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How to Install OpenEMR on CentOS 7

Author: Kenn Carlo Gutierrez

Last Updated: Thu, Sep 16, 2021
Business CentOS MySQL and MariaDB Web Servers


OpenEMR is an open-source electronic health records and medical practice management solution. This article explains how to install OpenEMR on CentOS 7.

1. Install Prerequisites

2. Configure MySQL Database

  1. Log in to MySQL as root.

    # mysql -u root
  2. Create an openemr database.

    mysql> CREATE DATABASE openemr;
  3. Create a new database user. Replace <PASSWORD> with a strong password.

    mysql> CREATE USER 'openemr-user'@'localhost' IDENTIFIED BY '<PASSWORD>';
  4. Grant the user permission to access the database.

    mysql> GRANT ALL PRIVILEGES ON openemr.* TO 'openemr-user'@'localhost';
  5. Reload the grant tables to activate the permission settings.

  6. Exit MySQL.

    mysql> exit

3. Download OpenEMR

  1. Download OpenEMR.

    # wget

    Please see the OpenEMR Download page for the latest OpenEMR version.

  2. Extract the files.

    # tar xvzf openemr*.tar.gz
  3. Move the openemr-6.0.0 directory to /var/www/html/openemr.

    # mv openemr-6.0.0 /var/www/html/openemr
  4. Give apache ownership of the directory.

    # chown -R apache:apache /var/www/html/openemr
  5. Temporarily give all users read and write access during the installation.

    # chmod 666 /var/www/html/openemr/sites/default/sqlconf.php

4. Install OpenEMR

  1. Navigate to, replacing with your server's IP address. The browser displays the OpenEMR Setup page.

  2. Click Proceed to Step 1 to continue with the installation.

    OpenEMR Pre-install Setup Page

  3. Choose I have already created the database and click Proceed to Step 2 to continue.

    Step 1 - Select Database Setup

  4. In the MySQL Server Details section, enter the database Login Name and Password you set in section two.

  5. In the OpenEMR Initial User Details section, create an Initial User Login Name and Initial User Password.

  6. If you want 2 Factor Authentication, click the Enable 2FA option.

  7. Click Create DB and User.

    Step 2 - Database and OpenEMR Initial User Setup Details

  8. Click Proceed to Step 4.

    Step 3 - Creating Database and First User

5. Configure Apache and PHP

  1. Return to your terminal session.

  2. Edit php.ini.

    # nano /etc/php.ini
  3. Locate these variables and change their settings as shown.

    • Remove the leading ; character from max_input_vars and change its value to 3000.

    • Change max_execution_time to 60.

    • Change max_input_time to -1.

    • Change post_max_size to 30M.

    • Change memory_limit to 256M.

    • Remove the leading ; character from mysqli.allow_local_infile.

  4. Save and exit the file.

  5. Reload the Apache web server for these changes to take effect.

    # systemctl reload httpd
  6. Return to your web browser.

  7. Click Proceed to Step 5.

    Step 4 - Configure PHP

  8. Return to your terminal session.

  9. Create a new configuration file named openemr.conf.

    # nano /etc/httpd/conf.d/openemr.conf

    Paste the following into the file.

    <Directory "/var/www/html/openemr">
        AllowOverride FileInfo
        Require all granted
    <Directory "/var/www/html/openemr/sites">
        AllowOverride None
    <Directory "/var/www/html/openemr/sites/*/documents">
        Require all denied
  10. Save and exit the file.

  11. Restart Apache.

    # systemctl restart httpd
  12. Return to your web browser.

  13. Click Proceed to Select a Theme.

    Step 5 - Configure Apache Web Server

  14. Choose Keep Current, then click Proceed to Final Step.

  15. A confirmation page appears. Click Start to log in.

  16. (Optional) Register your installation for security updates and new release announcements.

6. Change Permissions

OpenEMR recommends setting file permissions as follows.

# chmod 644 /var/www/html/openemr/library/sqlconf.php

# chmod 644 /var/www/html/openemr/sites/default/sqlconf.php

# chmod 600 /var/www/html/openemr/acl_upgrade.php

# chmod 600 /var/www/html/openemr/setup.php

# chmod 600 /var/www/html/openemr/sql_upgrade.php

# chmod 600 /var/www/html/openemr/ippf_upgrade.php

See the OpenEMR documentation for more details.

More Information

To learn more about OpenEMR, please see these resources:

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