What are the safe to remove pre-installed applications?

[sproid]

What are the pre-installed applications safe to remove? Like the apps on the Development category: 'Qt 5 Assistant', 'designer', 'Monodoc' and 'linguistic' apps. The 'Kwalletmanager' app, some apps on the 'PIM setting exporter' or the 'Sieve editor' apps? I don't know if some of those apps are dependent of one another.

[vinnywright]

one way to see what would be removed is to run a simulation on the command line with apt-get ,,,,

vinny@vinny-Bonobo-Extreme:~$ apt search Qt 5 Assistant
Sorting... Done
Full Text Search... Done
coq/artful 8.6-4build3 amd64
 proof assistant for higher-order logic (toplevel and compiler)

eric/artful,artful 17.08-1 all
 full featured Python IDE

qbs-doc/artful,artful 1.8.1+dfsg-4 all
 Qbs documentation

qt5-doc/artful,artful 5.9.1-2 all
 Qt 5 API Documentation

qtcharts5-doc/artful,artful 5.9.1-3 all
 Qt charts QCH documentation

qtspeech5-doc/artful,artful 5.9.1-1 all
 Speech library for Qt - documentation

qttools5-dev-tools/artful,now 5.9.1-2 amd64 [installed]
 Qt 5 development tools

qttranslations5-l10n/artful,artful,now 5.9.1-1 all [installed]
 translations for Qt 5

vinny@vinny-Bonobo-Extreme:~$ apt show qttools5-dev-tools
Package: qttools5-dev-tools
Version: 5.9.1-2
Priority: optional
Section: universe/devel
Source: qttools-opensource-src
Origin: Ubuntu
Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
Original-Maintainer: Debian Qt/KDE Maintainers <debian-qt-kde@lists.debian.org>
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Installed-Size: 7,537 kB
Depends: qtchooser, libc6 (>= 2.14), libqt5core5a (>= 5.9.0~beta), libqt5dbus5 (>= 5.8.0), libqt5designer5 (>= 5.6.0~beta), libqt5designercomponents5 (>= 5.6.0~beta), libqt5gui5 (>= 5.9.0), libqt5help5 (>= 5.9.0), libqt5network5 (>= 5.0.2), libqt5printsupport5 (>= 5.0.2), libqt5quickwidgets5 (>= 5.3.0), libqt5sql5 (>= 5.0.2), libqt5webkit5 (>= 5.6.0~rc), libqt5widgets5 (>= 5.6.0~beta), libqt5xml5 (>= 5.2.0), libstdc++6 (>= 5), qtbase-abi-5-9-0                                                                                 
Recommends: libqt5sql5-sqlite                                                                                                                                                   
Breaks: qtbase5-dev-tools (<< 5.6.0~), qttools5-dev (<< 5.5.0-2~)
Replaces: qtbase5-dev-tools (<< 5.6.0~), qttools5-dev (<< 5.5.0-2~)
Homepage: https://www.qt.io/developers/
Task: kubuntu-desktop, kubuntu-full
Download-Size: 2,143 kB
APT-Manual-Installed: yes
APT-Sources: http://us.archive.ubuntu.com/ubuntu artful/universe amd64 Packages
Description: Qt 5 development tools
Qt is a cross-platform C++ application framework. Qt's primary feature
is its rich set of widgets that provide standard GUI functionality.
.
This package contains a set of applications to browse the documentation,
translate applications, generate help files and other stuff that
helps in Qt development. These tools are among others:
[COLOR=#ff0000]  * assistant
 * designer
 * linguist
 * pixeltool
 * qdbusviewer[/COLOR]

vinny@vinny-Bonobo-Extreme:~$ sudo apt-get -s remove qttools5-dev-tools
[sudo] password for vinny: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
 drkonqi libcolorcorrect5 linux-headers-4.13.0-21 linux-headers-4.13.0-21-generic linux-image-4.13.0-21-generic linux-image-extra-4.13.0-21-generic
 qml-module-org-kde-qqc2desktopstyle qml-module-qtwebengine
Use 'sudo apt autoremove' to remove them.
The following packages will be REMOVED:
 kinfocenter kubuntu-desktop plasma-desktop plasma-widgets-addons [COLOR=#ff0000]plasma-workspace[/COLOR] qttools5-dev-tools sddm-theme-breeze
0 upgraded, 0 newly installed, 7 to remove and 2 not upgraded.
Remv kubuntu-desktop [1.358]
Remv kinfocenter [4:5.12.0-0ubuntu1~ubuntu17.10~ppa1]
Remv plasma-desktop [4:5.12.0-0ubuntu1~ubuntu17.10~ppa2]
Remv plasma-widgets-addons [4:5.12.0-0ubuntu1~ubuntu17.10~ppa1]
Remv sddm-theme-breeze [4:5.12.0a-0ubuntu1~ubuntu17.10~ppa1]
Remv plasma-workspace [4:5.12.0a-0ubuntu1~ubuntu17.10~ppa1]
Remv qttools5-dev-tools [5.9.1-2]

not safe to remove this !

VINNY

[woodsmoke]

Basically...if you tick things to "uninstall" and then hit 'apply"...and there are a LOT OF THINGS...that it seems that one is pulling out an Ent by root and stem...then...maybe...

go back and UNtick things that were ...

BY THE WRITTEN WORD... connected to the "UNinstall" then ...maybe write those down on a slip of paper and try again...

meaning...just WHAT IS IT...that you are trying to UNinstall...if there are a bunch of "root nerves" that are going to be UNinsttalled than maybe...no...

BUT...if you UNinstall a LOT of "KDE stuff" you will get plain vanilla Ubuntu... it will probably still work...

I have had a lot of "jousts" with people...the posts are buried down with Matilda...

that "Kubuntu" is "just" Ubuntu with KDE "tacked on"...

I aver.

but anyway...

use synaptic...synaptic is your friend...

If synaptic say that your are tearing out Ents by root and stem...then...maybe...

get some pruning shears an work on some branches..lol

woodlikesEntssmoke