I need to update acme.sh client on Linux (Ubuntu to be specific). Is it possible? Do you think update will delete or make changes to existing Let’s Encrypt TLS certificates? Tell me how do I update acme.sh client?
Step 1 - See the current version for acme.sh
acme.sh --version
You will see something as follows:
https://github.com/acmesh-official/acme.sh v2.8.8
Step 2 - Updating or upgrading acme.sh Let’s Encrypt client from Linux or Unix
Again run the following command:
acme.sh --upgrade
You will notice information on the screen:
[Wed Nov 25 13:14:21 UTC 2020] Installing from online archive. [Wed Nov 25 13:14:21 UTC 2020] Downloading https://github.com/acmesh-official/acme.sh/archive/master.tar.gz [Wed Nov 25 13:14:21 UTC 2020] Extracting master.tar.gz [Wed Nov 25 13:14:21 UTC 2020] Installing to /root/.acme.sh [Wed Nov 25 13:14:21 UTC 2020] Installed to /root/.acme.sh/acme.sh [Wed Nov 25 13:14:21 UTC 2020] Good, bash is found, so change the shebang to use bash as preferred. [Wed Nov 25 13:14:22 UTC 2020] OK [Wed Nov 25 13:14:22 UTC 2020] Install success! [Wed Nov 25 13:14:22 UTC 2020] Upgrade success!
That is all. The upgrade command won’t delete or remove TLS/SSL certificates. However, always keep verified backups. You have backups, don’t you? 
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