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Tutorial10: Sed & Awk Utilities

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# Issue the following Linux pipeline command: who | sed -n '/^[a-m]/ p' | tee sed-8.txt | more What did you notice?

# Issue the following Linux pipeline command: ls | sed -n '/txt$/ p' | tee sed-9.txt What did you notice?

# Issue the following to run a checking script: ~uli101/~~week11~~week10-check-1 If you encounter errors, make corrections and '''re-run''' the checking script until you receive a congratulations message, then you can proceed.

:In the next investigation, you will learn how to manipulate text using the '''awk''' utility.

# Issue the following linux pipeline command to display the '''year''' and '''quantity''' of cars that '''begin''' with the '''letter 'f'''' for the '''cars2.txt''' database: awk '$1 ~ /^f/ {print $2,$4}' cars2.txt | tee awk-8.txt What did you notice? The problem is that the '''cars2.txt''' database separates each field by a semi-colon (''';''') instead of '''TAB'''. Therefore, it does not recognize the second and fourth fields. You need to issue awk with the -F option to indicate that this file's fields are separated (delimited) by a semi-colorn.

# Issue the following linux pipeline command to display the '''year''' and '''quantity''' of cars that '''begin''' with the '''letter 'f'''' for the '''cars2.txt''' database: awk -F";" '$1 ~ /^f/ {print $2,$4}' cars2.txt | tee awk-9.txt What did you notice this time?

# Issue the following to run a checking script: ~uli101/~~week11~~week10-check-2 If you encounter errors, make corrections and '''re-run''' the checking script until you receive a congratulations message, then you can proceed.

= LINUX PRACTICE QUESTIONS =

Msaul

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Tutorial10: Sed & Awk Utilities

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