The following exercise from part A to part D should be completed using Unix comm

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The following exercise from part A to part D should be completed using Unix commands such as (grep, sed, and regular expressions)

Part A: Devise a sequence to display a count of lines containing strings containing <BR /> in all .html files in the current directory. <BR /> is case-insensitive. It can be upper or lower case.

Part B: Using sed, write a command to add the tags <HTML> to the beginning of a file and </HTML> to the end of a file.

Part C: How would you list all of the ordinary files in your directory that are not user-executable?

Part D: Devise a sequence to display the extensions of all files in the current directory along with a count of each extension.

Explanation / Answer

Part A: Devise a sequence to display a count of lines containing strings containing <BR /> in all .html files in the current directory. <BR /> is case-insensitive. It can be upper or lower case.

grep -i '<br./>' ./*.html | wc -l

Part B: Using sed, write a command to add the tags <HTML> to the beginning of a file and </HTML> to the end of a file.

sed -i '1s/^/<html> /' file_name

sed -i '$s/$/ </html>/' file_name

Part C: How would you list all of the ordinary files in your directory that are not user-executable?

ls -l | grep -e "^...-" | grep -e "^-"

Part D:.Devise a sequence to display the extensions of all files in the current directory along with a count of each extension.

ls |sed 's/.///' | sed 's/.*.//' |sort| uniq --count

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The following exercise from part A to part D should be completed using Unix comm

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