read_urandom: /dev/urandom: open failed: No such file or directory

My CentOS Linux based server failed to boot with the following error:

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read_urandom: /dev/urandom: open failed: No such file or directory

How do I fix this problem?

To fix this problem you need to upgrade mkinitrd package. To upgrade package use the Internet or install it using rpm command:
# yum update mkinitrd
Finally, build the image:
# mkinitrd -v -f /boot/initrd-2.6.18-194.el5.img 2.6.18-194.el5
Reboot the server:
# reboot

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