Bash working code to delete first or last line from file

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

Answer 1

Here you go ! delete first line (also BSD/MacOS compatible)

sed '1,1d' file1  >> file1.out

delete last row/line

sed '$d' file2  >> file2.out