Display and concatenate files with lines in reversed order. See also:
cat
. More information: https://www.gnu.org/software/coreutils/tac.
tac path/to/file1 path/to/file2 ...
stdin
in reversed order:cat path/to/file | tac
tac --separator , path/to/file1 path/to/file2 ...
tac --regex --separator [,;] path/to/file1 path/to/file2 ...
tac --before path/to/file1 path/to/file2 ...