Linux Search Pattern Question: Download Search Pattern PDF

Which one is used to select only one copy of the repeated lines?
a) uniq -u
b) uniq -d
c) uniq -c
d) uniq -I

a) uniq -u

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who \| cut -d " " -f1. What is the ouput if the who command displays like this user1 tty 0 1234? a) user1 b) user1 tty 0 1234 c) tty d) tty 0 1234	Indicate the right option to search for BOB, Bob, BOb or BoB? a) grep -i Bob files b) grep 'B[oO][bB]' files c) grep '[BOB]' files d) grep -v 'Bob' files