I want to make a DVD with some useful packages (for example php-common). The only problem is that if I try to install on a computer that's not connected to internet, I can't validate the public key.

The scenario is like this:

  1. I download the RPMs, I copy them to DVD.
  2. I install CentOS 5.5 on my laptop (it has no internet connection).
  3. I try install one using yum (or rpm -i, or whatever).

I get the following error: public key for "package" is not installed.

How can I bypass that?

3 Answers 3


From yum -h:

--nogpgcheck          disable gpg signature checking
  • 2
    What if the network-less system is older (i.e. CentOS 5) and its yum does not have a nogpgcheck option?
    – Urhixidur
    Nov 24, 2015 at 21:45
  • 1
    change yum.conf to switch gpgcheck to 0 Sep 5, 2017 at 20:31

For legacy RPM Linux without yum use:

rpm -i --nosignature


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


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

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