Linux
What command is used to assign executable permission to the owner of the file named "letter"?

chmod g + x letter
chmod u + x letter
chmod ugo + x letter
chmod u + w letter
None of these

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Linux
NIS

allows configuration-such as password and group files
is a simple directory service whose main purpose is to allow remote authentication of systems on local network systems
is Network Information Service
was formerly known as yellow pages

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