Now When Type in CLI
unbound-anchor -a /etc/unbound/root.key
Log to me
[1581430016] libunbound[17599:0] error: failed to load trust anchor from /etc/unbound/root.key at line 5, skipping
How Can Download Latest Trusted Key For Unbound
As far as I can tell from the CentOS7 packages, the Unbound package unbound-1.6.6-1.el7.x86_64.rpm is installed with unbound-libs-1.6.6-1.el7.x86_64.rpm. This includes (and is pre-configured) with /var/lib/unbound/root.key, which contains both the old DNS root key (key ID 19036 from 2010) and the current DNS root key (key ID 20326 from 2017). The Unbound package is already pre-configured to run as a validating resolver, see /etc/unbound/unbound.conf and auto-trust-anchor-file: "/var/lib/unbound/root.key”.
So with CentOS7 you are already done with Unbound as a validating resolver!
My OS is Centos 7 X64 and unbound version is
notice: Start of unbound 1.6.6.
Unbound 1.6.6 is 2.5 years old and many bugs have been patched and features have been added. You may consider installing a more recent version, e.g. unbound-1.9.0-2.gf.el7.x86_64.rpm.