dirname [,OPTION/] ,NAME/...
Output each NAME with its last non-slash component and trailing slashes removed; if NAME contains no /'s, output '.' (meaning the current directory).
Written by David MacKenzie and Jim Meyering.
GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report dirname translation bugs to <http://translationproject.org/team/>
Copyright © 2016 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/dirname> or available locally via: info '(coreutils) dirname invocation'