/usr/lib/fai/create_resolv_conf is in fai-nfsroot 5.3.6ubuntu1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | #! /bin/sh
### BEGIN SUBROUTINE INFO
# Provides-Var: $DNSSRVS $DOMAIN
# Requires-Var: none
# Short-Description: <task desc.>
### END SUBROUTINE INFO
# use resolv.conf from dracut's initrd
if [ -f /run/initramfs/state/etc/resolv.conf ]; then
cp /run/initramfs/state/etc/resolv.conf /etc/resolv.conf
elif [ "$DNSSRVS" ]; then
# create a resolv.conf using the DHCP information
[ "$DOMAIN" ] && echo "domain $DOMAIN" >/etc/resolv.conf
for dnshost in $DNSSRVS ; do
echo "nameserver $dnshost" >>/etc/resolv.conf
done
else
# use the resolv.conf from the installserver
[ -f /etc/resolv.conf-installserver ] && cp -p /etc/resolv.conf-installserver /etc/resolv.conf
fi
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