Invoke the Linux Terminal in Linux

How to invoke the Linux Terminal in LINUX ?

Whether you are in an x-windows session or working at the console command line, an equivalent in Linux would be to select a new virtual terminal using the key sequence CTRL-ALT-F-Key. For example, from the console, CRTL-ALT-F1 will open virtual tty1, if it has not been disabled by configuration. Once in the screen for the virtual terminal is displayed you can log in with appropriate permissions to use 'ps' to determine the process that you need to kill as you would normally do as indicated in your question. To return to the console use CTRL-ALT-F7.For completeness, if you are at the command line you could begin a program by running it in the background, so you can do other things during it's execution. If a program that is running, but which is not in the background, is stuck your first step should be to try CTRL-Z, to terminate it. If that fails try a virtual terminal.As has been suggested, you could also access the system remotely if you have other systems on the network that could be used. Doing so, requires appropriate services, such as 'sshd', be running in advance of the problem. Similarly, you should experiment with the virtual terminal feature in advance of a problem to assure that it has not been disabled and so you can see how it works.