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bin/recipes/net/net-up

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+#!/usr/bin/env bash
+
+sudo mkdir -p /etc/systemd/network
+cat <<'EOF' | sudo tee /etc/systemd/network/20-enp0s1.network
+[Match]
+Name=enp0s1
+
+[Network]
+DHCP=yes
+EOF
+
+sudo systemctl enable --now systemd-networkd
+sudo systemctl enable --now systemd-resolved
+
+sudo ln -sf /run/systemd/resolve/resolv.conf /etc/resolv.conf
+
+sudo ip link set enp0s1 up
+sudo networkctl reload
+sudo networkctl reconfigure enp0s1
+

bin/recipes/net/notes.md

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+# bring the link up
+sudo ip link set enp0s1 up
+
+# give yourself an address in QEMU's usernet
+sudo ip addr add 10.0.2.15/24 dev enp0s1
+
+# default gateway for slirp
+sudo ip route add default via 10.0.2.2
+
+# DNS via slirp (or use 1.1.1.1 if you prefer)
+echo "nameserver 10.0.2.3" | sudo tee /etc/resolv.conf > /dev/null
+
+# sanity checks
+ip -4 a show enp0s1
+ping -c2 10.0.2.2
+ping -c2 deb.debian.org