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Server Configuration for EspoCRM

EspoCRM can be installed on:

  • Webserver
  • PHP 8.1 - 8.3
  • Database
    • MySQL 5.7, 8.0 - 8.4
    • MariaDB 10.2.2 and greater
    • PostgreSQL 15 (beta)

In this article:

Recommendations & requirements

PHP requirements

EspoCRM requires PHP with the following extensions:

  • pdo_mysql – for database access;
  • gd – to manipulate images;
  • openssl – to ensure the highest protection;
  • zip – to be able to upgrade EspoCRM and install extensions;
  • mbstring;
  • iconv;
  • curl – for integrations;
  • xml – for excel export;
  • xmlwriter – for excel export;
  • exif – for a proper orientation of uploaded images;
  • bcmath – arbitrary precision mathematics;

php.ini settings:

max_execution_time = 180
max_input_time = 180
memory_limit = 256M
post_max_size = 50M
upload_max_filesize = 50M

Optional php extensions that may be needed:

  • zmq – for websocket;
  • pcntl – for parallel job processing and daemon (Unix-like systems only);
  • posix – for Unix-like systems;
  • ldap – for LDAP authentication.

Database requirements

EspoCRM supports MySQL and MariaDB. These are no special peculiarities. All default settings are fine for EspoCRM.

EspoCRM also experimentally supports PostgreSQL 15. Though it's planned to become official soon.

Required permissions for Unix-based systems


In most cases, permissions are set properly after extracting EspoCRM instance from a zip package. You need only to set ownership.


The files and directories should have the following permissions:

  • data, custom, client/custom – should be writable all files, directories and subdirectories (664 for files, 775 for directories, including all subdirectories and files);
  • application/Espo/Modules, client/modules – should be writable the current directory (775 for the current directory, 644 for files, 755 for directories and subdirectories);
  • bin/command – should be executable (754);
  • all other files and directories should be readable (644 for files, 755 for directories).

To set the permissions, execute these commands in the terminal:

find . -type d -exec chmod 755 {} + && find . -type f -exec chmod 644 {} +;
find data custom client/custom -type d -exec chmod 775 {} + && find data custom client/custom -type f -exec chmod 664 {} +;
chmod 775 application/Espo/Modules client/modules;
chmod 754 bin/command;


All files should be owned and group-owned by the webserver process. It can be www-data, daemon, apache, www, etc.


On Bitnami Stack, files should be owned and group-owned by daemon user.

On shared hosts, files should be owned and group-owned by your user account.

To set the owner and group-owner, execute these commands in the terminal:

chown -R <OWNER>:<GROUP-OWNER> .;

Setting up crontab

More information about jobs in EspoCRM is available here.

Unix-like systems

To setup crontab on Unix-like system, take the following steps:

1. Login as administrator into your EspoCRM instance.

2. Go to the Scheduled Jobs section in the administrator panel (Menu > Administration > Scheduled Jobs) and copy the string for the crontab. It looks like this one:

* * * * * /usr/bin/php -f /var/www/html/espocrm/cron.php > /dev/null 2>&1

You might need to replace /var/www/html/espocrm/ with an actual path to your instance.

3. Open a terminal and run this command:

crontab -e -u WEBSERVER_USER

WEBSERVER_USER can be one of the following “www”, “www-data”, “apache”, etc (depends on your webserver).

4. Paste the copied string (from step 2) and save the crontab file (Ctrl + O, then Ctrl + X for nano editor).


See in a separate article how to set up Cron on Windows.

Configuration instructions for specific web servers

See also