Jompeich d’er Bisente

A reverse cat!

# cat file
1st line
2nd line
3rd line

# tac file
3rd line
2nd line
1st line

Sometimes you need to process a file starting at the end, case in point a log file and you want to go from the last lines up. I remember programming something like this in C some years ago because I didn’t knew this command existed…