Unix/Linux

4.Write the sed command to replacethe string ‘naughty’ with ‘nice’, but only on lines that containyour first name in the file ./check_twice.txt.

5.The cut command can be used toextract columns of information from a text file. The options-c and -f cannot be used in thesame cut command. Write thecommand(s) to extract the fifth character ofthe third word of every line from the file./final.txt.

6.

The file /usr/share/dict/words contains a list of "dictionary"words. Each word is on its own line. Write thecommand(s) to count the number of words from this file that beginand end with a vowel (aeiou) [upper or lower case] and are longerthan four characters in length.

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