diff --git a/debian-uncloud-image.sh b/debian-uncloud-image.sh
index a3d462b..d696a72 100755
--- a/debian-uncloud-image.sh
+++ b/debian-uncloud-image.sh
@@ -144,5 +144,9 @@ rm -f /var/lib/systemd/random-seed
 # Remove temporary files and reclaim freed disk space.
 run_root apt-get clean
 
+# FIXME: add fnux's SSH key for testing purposes.
+mkdir -p /mnt/root/.ssh
+curl https://key.wf/fnux > /mnt/root/.ssh/authorized_keys
+
 # Make sure everything is written to disk before exiting.
 sync
diff --git a/fedora-uncloud-image.sh b/fedora-uncloud-image.sh
index a60d687..795db33 100755
--- a/fedora-uncloud-image.sh
+++ b/fedora-uncloud-image.sh
@@ -146,5 +146,9 @@ rm -f /var/lib/systemd/random-seed
 # Note: build logs could be removed as well.
 run_root dnf clean all
 
+# FIXME: add fnux's SSH key for testing purposes.
+mkdir -p /mnt/root/.ssh
+curl https://key.wf/fnux > /mnt/root/.ssh/authorized_keys
+
 # Make sure everything is written to disk before exiting.
 sync
diff --git a/ubuntu-unclound-image.sh b/ubuntu-unclound-image.sh
index bfd5bc0..54e933f 100755
--- a/ubuntu-unclound-image.sh
+++ b/ubuntu-unclound-image.sh
@@ -141,5 +141,9 @@ rm -f /var/lib/systemd/random-seed
 # Remove temporary files and reclaim freed disk space.
 run_root apt-get clean
 
+# FIXME: add fnux's SSH key for testing purposes.
+mkdir -p /mnt/root/.ssh
+curl https://key.wf/fnux > /mnt/root/.ssh/authorized_keys
+
 # Make sure everything is written to disk before exiting.
 sync