On Tue, 23 Jul 2019 16:21:13 -0400, Lew Pitcher
 declaimed the following:

>The smbpasswd(8) command maintains the Samba SMB password file that Samba
>uses to validate incoming SMB logins against. The current documentation of
>smbpasswd(8) and it's password file (smbpasswd(5)) indicate that the Samba
>username...
>  "must be a name that already exists in the standard UNIX passwd file"
>  (see https://www.samba.org/samba/docs/current/man-html/smbpasswd.5.html
>   and https://www.samba.org/samba/docs/current/man-html/smbpasswd.8.html)
>
>And, the username that already exists in the standard UNIX passwd file is
>restricted by the rules of useradd(8), where...
>  "Usernames must start with a lower case letter or an underscore,
>   followed by lower case letters, digits, underscores, or dashes. They
>   can end with a dollar sign. In regular expression terms:
>       [a-z_][a-z0-9_-]*[$]?"
>and, thus, do not contain spaces.
>
>So, to access (by username and password) an SMB share, shared by a Linux
>user through Samba, the Windows user cannot have a space in their username.
>

 If that's true -- it also means the username can't have Caps...

 Debian, however, appears to accept almost anything -- can not start
with "-", nor contain a ":" or whitespace, and "/" could cause problems for
the default home directory. https://www.unix.com/man-page/linux/8/useradd/
-- and since Raspbian is a Debian branch...

 I can understand the - and : restrictions -- the former looks too much
like an option in command-line tools, and the latter is the field separator
in the passwd file. / is acceptable if the user was created with a
non-default home directory specification.





--
 Wulfraed                 Dennis Lee Bieber         AF6VN
 wlfraed@ix.netcom.com    http://wlfraed.microdiversity.freeddns.org/

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