I recently learned that linux does not have any installation wizards. I needed the following software, so I downloaded them and put them in a folder.
As you can see, I've extracted one of them. Now, I'm really confused as to how the installation works.
1) Is it necessary to install these software in specific location only, for them to work, or can they be installed anywhere?
2) How do you use a package manager to install something already downloaded? Will it overwrite any older version of the similar software if I use it?
The reason I'm confused is: Whenever I've needed any software till now, I did
sudo apt-get install software_name
But that was for things like diffuse and firefox. I didn't download diffuse or firefox before that, so
apt-get install seemed to be both downloading and installing. So how do you direct this thing to specifically install what you already downloaded? And if the folder is a tar, you need to first extract it right?