Re: how to update Debian OS properly
On Fri, May 25, 2012 at 11:57:28AM BST, Muhammad Yousuf Khan wrote:
> well, I have questions about upgrading Linux. since i have been using
> Microsoft for years the concept of upgrade I think is different from
> Linux upgrade.
>
> in a testing environment I was trying to upgrade the security patches
> and I run the command
> apt-get upgrade.
> It ran fine, but at the end it upgraded my whole OS, first my test
> machine was showing Debian version 6.0.4 now after the upgrade it
> shifted to Wheezy/SID which I think is unstable.
Read below [0].
> In Microsoft when we upgrade the OS. it downloads only the security
> and OS patches.
>
> So the question are
>
> 1. how to upgrade only the security patches?
aptitude update && aptitude safe-upgrade [1]
> 2. if the upgrade patch trigger any critical issue. Like any service
> like hosting, filesharing or squid got effected by the update, how
> come we know which patch cause this problem and how to remove that
> specific patch because in Microsoft I have seen that security patches
> and OS patches some time make problems when run along with ongoing
> services.
There are no "patches" like in Windows. Patches in free (open source)
software are for source code [2].
Upgrading a package you effectively installing a new version of the
software.
> 3. how to revert back to old OS, for example, in my case i upgraded my
> system from 6.0.4 to Wheezy/SID now want to revert things back.
You can always install an older version of the package.
[0] It seems like you had several entries in your sources.list file(s)
- post the content of your file here.
[1] safe-upgrade will only upgrade packages and won't remove any other
ones
[2] yes, I know, you can have binary patches as well
Cheers,
--
rjc
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