dependency. Should you not have these already selected for installation, then an Unresolved Dependencies screen is displayed showing the packages you need to install. You can then select them for installation. The Installing Packages screen is then displayed, which shows each package as it is installed and the progress of the installation. When the installation finishes, the Next button will become active. You can then move on to the Boot Disk Creation screen. Here, you can create a boot disk using a standard floppy disk (or you can elect to skip it).
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