installation
upgrade
Inquire
Import public key
rpm -K | checksig rpmfile checking the integrity of packages and signature
rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
yum-config-manager --add-repo= http://172.16.0.1/cobbler/ks_mirror/7/
-qpR openssl.x86.rpm RPM
RPM -qi OpenSSL package information
Which files package provides rpm -qf /usr/lib/libssl.so.6 query
yum provides /usr/lib/libssl.so.6
ldd ldd / usr / sbin / sshd dependent libraries