tsort - perform topological sort
Write totally ordered list consistent with the partial ordering in FILE. With no FILE, or when FILE is -, read standard input.
--help display this help and exit
--version output version information and exit
GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
Report tsort translation bugs to <http://translationproject.org/team/>
Copyright © 2014 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
Full documentation at: <http://www.gnu.org/software/coreutils/tsort>
or available locally via: info (aq(coreutils) tsort invocation(aq