Question

I saw the sed examples, but no matter how I write that it won’t delete my first line. Actually, I did more tests and it won’t delete my first line either, so for sure I’m doing something wrong:

sed '1d' filename

or for last line

sed '$d' file name

I want the changes to take place in the same file, and don’t want another output file.
So please, what’s the correct way to remove the last line in my file?

Answer 1

sed -i '$ d' filename. The -i flag edits file in place.