I am using Ubuntu 12.04 right now. If I use the command sudo apt-get dist-upgrade will that upgrade my Ubuntu to 12.10? Does that mean I won't be using the LTS version after that? I don't want to use Ubuntu 12.10 because I've already tried it and it's very heavy for my netbook.
4 Answers
You can read the man-page of apt-get to see what each command do.
Open the manual
man apt-get
Find the section dist-upgrade and read
dist-upgrade
in addition to performing the function of upgrade, also intelligently handles changing dependencies with new versions of packages; apt-get has a "smart" conflict resolution system, and it will attempt to upgrade the most important packages at the expense of less important ones if necessary. So, dist-upgrade command may remove some packages. The /etc/apt/sources.list file contains a list of locations from which to retrieve desired package files. See also apt_preferences(5) for a mechanism for overriding the general settings for individual packages
See also: What is “dist-upgrade” and why does it upgrade more than “upgrade”?
In order to upgrade Ubuntu to a newer release you have to run in terminal
sudo do-release-upgrade
We read from the man-page
man do-release-upgrade
DESCRIPTION
Upgrade the operating system to the latest release from the command-line. This is the preferred command if the machine has no graphic environment or if the machine is to be upgraded over a remote connection
No, sudo apt-get dist-upgrade will not upgrade to a new Ubuntu release. It will just install available updates for the Ubuntu release you already have installed.
Unlike sudo apt-get upgrade it may install new packages or remove installed packages if that is necessary to satisfy dependencies. So be careful when using it.
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If you do not want to upgrade to non-LTS versions, follow these steps:
Open Ubuntu Software Center.
Go to Edit -> Software Sources.
Go to the Updates tab and make sure you have selected For long-term support versions in the Notify of a new Ubuntu version.

Open a terminal and run
sudo apt-get update(just to be sure :) ).Now, when you run
sudo apt-get dist-upgradeit'd be upgraded to the next LTS version and not non-LTS versions.
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you cannot jump from 12.04 to 13.04 directly you would have to have update manger set to normal then do
sudo apt-get dist-upgrade
or
sudo do-release-upgrade
the difference between the commands is that dist-upgrade wants you to change your config files during the upgrade
they both will upgrade your dist when the time comes sudo apt-get upgrade only upgrades the software on your system it does not install or remove packages like dist-upgrade.
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