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Forcefully remove LVM
You may come across the below error while removing an LVM especially with Xen nodes. lvremove -f /dev/xen/vmXXX_img Logical volume xe...
Read-only locking type set. Write locks are prohibited. (LVM)
If you receive the following error while creating the LVM, here is the fix ----------------------------- Read-only locking type set. Wri...
Compile kernel source rpm and biuild with .spec file
Here we are recompiling source rpm with latest linux kernel(kernel.org) (1) Download the source rpm http://repo.smartservermanagement.co...
CentOS Rescue
Rebuilt the madadm . conf and re-configured grub on MBR of sda To rebuild the mdadm.com ==> mdadm --detail --scan >> /etc/ md...
Xen: Create bridge manually with the bond0
ifcfg-eth0 DEVICE=eth0 BOOTPROTO=none ONBOOT=yes MASTER=bond0 SLAVE=yes ISALIAS=no ifcfg-eth1 DEVICE=eth1 BOOTPROTO=none ONBOO...
Migration of Xen Virtual Machines
This is a guide that will help you to transfer Xen PV and Xen HVM virtual servers between nodes SAFELY. This guide explains the best met...
R1Soft Agent Installation
Installing Backup Agent Using YUM ================================ You should configure the YUM repository to manage install and upgrade...
Enable IPv6 on OpenVZ node
This page provides a guideline for setting up IPv6 on a CentOS 6.2 OpenVZ host node. We used SolusVM, but this guide is applicable to any...
Install RPM packages to a Crashed server + RAID (software ) in rescue mode
(1) Boot in to the rescue mode. Since the server have packages dependency problems, it will not allow you to chroot . (2) Configure net...
Perl/Calfbot (spamming script) infection
Perl/Calfbot The presence of a /tmp/... file reveals if a server is infected and the file creation timestamp will accurately reflec...
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Sunday, December 22, 2013
Install grub from rescue mode: Software raid 1
I use CentOS CD and boot into Linuxrescue. From there i fixed master boot record.
1. open grub
2. grub> find /grub/grub.conf
3. This provide some thing like:
(hd0,2)
(hd1,2)
4. root (hd0,2)
5. setup (hd0)
6. root (hd1,2)
7. setup (hd1)
8. quit grub
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