Question 1

How do I delete a sed matching line?

Accepted Answer

To begin with, if you want to delete a line containing the keyword, you would run sed as shown below. Similarly, you could run the sed command with option -n and negated p , (! p) command. To delete lines containing multiple keywords, for example to delete lines with the keyword green or lines with keyword violet.

Question 2

How do I remove a specific pattern from a Unix file?

Accepted Answer

N command reads the next line in the pattern space. d deletes the entire pattern space which contains the current and the next line. Using the substitution command s, we delete from the newline character till the end, which effective deletes the next line after the line containing the pattern Unix.

Question 3

Does sed work with regex?

Accepted Answer

Although the simple searching and sorting can be performed using sed command, using regex with sed enables advanced level matching in text files. The regex works on the directions of characters used; these characters guide the sed command to perform the directed tasks.

delete lines with sed match a special regex

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regex

sed

match

Thomas

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