Sure, it does come from the repositories.
Have a look here: https://help.ubuntu.com/community/Repositories/Ubuntu

Also, the package itself has a maintainer, and some metainformations.

Do this in a terminal to get additional informations:

$ apt-cache show tomcat7

You should get something like this:

Package: tomcat7
Priority: optional
Section: java
Installed-Size: 364
Maintainer: Ubuntu Developers <ubuntu-devel-disc...@lists.ubuntu.com>
Original-Maintainer: Debian Java Maintainers
<pkg-java-maintain...@lists.alioth.debian.org>
Architecture: all
Version: 7.0.52-1
Depends: tomcat7-common (>= 7.0.52-1), ucf, adduser, debconf (>= 0.5) |
debconf-2.0
Recommends: authbind
Suggests: tomcat7-docs (>= 7.0.52-1), tomcat7-admin (>= 7.0.52-1),
tomcat7-examples (>= 7.0.52-1), tomcat7-user (>= 7.0.52-1),
libtcnative-1 (>= 1.1.24)
Filename: pool/main/t/tomcat7/tomcat7_7.0.52-1_all.deb
Size: 35564
MD5sum: d68cb5bd4d8955d053fc96f324abb7e7
SHA1: 79e7474cb295194f5acaba7be642eb252f5fcbe0
SHA256: d3f342b49fb35902448bfafb85201ede13eb0b64d72548e66f265ea8a9911aa6
Description-fr: Moteur de servlet et JSP
 Apache Tomcat implémente les spécifications Java Servlet et JavaServer
 Pages (JSP) de Sun Microsystems, et fournit un environnement serveur web
 HTTP « pur Java » pour faire fonctionner le code Java.
 .
 Ce paquet contient seulement les scripts de démarrage pour le démon du
 système. Aucune documentation ou application ne sont incluses ici,
 veuillez installer les paquets tomcat7-docs et tomcat7-examples si vous le
 souhaitez. Installez le paquet authbind si vous avez besoin d'utiliser
 Tomcat sur les ports 1-1023. Installez tomcat7-user au lieu de ce paquet
 si vous ne voulez pas que Tomcat démarre en tant que service.
Description-md5: 71d2a54f759941814ab4cf7873094b26
Homepage: http://tomcat.apache.org
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Origin: Ubuntu
Supported: 5y
Task: tomcat-server


If you want to get the source, you can do the following:

sudo apt-get install build-essential
sudo apt-get build-dep tomcat7
apt-get source tomcat7

Then you'll get a directory with the package source (including tomcat
and the patch debian/ubuntu maintainers applied).
Then:

$ cd tomcat7-<version> (whatever the directory is named)
$ dpkg-buildpackage

will build the package from the source you just downloaded.

Regards,
Franck
Le 21/04/2014 07:08, Leo Donahue a écrit :
> 
> On 04/20/2014 08:29 PM, Everton H. P. Custódio wrote:
>> Hi,
>>
>>
>> 2014-04-20 23:43 GMT-03:00 Leo Donahue <donahu...@gmail.com>:
>>
>>> About two weeks into learning linux on Ubuntu 12.04 LTS
>>>
>>> Issuing that command, where does that Tomcat7 come from?
>>>
>>>
>> It comes from Ubuntu's repository. You can check the repositories in
>> 'Software and Updates' options in Ubuntu.
> 
> I'm not sure I see the same thing you are describing.
> 
> Under Ubuntu Software Center, and then from the Edit/Software Sources
> menu there is a dialog showing "Download from" on the Ubuntu Software
> tab which just says "Server for United States".  I have an option to
> pick from several US mirrors.  Tomcat7 could be coming from any one of
> those mirror sites?
> 
> I think I will just stick with using the tar.gz file from the
> tomcat.apache.org site for now until I can get a better feel for this OS.
> 
> Thanks,
> Leo
> 
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