$ curl -sfL https://get.k3s.io | sudo sh -s - server --cluster-init --write-kubeconfig-mode "0644"
[INFO]  Finding release for channel stable
[INFO]  Using v1.33.5+k3s1 as release
[INFO]  Downloading hash https://github.com/k3s-io/k3s/releases/download/v1.33.5+k3s1/sha256sum-amd64.txt
[INFO]  Downloading binary https://github.com/k3s-io/k3s/releases/download/v1.33.5+k3s1/k3s
[INFO]  Verifying binary download
[INFO]  Installing k3s to /usr/local/bin/k3s
[INFO]  Skipping installation of SELinux RPM
[INFO]  Creating /usr/local/bin/kubectl symlink to k3s
[INFO]  Creating /usr/local/bin/crictl symlink to k3s
[INFO]  Creating /usr/local/bin/ctr symlink to k3s
[INFO]  Creating killall script /usr/local/bin/k3s-killall.sh
[INFO]  Creating uninstall script /usr/local/bin/k3s-uninstall.sh
[INFO]  env: Creating environment file /etc/systemd/system/k3s.service.env
[INFO]  systemd: Creating service file /etc/systemd/system/k3s.service
[INFO]  systemd: Enabling k3s unit
Created symlink /etc/systemd/system/multi-user.target.wants/k3s.service → /etc/systemd/system/k3s.service.
[INFO]  systemd: Starting k3s

$ export KUBECONFIG=/etc/rancher/k3s/k3s.yaml

$ kubectl config get-contexts
CURRENT   NAME      CLUSTER   AUTHINFO   NAMESPACE
*         default   default   default

$ kubectl get no
NAME    STATUS   ROLES                       AGE    VERSION
nuc10   Ready    control-plane,etcd,master   131m   v1.33.5+k3s1

https://docs.k3s.io/upgrades/automated