Memcached is an open-source, free and high-performance in-memory caching system. Generally, it’s used to speed up web applications by caching large volumes of data in memory from page load requests or API calls. This article explains how to install and configure Memcached on Debian 10.
Install Memcached on Debian
The standard Debian repositories includes the Memcached package. Perform the following steps to install and configure Memcached on Debian 10.
Step 1 – Installing Memcached
Run the following command as root or user with sudo privileges:
First update the package index list by typing:
sudo apt update
Now install the Memcached and required dependencies by following command:
sudo apt install memcached libmemcached-tools
Step 2 – Verify Installation
Once the installation complete, the Memcached service will be start automatically. You can check the status for the service by typing:
sudo systemctl status memcached
It should show output something like this:
● memcached.service - memcached daemon Loaded: loaded (/lib/systemd/system/memcached.service; enabled; vendor preset: enabled) Active: active (running) since Sat 2020-08-22 11:01:01 UTC; 27s ago Docs: man:memcached(1)
Step 3 – Configure Memcached
By default, Memcached is set to listen only on
localhost. Edit the
/etc/memcached.conf file to configure the Memcached options. Generally, the default configuration settings are sufficient for most users.
Step 4 – Remote Access
It is always recommended, do not allow remote access. It’s always risk of a distributed denial-of-service (
DDoS) attack if the Memcached is configured improper. To allow remote access to the Memcached server, you need to configure the firewall and open the Memcached UDP port
11211 only from trusted clients.
For example, if you want to connect to the Memcached server over a private network, and the Memcached server IP is
192.168.93.125, and the client’s IP address is
At first, you should edit the
/etc/memcached.conf file and set the service to listen on the server’s private networking interface:
sudo nano /etc/memcached.conf
Find the line which starts with
-l 127.0.0.1 and replace
127.0.0.1 with the server IP address
Restart the Memcached service for the changes to take effect:
sudo systemctl restart memcached
Now, open the Memcached port in the firewall:
sudo ufw allow from 192.168.123.32 to any port 11211
We hope you learned successfully how to install Memcached on Debian 10. Visit Memcached Wiki to know more about Memcached.
If you have any questions or feedback, please leave a comment below.