This unit is provided by:
Options
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    [Service]- 
        EnvironmentFile=-/etc/sysconfig/unbound
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        ExecStart=/bin/bash -c 'if [ "$DISABLE_UNBOUND_ANCHOR" = "yes" ]; then echo "Updates of root keys with unbound-anchor is disabled"; else /usr/sbin/unbound-anchor $UNBOUND_ANCHOR_OPTIONS; fi'
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        ExecStart=/usr/sbin/unbound-anchor -a /var/lib/unbound/root.key -c /etc/unbound/icannbundle.pem
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        SuccessExitStatus=1
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        Type=oneshot
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        User=unbound
 
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    [Unit]- 
        Description=update of the root trust anchor for DNSSEC validation in unbound
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        Documentation=man:unbound-anchor(8)
 
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Additionnal notes
Nothing here.