Linux Search Pattern Question: Download Search Pattern PDF

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

b) grep 'B[oO][bB]' files

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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	How can you search for blank line in a file? a) $ grep " " file b) $ grep "^$" file c) $ grep [" "] file d) $ grep [^$] file