tac

Display and concatenate files with lines in reversed order. See also: cat. More information: https://www.gnu.org/software/coreutils/manual/html_node/tac-invocation.html.

• Concatenate specific files in reversed order:

tac path/to/file1 path/to/file2 …

• Display stdin in reversed order:

cat path/to/file | tac

• Use a specific separator:

tac --separator , path/to/file1 path/to/file2 …

• Use a specific regex as a separator:

tac --regex --separator [,;] path/to/file1 path/to/file2 …

• Use a separator before each file:

tac --before path/to/file1 path/to/file2 …