Here was the scenario I faced. RHEL4 machine will not boot (according to data center), receives various library not found errors on bootup (Later, I found these errors were from an intruder who tried to install a rootkit, and it didn’t go so well. Most of /bin was corrupt).

The data center recommends that the operating system be reloaded onto a separate disk, which will become the primary, and then mount the old disk as a different mount point for reference / restore. The data center reloaded the operating system, and the customer then found our services online and asked for assistance.

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When running a ‘yum check-update’, I would receive an error. The error continued even after running ‘yum clean all’.

The error is shown below:

# yum check-update
Setting up repositories
core 100% |=========================| 1.1 kB 00:00
updates 100% |=========================| 1.2 kB 00:00
extras 100% |=========================| 1.1 kB 00:00
Reading repository metadata in from local files
primary.xml.gz 100% |=========================| 1.0 MB 00:00
Traceback (most recent call last):
File "/usr/bin/yum", line 29, in ?
yummain.main(sys.argv[1:])

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