File unbound.service of Package unbound

[Unit]
Description=Unbound recursive Domain Name Server
After=syslog.target network.target
After=unbound-keygen.service
Wants=unbound-keygen.service
Wants=unbound-anchor.timer
Before=nss-lookup.target
Wants=nss-lookup.target

[Service]
Type=simple
EnvironmentFile=-/etc/sysconfig/unbound
#ExecStartPre=/sbin/runuser --shell /bin/sh -c "/usr/sbin/unbound-anchor -a /var/lib/unbound/root.key -c /etc/unbound/icannbundle.pem" unbound
ExecStartPre=/usr/bin/sudo -u unbound /usr/sbin/unbound-anchor -a /var/lib/unbound/root.key -c /etc/unbound/icannbundle.pem
ExecStartPre=/usr/sbin/unbound-checkconf
ExecStart=/usr/sbin/unbound -d $UNBOUND_OPTIONS

[Install]
WantedBy=multi-user.target