mokkan
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RHEL4 to RHEL5 upgrade
We would like to upgrade few critical boxes to RHEL4 to RHEL5 and gathering some information. I read few articles and people are recommending to install RHEL5, and then restore the data. Some of the library functions are not working properly when they upgrade? Is it right? I need some confirmation. Thanks in advance.
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Apart from the sreedhar2u suggest, take backup of the data of any application which you are running. Take backup of the database any, if you are running.
The bottom of the line is take full backup of your system.
I would suggest you a very good way.
Instead of installing RHEL5 or 6 on the same machine, use a different machine for the same and restore your data then run and test your application. If you get stuck anywhere then you can immediately swith to your old setup.
The bottom of the line is take full backup of your system.
I would suggest you a very good way.
Instead of installing RHEL5 or 6 on the same machine, use a different machine for the same and restore your data then run and test your application. If you get stuck anywhere then you can immediately swith to your old setup.
ASKER
Thank you for all of your inputs. When I restore, can I overwrite all the /etc/ configuration files by RHEl4 from back, once I have upgraded?
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Thank you for your comments. How do I know what are the files can be overwritten? And what are the files I need to keep? That's the problem.
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I couldn't find release lots of release5, do you have the link? I have it for rhel6.
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How do I know what are the files can be overwritten? And what are the files I need to keep? That's the problem.
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Thank you guys.
ASKER
When you restore, do we only need to restore? Home directory? When it comes to backup and restore, there will be lots of issues. Some of the applications are using using lots /etc/xxxx .conf file etc...
What are the files we need to backup? I know it is depends on the system, but gen really for RHEL4 upgrade what are the filesystems need to backup?