I have a text file with quite a few entries I want to delete out. I figured that using grep would be the best but unfortunately I cannot figure out how to get it to return lines without a search string....
For example if I want every line of a file that contained 2940 I would use
grep "2940" file.txt
But what I want is every line that DOESN'T contain 2940.... I found some information on a (?! ) operator but it doesn't seem to work...
grep "(?!2940)" file.txt
returns nothing.....
Any ideas?
grep (possibly regex) question.
