Executing programs

There are two options how programs in a computer can be executed.

First method is to run programs interactively. There are different ways how it is done, depending on either GUI (Graphical User Interface) is used or CLI (Command Line Interface) is used.

When GUI is used, then applications are executed via double clicking their icons. If CLI is used, then these files are executed by specifying their file names.

It maybe necessary to specify full path name if that file is not located in a current working directory or path environment variable, that indicates which locations need to be searched for files.

Second method is to perform non-interactive execution of a program. Non-interactive execution means that a program is executed on scheduled basis, it is executed as a service in Windows, or daemon in Linux systems, or as a part of OS starting sequence.

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