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QUIZ GAME: Linux

            Written: Maryna Pylnyk, 18/03/2017     

Did you know, that "rm -rf" (variously, rm -rf /, rm -rf *, and others) is frequently used in jokes and anecdotes about Unix disasters. The rm -rf variant of the command, if run by a superuser on the root directory, would cause the contents of nearly every writable mounted filesystem on the computer to be deleted, up to the point the system itself crashes from missing some crucial file, directory, or the like. However_ Sun Microsystems introduced "rm -rf /" protection in Solaris 10, first released in 2005. Upon executing the command, the system now reports that the removal of / is not allowed. Shortly after, the same functionality was introduced into FreeBSD version of rm utility. GNU rm refuses to execute rm -rf / if the --preserve-root option is given, which has been the default since version 6.4 of GNU Core Utilities was released in 2006.
https://en.wikipedia.org/wiki/Rm_(Unix)

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We want to cancel the directory . Which one of these command is correct?





Which one of these command can be used in the monitoring of processes?





Is there the difference between these comands
and ?




Which one of these virtual devices doesn't exist:







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