Partner node setup tweaks (#5715)

automerge

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

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+
+HERE="$(dirname "$0")"
+
+# shellcheck source=net/datacenter-node-install/utils.sh
+source "$HERE"/utils.sh
+
+ensure_env || exit 1
+
+# Allow more files to be opened by a user
+sed -i 's/^\(# End of file\)/* soft nofile 65535\n\n\1/' /etc/security/limits.conf
+