yum localinstall --nogpgcheck http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-$(rpm -E %fedora).noarch.rpm http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-$(rpm -E %fedora).noarch.rpm

yum install yum-plugin-fastestmirror

yum groupinstall arabic-support

 # yum groupupdate "GNOME Desktop" \

    "Development Tools" "Sound and Video" \
    "Games and Entertainment" "Administration Tools" \
    "Office/Productivity" "System Tools"

 # rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-23-$(uname -i)

# dnf upgrade
# dnf clean all
# dnf --releasever=23 --setopt=deltarpm=false distro-sync --nogpgcheck

 # rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-22-$(uname -i)

# yum update yum
# yum clean all
# yum --releasever=22 distro-sync

 # rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-21-$(uname -i)

# yum update yum
# yum clean all
# yum --releasever=21 distro-sync

 # yum install keepassx

# yum update yum