Disable the public key check for rpm installation

Solution 1:

From yum -h:

--nogpgcheck          disable gpg signature checking

Solution 2:

If you want to disable the GPG validation for the whole Repo, add the following line to the Repo definition in /etc/yum.conf:

gpgcheck=0

If you are installing local RPMs using yum, do as Ignacio says.

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Solution 3:

For legacy RPM Linux without yum use:

rpm -i --nosignature