Disable gpgcheck while running updates

Problem Statement:

# su -c 'yum install *.rpm'

which produced a long list of packages and depchecks, apparently successfully, but then gave:

Install 50 Package(s)

Total size: 436 M
Installed size: 436 M
Is this ok [y/N]: y
Downloading Packages:

Package libobasis3.3-en-US-base-3.3.0-6.x86_64.rpm is not signed
[dave at davehost RPMS]$

Resolution:

yum --nogpg install ...