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# yum update
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ro 1 root=/dev/cobd0
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# telinit 3
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libelf?
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# mount -o loop root.img /mnt/tmpdisk/
# yum --installroot=/mnt/tmpdisk -c /mnt/tmpdisk/etc/yum.conf update
# umount root.img
device busy
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# losetup -d /dev/loop0
ioctl: LOOP_CLR_FD: Device or resource busy
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# shutdown -r now
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