MIT-Curricular/OS/bash/Week2/answers.md

OS Lab - Week2

Q2. - grep -E '^..$' * (finds all the files in the folder with exactly two characters) - grep '^[A-Z]' * - grep '\.$' * - grep ' ' * - grep '[0-9]' filename > outputfile

Q3. - grep -c "ICT" ITStudents.txt - sed 's/:IT:/:Information Technology:/g' students.txt > ITStudents.txt - sed awk -F: '$1 == "1234" { avg = ($6 + $7 + $8) / 3; print avg }' students.txt - awk 'NR==1 { print toupper($0) } NR>1 { print }' students.txt

Q4. - grep -rl "MIT" . | xargs sed -i 's/MIT/Manipal Institute of Technology/g'

Q5. - find . -type f -name '*[0-9]*' -exec wc {} +

Q6. - for i in {1..5}; do wc example.txt & done - pkill wc