Step 1: Download install script and run it.
wget -O /tmp/install.sh https://github.com/MisakaMikoto-35c5/ssh-keys-auto-updater/raw/main/install.sh
bash /tmp/install.sh
Step 2: Change public keys update url
echo https://www.example.com/your_ssh_public.keys > ~/.ssh/ssh_keys_update_url
chmod 600 ~/.ssh/ssh_keys_update_url
Step 3: Run script
~/.ssh/update-keys.sh
cat ~/.ssh/authorized_keys
Step 4: Add following line script to crontab
1 */12 * * * /bin/bash ~/.ssh/update-keys.sh
Recommend: Install md5sum
sudo apt install md5sum