I'm a brand new user to Ubuntu and need some help installing programs. I can't get them to install and I don't know why. I download them from their websites, such as google chrome download, but after that I can't do anything. I'm starting to think it's because I'm "Trying Ubuntu". Is this true? Thanks for helping! :)
2 Answers
For most applications: Click on the Ubuntu Software Center icon (see below) to install applications. You should rarely, if ever, download software directly from the internet, with Google Chrome being the notable exception. The main reasons for using software from the software-center are stability, security, and compatibility, since it has programs that are built specifically for Ubuntu.
For Google Chrome: You need to download the .deb file from the Chrome website [64 bit .deb (for Debian/Ubuntu)]. It will end up in your Downloads folder. Open Files (Nautilus), go to Downloads, and double-click the .deb file. It will open Ubuntu Software Center and install your program.

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The easiest way to install applications in Ubuntu for me is by opening a terminal and type. Sudo apt-get install application name

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Reading state information... Done Package software-center is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source
E: Package 'software-center' has no installation candidate
– Nick Aug 13 '16 at 18:14