Originally Posted by Jennadler
I just ( for the first time) installed something ...
How do I know it finished installing, and what do I do ( just close the window) ?
( it says : ( jenn@jenn - laptop $)
What did you install and how?
Anyway, that is the prompt and it shows up once the previous command ended. If it was unsuccessful then you will probably see some error messages before it ended.
Also, each command returns an "exit code". It's usually 0 for success and some other number for failiure. The exit code of the previous command is stored in the variable "?", so you can check it like this:
(the dollar sign makes the shell treat the following word as a variable rather than literal text)
If you want to learn more about the command line, see the tutorials in my sig.