Add update-vm script

subjects/update-vm/sync.sh

@@ -0,0 +1,46 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+IFS='
+'
+
+if ! test -d "$HOME/VirtualBox VMs"; then
+    echo "Is VirtualBox installed ? Could not find $HOME/VirtualBox VMs"
+    exit 1
+fi
+
+echo "If you have created snapshots for the debian-01 virtual machine, they will be deleted"
+echo "Same thing for display recordings"
+echo "You can safely ignore this warning if you don't know what it means"
+echo
+echo "Press the [RETURN] key to continue"
+read -r
+
+if pgrep VirtualBox >/dev/null; then
+    echo Close VirtualBox before updating debian-01 Virtual Machine
+    exit 1
+fi
+
+key_file=$(mktemp)
+
+cat <<'EOF'> "$key_file"
+-----BEGIN OPENSSH PRIVATE KEY-----
+b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW
+QyNTUxOQAAACAeqfcTKSukPU9D1pmO2v7EeaTefBMlr84RAKfjR3xlwgAAAJDSLNAv0izQ
+LwAAAAtzc2gtZWQyNTUxOQAAACAeqfcTKSukPU9D1pmO2v7EeaTefBMlr84RAKfjR3xlwg
+AAAEB8CYX9ExfuZx3Uw7otY3CIa2G+5K71Zu3iPn/97LXInB6p9xMpK6Q9T0PWmY7a/sR5
+pN58EyWvzhEAp+NHfGXCAAAADWFzc2V0c0BzZXJ2ZXI=
+-----END OPENSSH PRIVATE KEY-----
+EOF
+
+rsync \
+    --archive \
+    --delete \
+    --compress \
+    --compress-choice lz4 \
+    --info=progress2 \
+    --rsh="ssh -oIdentitiesOnly=yes -p521 -i$key_file" \
+    "$HOME/VirtualBox VMs/debian-01" assets@assets.01-edu.org:
+    # assets@assets.01-edu.org:debian-01 "$HOME/VirtualBox VMs"
+
+echo "debian-01 successfully updated"