[ubuntu-in] Ubuntu 9.10 + Reliance NetConnect Broadband Modem (Huawei EC1260) + NetworkManager = Works Out Of The Box

[Ramnarayan.K]

man entries for apt-get upgrade and update

 update
           update is used to resynchronize the package index files from their
           sources. The indexes of available packages are fetched from the
           location(s) specified in /etc/apt/sources.list. For example, when
           using a Debian archive, this command retrieves and scans the
           Packages.gz files, so that information about new and updated
           packages is available. An update should always be performed before
           an upgrade or dist-upgrade. Please be aware that the overall
           progress meter will be incorrect as the size of the package files
           cannot be known in advance.

       upgrade
           upgrade is used to install the newest versions of all packages
           currently installed on the system from the sources enumerated in
           /etc/apt/sources.list. Packages currently installed with new
           versions available are retrieved and upgraded; under no
           circumstances are currently installed packages removed, or packages
           not already installed retrieved and installed. New versions of
           currently installed packages that cannot be upgraded without
           changing the install status of another package will be left at
           their current version. An update must be performed first so that
           apt-get knows that new versions of packages are available.


On Sat, Mar 20, 2010 at 1:13 PM, Ramnarayan.K <ramnarayan.k at gmail.com> wrote:
> On Sat, Mar 20, 2010 at 1:02 PM, Mehul Ved <mehul.n.ved at gmail.com> wrote:
>> On Sat, Mar 20, 2010 at 1:08 PM, Ramnarayan.K <ramnarayan.k at gmail.com> wrote:
>>> though Hardik also says
>>> #sudo apt-get upgrade
>>>
>>> and now am not sure this is a good idea, apt-get upgrades tend to
>>> break the system ??
>>
>> Since when? And which other system do you propose to upgrade packages?
>
> who me
>
> well i am runnin Ultimate (Ubuntu 9.10) and its happened in the past
> were other folks have tried to upgrade through the software centre and
> it has resulted in a broken system
>
> Correct me if somethings wrong -
>
> there is a difference between update and upgrade - and often upgrades
> are further up on the hierarchy of  corrected software, like a newer
> version whereas update is an improvement in the existing version.
>
> So if someone has tweaked their system - overs days and months of use,
> this upgrade does something that disrupts other local customizations
> and may (has) even resulted in broken systems
>
> #sudo apt-get upgrade
> is a generic command for whatever repos are enabled in the first place.
> which takes the system to the next level rather then the improvements
> in the existing versions.
>
> which i think is diferent from
> # sudo apt-get dist-upgrade
>
> ram
>