kernel security, bug fix, and enhancement update：
yum update kernel-tools-libs
$ yum update python-perf
NetworkManager and libnl3 security, bug fix and enhancement update：
yum update libnl3-cli
yum update NetworkManager-libnm
yum update NetworkManager-tui
$ yum update NetworkManager-wifi
glibc security update (Important)：
yum update glibc-common
yum update glibc-headers
wget security update：
$ yum update wget
openssh security and bug fix update (Moderate)：
yum update openssh-clients
$ yum update openssh-server
gnutls security, bug fix, and enhancement update：
$ yum update gnutls
nss-pem security and bug fix update
$yum update nss-pem
