Install the certbot client (Let's Encrypt) acme.sh on Debian

This howto is tested on:

• Debian 8.0 Jessie

This howto is tested with theses versions of acme.sh:

• 2.3.2

Parameters

Provide your email adress, used to automaticaly register a Let's Encrypt account:

email="firstname.lastname@domain.com"

Installation

Detect the command proxy (command or sudo):

cmdProxy='command'
command type -f 'sudo' &>'/dev/null' && cmdProxy='sudo

Environment preparation

Install the needed software:

${cmdProxy} apt-get install netcat

Setup

Download and install the software:

command wget -O - 'https://get.acme.sh' | ${cmdProxy} sh

Setup the email address for the Let's Encrypt account:

${cmdProxy} sed -i \
    -e "s/#*ACCOUNT_EMAIL=.*$/ACCOUNT_EMAIL='${email}'/" \
  ~root/.acme.sh/account.conf

Load acme.sh in the current shell:

test -e "${HOME}/.acme.sh/acme.sh.env" && source "${HOME}/.acme.sh/acme.sh.env"

Thanks

• Thanks to Neil for acme.sh (en).
• Thanks to Frédéric Liétart from TheLinuxFr (fr) for Let’s Encrypt et acme.sh sous Debian avec Nginx (fr).