Question

3

What exactly is non-interactive program?

rated 0 times [ 3] [ 0] / answers: 1 / hits: 986 / 1 Year ago, tue, july 5, 2022, 4:26:01

man page for wget says

NAME

   Wget - The non-interactive network downloader.



DESCRIPTION

   Wget is non-interactive, meaning that it can work in the background,

   while the user is not logged on.  This allows you to start a retrieval

   and disconnect from the system, letting Wget finish the work.  By

   contrast, most of the Web browsers require constant user's presence,

   which can be a great hindrance when transferring a lot of data.

wget is an example of non-interactive program I know. Now my question is,

How can wget be used without user logged on?

How does non-interactive programs work?

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erettor

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answered 1 Year ago eballxeye · Accepted Answer

How can wget be used without user logged on?

By including the wget command in a daemon/service or a program where you as a user do no initiate the download.

How does non-interactive programs work?

When you create a deamon and have this daemon active it can continue to probe a server and ask for a download. If the servers is dead the non-interactive program will continue when the server is back up without any need for the user to act.

Updating Ubuntu, for instance, can be done without any action from a user and even without logging in.