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README: Improve cluster formation docs

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- Begin code block with sudo to remind the following shall be ran as root.
- Remove hardcoded key, instead copy from ubutnu user.
This commit is contained in:
rasmus 2023-01-03 16:09:17 +00:00
parent 34369d211b
commit d2a719af43
1 changed files with 4 additions and 4 deletions
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README.md
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@ -161,6 +161,8 @@ Added some ARM64 workers by using Ubuntu 22.04 server on Raspberry Pi.
After machines have booted up and you can reach them via SSH:
```bash
sudo -i
# Enable required kernel modules
cat > /etc/modules << EOF
overlay
@ -200,10 +202,8 @@ systemctl disable --now multipathd snapd bluetooth ModemManager hciuart wpa_supp
# Permit root login
sed -i -e 's/PermitRootLogin no/PermitRootLogin without-password/' /etc/ssh/sshd_config
systemctl reload ssh
cat << EOF > /root/.ssh/authorized_keys
sk-ecdsa-sha2-nistp256@openssh.com AAAAInNrLWVjZHNhLXNoYTItbmlzdHAyNTZAb3BlbnNzaC5jb20AAAAIbmlzdHAyNTYAAABBBD4/e9SWYWYoNZMkkF+NirhbmHuUgjoCap42kAq0pLIXFwIqgVTCre03VPoChIwBClc8RspLKqr5W3j0fG8QwnQAAAAEc3NoOg== lauri@lauri-x13
EOF
userdel -f ubuntu
cat ~ubuntu/.ssh/authorized_keys > /root/.ssh/authorized_keys
userdel -fr ubuntu
apt-get install -yqq linux-image-generic
apt-get remove -yq cloud-init linux-image-*-kvm
```