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8.3.2. Support for SSH Certificates

Support for certificate authentication of users and hosts using the new OpenSSH certificate format was introduced in Fedora 13, in the openssh-5.4p1-1.fc13 package. If required, to ensure the latest OpenSSH package is installed, enter the following command as root:
~]# dnf install openssh
Last metadata expiration check performed 0:58:01 ago on Sun Sep  6 16:07:22 2015.
Package openssh-7.1p1-1.fc23.x86_64 is already installed, skipping.