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This article mainly introduces "how to deal with RHEL 5 server system failure". In daily operation, I believe many people have doubts about how to deal with RHEL 5 server system failure. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful for you to answer the doubt of "how to deal with RHEL 5 server system failure". Next, please follow the editor to study!

1. / boot all the following files are lost: (grub, kernel,initrd ramdisk)

1. Start with bootdisk, enter liunx rescue mode, and choose local install or nfs (http) installation mode

two。 Enter mold repair mode:

(1)。 Cd / mnt/sysimage

Check what files are available (if they are empty)

(2) install kernel:

Cd / mnt/source/Server

Rpm-ivh kernel-2.6.18-53.el5.rpm-root=/mnt/sysimage-force

(3) switch /

Chroot / mnt/sysimage

(4) install grub

Grub-install / dev/hda

(5) make initrd ramdisk

Cd / boot

Rm-rf initrd*

Cd / lib/modules

Mkinitrd / boot/initrd-2.6.18-8.el5.img 2.6.18-8

(6) vi / boot/grub/grub.conf

Default=0

Timeout=5

Title Entprise Linux 5.0 2.6.18

Root (hd0,0)

Kernel / vlimuz.2.6.18.el5 ro root=LABEL=/1 rghb quiet

(note: LABEL can be viewed with e2label)

Initrd / initrd-2.6.18-8.el5.img

(7). Exit

(8) reboot

2. / etc/inittab is lost

Failure phenomenon: set in the input Enter runlevel: it will not move

1. Enter rescue mode

2. Chroot / mnt/sysimage

3. Which package rpm-qf / etc/inittab belongs to.

4.exit

5. Cd / mnt/source/Server

Rpm-ivh-replacepkgs-root / mnt/sysimage init.rpm

6.reboot

3. / etc/fstab is lost

Failure phenomenon: starting system logger when detecting mount partition

1. Enter rescue

2.mkdir / test

3.mount root partition

(1)。 Use fdisk-l to view the partition, and then use e2label to view the label name of each partition.

(2) mount / dev/hda6 / test

(3) cd / test

(4) use e2label to check the label name of each partition

Note the regularity: each label name is about the same as the directory name that wants to mout.

(5)。 Refer to the contents of 4 vi / test/etc/fstab

LABEL=/1 / ext3 defaults 1 1

LABEL=/boot / boot ext3 defaults 1 1

LABEL=/usr1 / usr ext3 defaults 1 1

LABEL=/home / home ext3 defaults 0 0

/ dev/hda7 swap swap defaults 0 0

Note: the principle is that three partition must be mount /, / boot,swap.

(4) reboot

At this point, the study on "how to deal with the failure of RHEL 5 server system" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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