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Do ThisMake This Change to the Timesaving Bonus InfoDefault Linux Command LineView detailed boot Remove splash=silentfrom Enabling detailed boot messages can help you pinpoint messages (SuSE or the command line.the cause of a boot problem. Mandrake). Make a menu of screen size Add the vga=askoption to the Choose a larger screen resolution to fit more text on the options appear when you end of the command line.screen. If you like a certain text size, you can make the boot.For example: change permanent by changing the menu.lstfile in the grub append> ro root=/boot/grubdirectory. To do so, open the file with your LABEL=/ rhgb vga=askfavorite text editor and append your changes to the linestarting with the word kernel. Save the file when you refinished, and next time you boot, the changes take effect. Be careful when you change this file because it s easy tomake your system hard to boot. Include more details in the Add the word debugto the If you re having problems booting, this is a quick way boot process as the system command line.to find the problem. boots. For example: grub append> ro root= LABEL=/ rhgb debugIf you don t use any USB Add the no usbcommand.You may gain a bit of CPU performance. Warning:Makedevices, you can turn off For example:sure you don t depend on USB devices (like mice) the USB device modules.grub append> ro root=before you disable this module. LABEL=/ rhgb no usbTurn off power-Add the acpi=offcommand You may want to do this if your laptop powers off management to the GRUB command line.intermittently or has battery problems (even when it s control features.For example:plugged in). grub append> ro root= LABEL=/ rhgb acpi=offBoot into a runlevel other Add the runlevel (1 5) to the Server machines typically don t need a graphical environ- than the default.end of the command line.ment most of the time (why run X Windows on a mail or For example: Web server?). Specify the runlevel on the command grub append> ro root=line if you need to do system maintenance work and want LABEL=/ 5friendly desktop environment. See Technique 22 for moreinformation about runlevels. Boot into single-user mode Add an Sto the end of the This is incredibly handy if you forget the rootpassword. without a password.command line. When you re at the command line, you can change the For example:rootpassword with the command sh-2.05b# passwd. grub append> ro root=Enter a new password and confirm the new password when LABEL=/ rhgb S prompted. When you re finished, type the command sh-2.05b# rebootto reboot the system so you can log inwith your newly assigned password. Warning:Anyone canuse the Soption. Be sure you know who has physicalaccess to your computer because with this tidbit of knowl- edge, anyone can bypass the rootpassword. (continued)
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