Add datacenter node setup scripts (#5517)

automerge

net/datacenter-node-install/setup-ssh.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+HERE="$(dirname "$0")"
+
+# shellcheck source=net/datacenter-node-install/utils.sh
+source "$HERE"/utils.sh
+
+ensure_env || exit 1
+
+set -xe
+# Setup sshd
+sed -i 's/^PasswordAuthentication yes//' /etc/ssh/sshd_config
+sed -i 's/^#\(PasswordAuthentication\) yes/\1 no/' /etc/ssh/sshd_config
+sed -i 's/^#\(PermitRootLogin\) .*/\1 no/' /etc/ssh/sshd_config
+systemctl restart sshd