Even if there isn't a cli interface. I would like to be able to launch it/ kill it from command line.
First, find out where your application is. A few directories are in an environment variable
One way to find your app is to open the Menu Editor (right click on the Applications Menu and select Edit Menus) and find the app's command.
The calculator, for example is
It's now running in the foreground. You can pause it by pressing Ctrl+Z, resume it in the background by typing
If you do this with multiple apps, you can use
An App that is in the foreground can be killed with Ctrl+C or Ctrl+\ (if it doesn't react to the former).
A universal way to find your app is to open the File Browser, go to Filesystem → usr → share → applications and to find your app there.
You'll see a bunch of
The Exec entry is what you're interested in here. It's the same you would see if you went to the Menu Editor, just quicker. You can grep the files to search them for your app, if you can't find it.
If the app doesn't have a .desktop file in the applications directory, you have to know it's command of course. Use TAB to get suggestions from just a few letters. Press tab, tab, y to get a huge list of every application.
Even when some applications uses the terminal to monitor the process of a software, there are some other programs that simply run and returns the control to the terminal. So you can close the terminal keeping the application running.
That way, pressing Ctrl-C in the terminal, won't stop the application.
You can use the "killall" command to stop the program when you face that condition in a program.
In example: if you are running kdenlive and it stops responding or you wish (as you say) to close the application using a command in the terminal, just drop a line like:
You can do this with any other application, but if you are running more than one instance of the program which is going to be killed, all the instances of the program are going to be closed.
If you -in example- drop the: killall nautilus in order to close the file browser, you are also closing the main browser that is used for the Desktop management.
Opens any file directly from the command line in its default application.
Kills all processes involving