Can you modify how Cygwin prepends domain name to username?

Thu Sep 8 23:39:00 GMT 2016

Hi Linda,

The plus character is the default separator for mkpasswd.

In the help for it (mkpasswd -h), you will see

   -S,--separator char     For -L use character char as domain\user
                           separator in username instead of the default '+'.



On 9 September 2016 at 05:44, Linda Walsh <> wrote:
> Carl wrote:
> ADUNSW+root:*:2149521262:2147484161:U-ADUNSW\root,
> S-1-5-21-1140405718-358989843-3445714273-2037614:/home/root:/bin/bash
> ---
> Where does the '+' come from?  Is that in Win10 or some newer domain
> control software?
> I'm running Windows 7, and cygwin uses the same naming conventions
> as the OS.  I.e. in Windows, outside of cygwin, my domain logins look like
> "Domain\user".  So in my /etc/passwd file, I see the same thing:
> Domain\user.
> I would be nervous to change the form in /etc/passwd to something
> different from the OS's name for the account, but it might make
> no difference.
> How does your local Win OS name such accounts?  I.e. if I use
> Process Hacker, it can show the user account for each process, as obtained
> from Windows.  It always shows Domain/user for the non-local users running
> programs.
> --
> Problem reports:
> FAQ:         
> Documentation:
> Unsubscribe info:

Problem reports:
Unsubscribe info:

More information about the Cygwin mailing list