tldr/pages/common/tac.md

tac

Print and concatenate files in reverse (last line first).

• Print the contents of file1 reversed to the standard output:

tac {{file1}}

• Print the contents of the standard input reversed to the standard output:

{{command}} | tac

• Concatenate several files reversed into the target file:

tac {{file1}} {{file2}} > {{target_file}}