Upgrading to/Installation of Kile 2.1

Ubuntu does not update Kile from 2.1 beta 4 to the latest 2.1 release. In order to update you can do two things.

1) Compile your own like I did with wxMaxima

How to compile Kile for Linux/BSD - http://kile.sourceforge.net/help.php#compile

2) Or find someone that has already compiled a deb package install like I should have looked for one for wxMaxima. (I have found the PPA for wxMaxima here -> Maxima and wxMaxima by István Blahota - https://launchpad.net/~blahota/+archive/wxmaxima as ppa:blahota/wxmaxima and have added it to my original wxMaxima post too.)

In this forum topic, I found a PPA (Personal Package Archive) which once added to the repositories and updated will then install once you run the update manager.

[SOLVED] Kile upgrade - Ubuntu Forums - http://ubuntuforums.org/showthread.php?t=1773808

See here for PPA explanation. I've used it several times without knowing what it was or did. Now I think I understand a little bit better.

How do I use software from a PPA? - https://launchpad.net/+help/soyuz/ppa-sources-list.html

To start installing and using software from a Personal Package Archive, you first need to tell Ubuntu where to find the PPA.

Important: The contents of Personal Package Archives are not checked or monitored. You install software from them at your own risk.

Adding the PPA to Ubuntu 9.10 (Karmic) and later

If you're using the most recent version of Ubuntu (or any version from Ubuntu 9.10 onwards), you can add a PPA to your system with a single line in your terminal.

Step 1: On the PPA's overview page, look for the heading that reads Adding this PPA to your system. Make a note of the PPA's location, which looks like:

ppa:gwibber-daily/ppa

Step 2: Open a terminal and enter:

sudo add-apt-repository ppa:user/ppa-name

Replace ppa:user/ppa-name with the PPA's location that you noted above.

Your system will now fetch the PPA's key. This enables your Ubuntu system to verify that the packages in the PPA have not been interfered with since they were built.

Step 3: Now, as a one-off, you should tell your system to pull down the latest list of software from each archive it knows about, including the PPA you just added:

sudo apt-get update

Now you're ready to start installing software from the PPA!

So in this case do:

sudo add-apt-repository ppa:kile/stable

sudo apt-get update

(launchpad.net link -> Kile - kile stable - https://launchpad.net/~kile/+archive/stable)

Then run the update manager either from the apps (GUI tool - Ubuntu Update Manager) or the terminal in the command line (I don't know the terminal command).

Ah, found it here -> How do I update Ubuntu Linux softwares? - http://www.cyberciti.biz/faq/how-do-i-update-ubuntu-linux-softwares/

sudo apt-get upgrade

From the site:

=> apt-get update : Update is used to resynchronize the package index files from their sources via Internet.

=> apt-get upgrade : Upgrade is used to install the newest versions of all packages currently installed on the system

=> apt-get install package-name : install is followed by one or more packages desired for installation. If package is already installed it will try to update to latest version.