These are the things you need to change on your system when duplicating the same image to devices, especially when on the same network.
sudo nano /etc/cloud/cloud.cfg
make sure preserve_hostname is set to true:
preserve_hostname: true
check your current hostname
cat /etc/hostname
echo "<my-new-hostname>" | sudo tee /etc/hostname
sudo nano /etc/cloud/cloud.cfg
comment out:
sudo: ["ALL=(ALL) NOPASSWD:ALL"]
sudo nano /etc/sudoers.d/90-cloud-init-users
and remove the
NOPASSWD:ALL
and change it to
<username> ALL=(ALL) ALL
All the turtlebots will have the same ssh host keys, which can get confusing. Regenerate them to ensure they are recognized as different machines over ssh.
sudo rm /etc/ssh/ssh_host*
sudo ssh-keygen -o -t ed25519 -N '' -f /etc/ssh/ssh_host_ed25519_key
sudo ssh-keygen -o -t rsa -b 4096 -N '' -f /etc/ssh/ssh_host_rsa_key
Exit ssh and log back in, following the instructions when it errors out. You will need to paste in something like:
ssh-keygen -f "/home/myuser/.ssh/known_hosts" -R "10.166.219.XXX"
Log on to ssh again.
sudo rm -f /etc/machine-id
sudo dbus-uuidgen --ensure=/etc/machine-id