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  • 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

    Afterward, I was able to proceed with Let’s Encrypt setup.

    Reference: https://community.letsencrypt.org/t/solved-virtualenv-command-not-found/2127/8