creating new admin webmin user in shell [closed]
just in addition:RedHat distribution (i.e. Fedora, CentOS, Gentoo, etc.):
/usr/libexec/webmin/changepass.pl /etc/webmin admin newpassword
Debian distribution (i.e. Debian, Ubuntu, etc.):
/usr/share/webmin/changepass.pl /etc/webmin admin newpassword
FreeBSD:
/usr/local/lib/webmin/changepass.pl /usr/local/etc/webmin admin newpassword
Remember to replace "admin" and "newpassword" with your own details!