Update d.configuration.md

[uztbt]

It seems that the username file shouldn't have a newline at the end.

[dgkanatsios]

thanks! Are you sure there is a "\n" added with echo admin?

[uztbt]

Yes, I'm sure.
I have verified with the following commands:

$ echo admin | od -t c
0000000    a   d   m   i   n  \n                                        
0000006

and

$ echo -n admin | od -t c
0000000    a   d   m   i   n                                            
0000005

References

• https://www.gnu.org/software/coreutils/manual/html_node/echo-invocation.html
• https://www.freebsd.org/cgi/man.cgi?query=echo

[dgkanatsios]

thanks!