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Old 04-30-2017, 09:51 AM   #1
komathodi.vijay
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Upgrade to CentOS 6.7 from CentOS 6.3


Pls let us know the procedure to upgrade to CentOS 6.7 from CentOS 6.3 without losing my data.
 
Old 04-30-2017, 10:21 AM   #2
DavidMcCann
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Very simple!
http://www.if-not-true-then-false.co...ade-centos-6/#
 
Old 04-30-2017, 08:13 PM   #3
rknichols
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Quote:
Originally Posted by DavidMcCann View Post
That will now actually take you all the way to version 6.9. Do you have some reason for stopping at the no longer supported version 6.7? That's going to be somewhat more complex, and not recommended.
 
Old 05-01-2017, 07:43 AM   #4
TB0ne
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Quote:
Originally Posted by komathodi.vijay View Post
Pls let us know the procedure to upgrade to CentOS 6.7 from CentOS 6.3 without losing my data.
First, read the LQ Rules about text-speak (and about not using it), then read the "Question Guidelines" link in my posting signature. We're happy to help you with specific problems, but don't ask us to look up how-to guides for you. You could easily find this information on the CentOS website.

Short answer: back your data up, and do a clean install. Mainly because installing 6.7 is pointless...since it's already one major version behind. Install the latest, and for that, you need a clean install.

Since you should already be backing your data up, it shouldn't be a problem.
 
Old 05-01-2017, 11:32 AM   #5
DavidMcCann
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Sorry about the bad advice! I misread 6.7 as 6.9. But, as others have said, why install an old version that's missing a lot of updates, including security ones?
 
Old 05-01-2017, 12:09 PM   #6
rknichols
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CentOS 6 still receives security updates and important bugfixes for ~3 more years. EOL date is March 31, 2020. CentOS 7 is a major leap (systemd, Gnome 3, ...), and a lot of people are holding off on making the switch.
 
Old 05-01-2017, 01:01 PM   #7
sundialsvcs
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The answer to the OP's original question is that you should confidently expect not to "lose your data," since an operating system update replaces only files that are part of the operating system and its related subsystems.

However, you should always maintain current and up-to-date backups, e.g. on an external hard drive. Before updating anything, you should ensure that the backup is completed, then dismount and remove the external drive to a suitably safe place for the interim.

This backup should also include copies of system configuration files, usually found in the /etc/ directory. If the update process does change something wrongly, you need to have an authoritative copy of just how these things used to be ... literally, so you can diff them.

All operating system updates include very extensive "release notes" which discuss the changes that you can expect. In your case, you should obtain the release for 6.4, 6.5, 6.6, and 6.7. "Actually read them," very carefully, giving careful consideration to what is true about your system.

Although you might contemplate performing the update incrementally, "walking up" from your present version step-by-step to your target, this is probably not necessary. (The so-called "manifests" that drive the update process go back a long way.)

Last edited by sundialsvcs; 05-01-2017 at 01:04 PM.
 
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