Sed & amp; Awk case 3 per day

Sed & Awk daily case 3 1. Delete only 2nd rows $ sed '2 d' employee.txt 2. Delete 1st ~ 4 rows $ sed '1, 4 d' employee.txt 3. Delete 2nd ~ The last line $ sed '2, $ d' employee.txt 4. deletes a row $ sed '1 ~ from the first line ~ 2 d 'employee.txt 5. Delete the row $ sed containing the manager '/Manager/d' employee.txt 6. Delete the row from the first row containing Jason to the first row $ sed'/Jason /, 4 d 'employee.txt 7. Delete the row containing the source code from the source code to the last code $ sed '/AJ /, $ d 'employee.txt 8. Delete the line between the source and the target /, /Jane/d 'employee.txt 9. Delete the row containing Jason and the second row $ sed '/Jason /, + 2 d 'employee.txt 10. Delete empty rows sed '/^ $/d 'employee.txt 11. Delete # Start comment row sed'/^ #/d' employee.txt