Downgrade CentOS from 6.8 to 6.5

The simplest way would be to restore the entire system drive from the last full backup before the upgrade was done.

I take it there are no full backups?

No full backups.  The system is a test system so not critical.  I just did know if just running the older kernel was enough

What is the cause that leads to the request?
Yes, you can change the boot to use an older kernel.

We are building/compiling software on 6.8 and cannot run of 6.5, so we want to have build system same as "run" system.  Do I need to downgrade packages after booting older kernel?

no need the downgrade the packages,  on the splash start up screen there should be a list of kernel you can choose from.

Thanks Scott, so we are compiling our software with all the updated libraries/packages (glibc,alsa-lib..etc) on the 6.8 system.  So you are saying this is OK to take this compiled software (binaries) and run on 6.5 with no issues?  That's why I was worried about "updated" packages.

It is EXTREMELY rare that a package compiled on one minor version won't run on another minor version....  

The question is why aren't you applying patches to the older systems?

There have been many bad bugs and security issues repaired between 6.5 release and now...

Or at least applying the serious issue patches on a test system and testing first...


Running "yum-update" is all it takes to bring a system current, and is usually better than letting them run unpatched...

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