Updating redhat 9
Red Hat currently supports only upgrades from Red Hat Enterprise Linux 6 to Red Hat Enterprise Linux 7 for specific/targeted use cases only.
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Packages that have not been updated are a common cause of computer intrusions.
Implement a plan for installing security patches in a timely manner to quickly eliminate discovered vulnerabilities, so they cannot be exploited.
The system would need to be deleted from RHN and re-registered after the upgrade.
Charles, I'm not aware of any personally but this would be a great topic to bring up on the RHEL support community here on the Portal: https://access.redhat.com/groups/red-hat-enterprise-linux Our users there will definitely be able to offer some advice.
This patch is then applied to the Red Hat Enterprise Linux package and tested and released as an erratum update.
If at any time a problem appears to be the result of an in-place upgrade procedure, Red Hat may require you to reinstall the system.
This chapter describes the process of keeping your system up-to-date, which involves planning and configuring the way security updates are installed, applying changes introduced by newly updated packages, and using the Red Hat Customer Portal for keeping track of security advisories.
As security vulnerabilities are discovered, the affected software must be updated in order to limit any potential security risks.
An attacker can easily rebuild a package with the same version number as the one that is supposed to fix the problem but with a different security exploit and release it on the Internet.
If this happens, using security measures, such as verifying files against the original Before installing any security errata, be sure to read any special instructions contained in the erratum report and execute them accordingly.Once the problem is fixed, the package is tested and released as an erratum update.