How to upgrade the step-ssh utilities on an existing host

If you'd like to update your server hosts Smallstep apps without registering a host, you can do that as follows.

Step 1: SSH to your host as a user with root access. (Keep the hostname handy, you will need it later)
ssh <hostname>

Step 2: Run all steps as the root user.
sudo su

Step 3: Install the latest step-ssh utilities Install on Ubuntu & Debian (DEB package)

Install on CentOS or Amazon Linux 2 (RPM package)

Step 4: Activate the PAM/NSS Modules & HUP SSHD

export hostname="[hostname]"
step-ssh activate "$hostname"