Most commands show the help with any of these two options:
vi -h
vi --help
But some others only allow --help
shred --help
xrandr --help
In these second commands, -h
shows something like
xrandr: unrecognized option '-h' Try 'xrandr --help' for more information.
What's the point in showing this message instead of showing the help? The -h
option is not being used for anything else anyway.