=== Grub ===

 * Grub 2 - Setting default entry
 {{{
Open /etc/default/grub and ensure this line exists:
GRUB_DEFAULT=saved

Apply the change to grub.cfg by running:
# grub2-mkconfig -o /boot/grub2/grub.cfg

Now list all possible menu entries
# grep ^menuentry /boot/grub2/grub.cfg | cut -d "'" -f2

Now set the desired default menu entry
# grub2-set-default <menu entry title>

Verify the default menu entry
# grub2-editenv list
}}}

=== Systemd ===
 * Enable rc-local in OL7
 {{{
cat >> /usr/lib/systemd/system/rc-local.service <<EOF

[Install]
WantedBy=multi-user.target
EOF
chmod +x /etc/rc.d/rc.local
systemctl enable rc-local.service
systemctl start rc-local.service
systemctl status rc-local.service

echo "systemctl restart network.service" >> /etc/rc.d/rc.local
}}}