For example I have a VM named "centos". Take the VM configuration file /etc/libvirt/qemu/centos.xml
Add the following lines in the configuration file above the disk image of the VM.
Then execute the command virsh and enter the following command.
virsh # define /etc/libvirt/qemu/centos.xml
Domain centos defined from /etc/libvirt/qemu/centos.xml
virsh # start centos
Domain centos started
During booting process press f12 so that you get the booting option and select CDROM. Now that the VM boots with the ISO image and you can do the filesystem recovery process.
fsck -y /dev/mapper/VolGroup00-LogVol00
Reboot the VM and ensure that you are able to access the VM without any file system errors.
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