nixCraft

Hai,

Just wondering what is the best way to Migrate a web server Red Hat Enterprise Linux version 4 from version 3.

How do I migrate to Red Hat Enterprise Linux version 4 from version 3?

TIA

You can upgrade from RHEL 4 installer itself. But don't use RHEL automated installer. It sucks like hell. I have very bad experience with Anaconda.

I have updated several times using following method
Backup all data

1. Backup all configuration files from /etc and software specific such as postfix and Apache
2. Backup user database (/etc/passwd and shadow group files http://www.cyberciti.biz/faq/howto-m...to-new-server/)
3. Backup user emails
4. Backup user /home dir

Once everything is backed up - do as follows -

1. Format existing drive
2. Install a clean system using RHEL 4 CD or network installation
3. Run up2date via RHN
4. Install needed application software such as apache, postfix etc
5. Configure security
6. Restore user database
7. Restore software specific configuration data and config file
8. Restore user emails
9. Restore user /home data
10. Reboot and test
11. Finally run up2date to patch it again

See Move or migrate user accounts from old Linux server to a new Linux server => http://www.cyberciti.biz/faq/howto-m...to-new-server/
Hope this method solves your problem.

Good luck!

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Vivek Gite
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Excellent as usual! Thanks for info. I shell use manual method.

My friend pointed out to me a gude from Redhat. U can download from redhat.com http://www.redhat.com/f/pdf/rhel4/UpgradeGuidelines.pdf