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
User=unbound
Group=unbound
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
# https://github.com/NLnetLabs/unbound/issues/509
ExecStartPre=/bin/bash -c 'if [ ! "$DISABLE_UNBOUND_ANCHOR" == "yes" ]; then /usr/sbin/unbound-anchor -a /var/lib/unbound/root.key -c /etc/unbound/icannbundle.pem -R; else echo "Updates of root keys with unbound-anchor is disabled"; fi'
ExecStartPre=/usr/sbin/unbound-checkconf
ExecStart=!/usr/sbin/unbound -d $UNBOUND_OPTIONS

[Install]
WantedBy=multi-user.target