diff --git a/bootstrap.sh b/bootstrap.sh
index 2b017d8..25a701f 100755
--- a/bootstrap.sh
+++ b/bootstrap.sh
@@ -175,6 +175,12 @@ sleep 1
 mountpoint /mnt/kdrive
 ls /mnt/kdrive
 
+# backup of things not in kdrive
+
+cp systemd/server-backup.* /etc/systemd/system/
+systemctl daemon-reload
+systemctll enable --now server-backup.timer
+
 ###############################################################################
 # hledger-web
 ##############################################################################
diff --git a/systemd/server-backup.service b/systemd/server-backup.service
new file mode 100644
index 0000000..013b03c
--- /dev/null
+++ b/systemd/server-backup.service
@@ -0,0 +1,7 @@
+[Unit]
+Description=Nightly rsync backup of /opt/server to /mnt/kdrive
+After=local-fs.target
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/rsync -a --delete /opt/server/ /mnt/kdrive/serverBackup/
diff --git a/systemd/server-backup.timer b/systemd/server-backup.timer
new file mode 100644
index 0000000..efcfe3b
--- /dev/null
+++ b/systemd/server-backup.timer
@@ -0,0 +1,9 @@
+[Unit]
+Description=Run nightly server rsync backup
+
+[Timer]
+OnCalendar=*-*-* 02:00:00
+Persistent=true
+
+[Install]
+WantedBy=timers.target