password restrictions are different in the GUI and on the command line.

[Ralf Mardorf]

On Sun, 2016-07-17 at 20:21 +0200, Ralf Mardorf wrote:
> On Sun, 17 Jul 2016 18:34:18 +0100, Colin Law wrote:
> > 
> > > 
> > > On Sun, Jul 17, 2016 at 07:01:41PM +0200, s.achterop at rug.nl
> > > wrote:  
> > > > 
> > > > I don't have a /etc/X11/xorg.conf or /etc/X11/xorg.conf.d
> > > > So how is keyboard.conf going to be called?
> 
> You could edit it using an editor, that's how I did it. _But_ I use
> this keyboard xorg.conf for my Arch install, not for my Ubuntu 16.04
> install. It not necessarily is required for lightdm, just in some
> circumstances it might be required.
> 
> > 
> > @OP do you have the time and inclination to experiment further and
> > try
> > to determine exactly what is causing the problem?  I have difficulty
> > believing it is the length of pwd.  I currently have a six character
> > pwd on one of my machines consisting of letters and numbers and it
> > works fine.
> 
> I agree with Colin. Consider to add a user named   dummy   with the
> password   dummy   , this should work, even while the password is just
> 5 chars short, available by each dictionary and equal to the user
> name.
> This is really a weak password and it wouldn't become much stronger,
> if
> it would be   crashtestdummy1234   . Long not necessarily is stronger
> regarding software that tries to crack passwords.
> 
> Most of the times I use weak passwords, because most data anyway would
> be available by mounting my unencrypted partitions from a live media.
> Strong passwords are good, if required, not in general for a home
> computer. I don't have a lockable refrigerator, this could be more
> dangerous than easy access to my unimportant computer data.

PS:

dummy   already is a tricky password for a German keyboard layout, since
the "y" on the German keyboard is a "z" :).

However, my local for Linux installs always is en and the keyboard
always de, but I don't experience an issue with my 16.04 install.

Just in case I wrote a keyboard.conf for my Ubuntu install ...

[rocketmouse at archlinux ~]$ cat /mnt/moonstudio/etc/X11/xorg.conf.d/keyboard.conf 
#Section "InputClass"
#       Identifier "keyboard"
#       MatchIsKeyboard "yes"
#       Option "XkbLayout" "de"
#       #Option "XkbVariant" "nodeadkeys"
#EndSection

... with all lines commented out ;).