Let's encrypt installation procedure (Oracle Linux, RHEL, Centos7)

Let's encrypt seems to be the standard if you want to easily SSL, but it was written that the procedure is different in each place than I thought I would try, so I made a note of the procedure I tried. The environment at hand is Oracle Linux 7.8.

Reference URL

This is the official website of let's encrypt. https://letsencrypt.org/ja/getting-started/

It seems better to set it using a tool called certbot. https://certbot.eff.org/lets-encrypt/centosrhel7-apache

If you select the software used for the web server and the OS, it will tell you how to set it.

Install Certbot

It says to install Certbot using a package management tool called snap, but it didn't work so I usually install it with yum.

# yum install certbot python-certbot-apache

Configuration

Set. It seems that it can be set only with this.

# sudo certbot --apache

Check by actually hitting the URL.

It is SSL-enabled.

Certificate renewal

If this is left as it is, the deadline is set to 3 months, so you need to renew it manually.

Test if the certificate is renewed with this command. It seems that you can test by adding --dry-run.

# sudo certbot renew --dry-run

When actually updating

# sudo certbot renew

Is used. It is more convenient to update automatically, so set it automatically with cron.

I hope you find it helpful.