Which command will delete all the blank lines in file old.txt?
A)sed '/d' old.txt
B)sed '/^/d' old.txt
C)sed '/^$/d' old.txt
D)sed '/^*/d' old.txt

Question

Quizplus · Accepted Answer

C) sed '/^$/d' old.txt is the correct command to delete all the blank lines in a file. The pattern /^$/ matches lines that begin and end with no characters between, which are blank lines, and the d command deletes them.

Which Command Will Delete All the Blank Lines in File