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Last active February 23, 2022 02:13
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Auto renewal for Let's Encrypt Apache
# Let's Encrypt renewal script for Apache on Ubuntu/Debian
# @author Erika Heidi<>
# Usage: ./ [base-domain-name]
# More info:
if [ ! -f $config_file ] ; then
echo "[ERROR] The config file for the certificate $certdomain was not found."
exit 1;
domains=$(grep --only-matching --perl-regex "(?<=domains \= ).*" "${config_file}")
last_char=$(echo "${domains}" | awk '{print substr($0,length,1)}')
if [ "${last_char}" = "," ]; then
domains=$(echo "${domains}" |awk '{print substr($0, 1, length-1)}')
echo $domains;
if [ -z "$domain" ] ; then
echo "[ERROR] you must provide the domain name for the certificate renewal."
exit 1;
if [ ! -f $cert_file ]; then
echo "[ERROR] certificate file not found for domain $domain."
exit 1;
exp=$(date -d "`openssl x509 -in $cert_file -text -noout|grep "Not After"|cut -c 25-`" +%s)
datenow=$(date -d "now" +%s)
days_exp=$(echo \( $exp - $datenow \) / 86400 |bc)
echo "Checking expiration date for $domain..."
if [ "$days_exp" -gt "$exp_limit" ] ; then
echo "The certificate is up to date, no need for renewal ($days_exp days left)."
exit 0;
echo "The certificate for $domain is about to expire soon. Starting renewal request..."
domain_list=$( get_domain_list $domain )
"$le_path"/letsencrypt-auto certonly --apache --renew-by-default --domains "${domain_list}"
echo "Restarting Apache..."
/usr/sbin/service apache2 reload
echo "Renewal process finished for domain $domain"
exit 0;
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nikos commented Jan 10, 2016

Thanks for your script and your blog article.
To avoid any hickups of the webserver you could also go for a graceful restart, like replacing line 58 with:

apachectl -k graceful

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a bit cleaned up script and removed need for some tools

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Added timestamp at the top, to make logging more clear:

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Ubuntu 15.10 requires bc (sudo apt-get install bc)

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@erikaheidi Thanks for your script and blog article.
Here's a combined version of @bmanojlovic and @benyanke:

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macdonjo commented Jun 21, 2016

I got [ERROR]: certificate file not found for domain but the actual error was to simply run it as sudo

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When my cert is about to expire, I got this error:

The certificate for is about to expire soon. Starting renewal request...
Requested domain  is not a FQDN

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@juanito003, i have the same problem... no solution ?

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@juanito003, and same here... any luck on fixing that?

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geraintp commented Aug 8, 2016

So this doesn't work anymore, by the looks of it the config_file from line 15's format has changed, and no longer contains the domain names, so the net result of the get_domain_list function is an empty string ' ' on top of that the --domains option doesn't work any more either, so line 56 that actually does the hard work wouldn't work even if it didn't have a blank where the list of domains should be..

don't really know enough about bash scripting to fix it without spending a lot of time on it, but if you take the code in line 56

"$le_path"/letsencrypt-auto certonly --apache --renew-by-default --domains "${domain_list}"

and convert it, and run the command

/etc/letsencrypt/letsencrypt-auto certonly --apache --renew-by-default -d -d

assuming /etc/letsencrypt is where you installed letsencrypt it should execute correctly, then service apache2 reload to start using the new cert.

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I used this script for a while and found it wasn't working either. This article really helped me:

It covers starting out through settings up auto-renew, but it definitely covered all the bases for me.

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sjaanus commented May 5, 2017

How does this compare to certbot for renewal? Is this script created before certbot was around? Which is the best practice today?

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