Lately, I was working on securing one of the website’s through Let’s Encrypt and during I encountered the following error while running “./letsencrypt-auto”
Checking for new version... Creating virtual environment... ./letsencrypt-auto: line 455: virtualenv: command not found
It was on CentOS 6.7 hosted with DigitalOcean and this is how I fixed.
Ensure you have root privilege and execute the following command.
yum install centos-release-SCL yum update yum install scl-utils python27 python27-scldevel scl enable python27 bash
Afterwards, I was able to proceed with Let’s Encrypt setup.