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Giving Red Hat Linux the Boot
To boot a computer means simply to start it (and to reboot means to restart it). Follow these steps to boot your Red Hat Linux system for the first time:Make sure that your computer is turned off.
Turn on the power to the monitor and then turn on the computer’s main power switch.
After a short time, the Red Hat boot menu appears on your screen. If you have only Red Hat Linux installed on your computer, you are given only one choice of operating systems to boot: Linux.Tip The default operating system is the one at the top of the list. If you have installed Red Hat Linux along with another operating system, you can change the one that boots by default.Tip Linux runs in three different states: 1, 3, and 5 (referred to as run levels). Each run level is used to perform different functions. At Level 1 (also called single-user mode), Linux operates with a minimum of processes so that you can make configuration changes and debug problems. Level 3 is essentially the same as Level 5 except that Level 3 doesn’t run the X server — it’s nongraphical. You typically run servers that don’t need to run graphical applications, such as word processors, at Level 3. Level 5 is the default for personal workstations. You can use GRUB (Grand Unified Bootloader) to select a different Linux run level. When GRUB appears, press e for edit. Three lines appear. Press the down-arrow key to select the line that begins with Kernel. Press the e key again, append a space, and then press either 1, 3, or 5. Press the Enter key and then press the b key. Your computer boots into either single-user mode (1), nongraphical mode (3), or graphical mode (5).
Press the up- and down-arrow keys to highlight the word Linux (if it’s not highlighted already) and press Enter.
If you don’t press anything, the default operating system (Linux sets itself as the default when you install it) starts automatically after a five-second delay.If you’re running more than one operating system (for example, Red Hat Linux and Windows), you can select any of the listed operating systems to boot; we assume here that you choose Linux.After you press Enter, Red Hat Linux boots. During this process, lots of information is displayed on your screen. Red Hat Linux gleans this information as it probes your computer in order to determine what hardware (disk drives and printers, for example) is present.
Because Red Hat Linux is a multiuser system, one or more users can use it at the same time; for example, you can be logged in at the computer console (the attached keyboard and monitor) while someone else is logged in via a network connection). Therefore, you and every other user need a user account in order to use the computer. Each account requires an individual account name and password to protect your information and keep your tasks separate from other people’s tasks.
