[OPEN-ILS-GENERAL] postgres: FATAL: role "root" does not exist

[Jim Lynch]

It looks like the install of postgres went in without error by running:
root at ubuntu-OptiPlex-755:~/Evergreen-ILS-2.10.5# make -f 
Open-ILS/src/extras/Makefile.install postgres-server-ubuntu-trusty
But when I issued:

root at ubuntu-OptiPlex-755:~/Evergreen-ILS-2.10.5# createuser -s -P evergreen
Enter password for new role:
Enter it again:
createuser: could not connect to database postgres: FATAL:  role "root" 
does not exist

Just in case I did
root at ubuntu-OptiPlex-755:~/Evergreen-ILS-2.10.5# /etc/init.d/postgresql 
start
  * Starting PostgreSQL 9.3 database server

But a second attempt ad creating a user failed in the same manner. I'm 
not a postgres person.  I know mysql well.

Thanks,
Jim.