Delete the last line in a text file using sed

sed -i '$d' hobba

-i: to change the file itself, not copy contents to another file or something
$d: delete the last line
hobba: the file name

How to delete certain lines of text from a file in Bash using sed

"sed -i 1,+2d file_name"

deletes starting from line '1' and the next '2' lines, i.e. deletes the first 3 lines

Extract Lines From a Text File

"sed -n 2,4p file_name"

extracts lines from 2 to 4 from that file