Troubleshooting Linux boot programs in multiple systems

 People who have played the system know that a computer can install multiple operating systems, or can install a variety of different kernel operating systems, my Computer installed 3 systems, namely Windows Xp,win7,redhat Linux Enterprise 5. The status of these systems in Windows, post-install Linux, the first version of the system, after the installation of the new version of the system is not a problem, it can be normal operation, but a long time, do not guarantee that the system is not a problem; Once the Windows system breaks down, we have to redo the Windows system,        We found that the Linux system could not boot, because the boot program was destroyed by Windows Installer and could not access the Linux system. Windows doesn't recognize Linux systems, and Linux systems recognize Windows, which is why Linux is installed first, and now it's impossible to get into a Linux system, but the Linux system is not compromised, and the boot program is destroyed. Unable to enter the system, at this time everyone can think of a way. The worst way is to reinstall the system, which is possible, but the cost is too great; in fact, there is a simple way to insert the Linux system installation disk into the computer, into the Linux first aid mode, repair the Linux system can solve the problem, Here is how to repair the Linux boot program in multiple systems: 1, insert the CD, set the startup entry to CD-ROM mode 2, enter the Linux boot interface: linuxrescue command to enter the next 3, always go the default, do not configure the network card, Let the system automatically find Rhel system on the hard disk 4, the system generally prompts the system on the hard drive has been found and mounted under/mnt/sysimage. Continue loading in read-write mode 5, at the command line input: Chroot/mnt/sysimage6, fdisk-l/dev/sda7, grub-install/dev/sda8, then prompt repair success, After entering the exit command, you can see the familiar Linux boot interface, this time destroyed Linux boot has been repaired, this experiment I just finished, very good oh if you can successfully install multiple systems in a virtual machine, the Ghost Experiment can also be 9 in the virtual machine. And then realize the experiment of ghost double system. Dual operating systems: 1, original XP---original WIN72, GHOSTXP---original win73, Ghostxp---ghost win7 (under test) 4, the same virtual installation of multi-system (no test, no use value) Note: 1, install the system order, first installed winDows, the linux;windows system will not recognize the Linux system, and the Linux system will recognize the Linux system, multi-system installation order is WinXP---win7--linux 2, XP system or win7 system broken, reinstall,   Does not disrupt the normal operation of the Linux system, but will destroy the boot program, this time you have to use the installation disk to the system boot program repair, do not have to re-do Linux system, wasting time

Troubleshooting Linux boot programs in multiple systems