Please remove Software Sources from the menus, it's destructive.

[Jo-Erlend Schinstad]

We now have four ways of adding a repository; add it as a line in
/etc/apt/sources.list, as a file in /etc/apt/sources.list.d, using
Software Sources in the System > Administration menu, or in Synaptic.
This only serves to confuse users. It is redundant and should be
avoided.

There are also negative consequences of having it in the menus. By
eliminating the need to open Synaptic, we're also eliminating the need
to get to know Synaptic. That's a shame, because it's a really good
package management application. Synaptic has the features of Tasksel
built into it, for instance, and many people don't know that because
they don't know Synaptic. Because people don't know it very well, they
recommend that people open a terminal and run sudo tasksel for tasks
and sudo apt-get install for packages. This in turn leads to guides
that recommend copy-paste of sudo commands. This may lead to security
issues for less advanced users who just want to install some software.
They're being conditioned to use sudo carelessly, and to copy commands
they don't understand and run them as root. This is a disease which we
should fight with all possible means.

Removing the Software Sources menu item, thereby forcing users to open
Synaptic instead, is only a beginning. All wiki pages and help
documents should also refer to Synaptic as the primary way of
installing tasks and packages, and Add/Remove for desktop
applications. Synaptic also lacks the possibility to enter a number of
packages at the same time and install them, like you can do with
apt-get and aptitude. I've filed a bug on that on launchpad:
https://bugs.launchpad.net/ubuntu/+source/synaptic/+bug/194666


Best regards,

Jo-Erlend Schinstad