Missing terminal [duplicate]

New to Ubuntu but highly interested, I have a problem with 14.04 in locating the terminal for command lines? As an alternative to GNOME Terminal, which I assumed would have been installed, I have tried to download GUAKE Terminal but am prevented by a repetitive error message indicating that the download 'requires the installation of untrusted packages' for which I have the options of ('OK' or 'Repair'). Activation of either has no effect on subsequent repeats, always linked to my hitting the installation button.

2 Answers

The terminal for the GNOME environment can be opened one of two ways:

1. Applications menu -> Accessories -> Terminal.
2. Keyboard Shortcut: Ctrl+Alt+T

Do either of those get you to a terminal environment?

Guake is in the repository. You can install applications from the repository by using apt-get.

Type this at the command line:

$ sudo apt-get install apt-get

If you get an error during the install, please post the exact error.

Most errors associated with installing applications from the repository can be resolved with this command:

$ sudo apt-get update

By the way you can get to the default terminal (gnome-terminal) by hitting Ctrl + Alt+T. Of course you can also get to the default terminal by typing terminal in the search field of Ubuntu Launch button. xterm is also a terminal that you can use for running commandlines.