Application Management in Linux

I generally do not add packages after installing but find a distribution I like and have all the applications.
This is all due to each application depends on its own libraries.

Things have changed a lot.

There are lot of applications in Linux and they are not streamlined and have problems.

1. Application used to come as packages and Debian and Redhat had their own package management protocols.

2. Ubuntu introduced SNAP system to with own distribution.

3. Then comes the container FLATPAK.

4. Application images in one file.

Sand Boxing is a method used in Linux to restrict access to unauthorized use. In other words plug in security holes.

Packages not coming from recognized package stores may contain scripts that do snooping on your system.
So do not install packages coming from unauthorized sources. That is one way a distribution can become vulnerable to malaware.