How to Install Memcached on Debian 11

Install Memcached on Debian 11

In this article, we will have explained the necessary steps to install Memcached on Debian 11. Before continuing with this tutorial, make sure you are logged in as a user with sudo privileges. All the commands in this tutorial should be run as a non-root user.

Memcached is an open-source and distributed memory object caching system that holds the most frequently queried data in memory. It is often used to speed up dynamic database-driven websites by caching data and objects in RAM to reduce the number of times an external data source must be read. It is also simple, easy to deploy, and can be integrated with several programming languages including PHP, Python, and more.


  • Operating System with Debian 11
  • Server IPv4 Address with Superuser Privileges (Root Access)
  • Gnome Terminal for Linux Desktop
  • PuTTy SSH client for Windows or macOS
  • Powershell for Windows 10/11
  • Familiar with APT Commands

Install Memcached on Debian 11

Step 1. The first command will update the package lists to ensure you get the latest version and dependencies.

sudo apt update
sudo apt upgrade

Step 2. Install Memcached on the Debian Bullseye system.

The Memcached package is available on Debian’s base repository and can be installed using the APT package manager. Install Memcached directly using the following command:

sudo apt install memcached libmemcached-tools

Once the Memcached is installed, start the Memcached service and enable it to start at system reboot:

sudo systemctl start memcached
sudo systemctl enable memcached
sudo systemctl status memcached

By default, Memcached listens on port 11211 and you can verify as below:

sudo netstat -pnltu


Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0*               LISTEN      2390/memcached
tcp        0      0    *               LISTEN      443/sshd: /usr/sbin
tcp6       0      0 :::22                   :::*                    LISTEN      443/sshd: /usr/sbin

Step 3. Configure Memcached.

Now that the Memcached is installed, its configuration file can be found at /etc/memcached.conf:

nano /etc/memcached.conf

Change some default options as per your requirements:

-U 0
-p 11211
-u memcache
-m 2000

Restart the Memcached service for the changes to take effect:

sudo systemctl restart memcached

Step 4. Enable Memcached for PHP and Python Applications.

Run the commands below to install the PHP Memcached PHP extension:

sudo apt install php-memcached

To use Memcached with Python, install the extension below:

pip install pymemcache
pip install python-memcached

That’s all you need to do to install the Memcached on Debian (Bullseye). I hope you find this quick tip helpful. For further reading Memcached distributed memory object caching system on Debian’s system, please refer to their official knowledge base. If you have questions or suggestions, feel free to leave a comment below.