tailf --version (return code: 0)
tailf from util-linux 2.27.1
tailf --help (return code: 0)
Usage:
tailf [option] <file>
Follow the growth of a log file.
Options:
-n, --lines <number> output the last <number> lines
-<number> same as '-n <number>'
-h, --help display this help and exit
-V, --version output version information and exit
For more details see tailf(1).
Warning: use of 'tailf' is deprecated, use 'tail -f' instead.