Strip last component from file name
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).
-z, --zero
end each output line with NUL, not newline
--help
display this help and exit
--version
output version information and exit
dirname /usr/bin/
-> "/usr"
dirname dir1/str dir2/str
-> "dir1" followed by "dir2"
dirname stdio.h
-> "."
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 © 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/dirname>
or available locally via: info '(coreutils) dirname invocation'