In this article, We are going to perform How to Install Memcached on Ubuntu 18.04/16.04 LTS
Table of Contents
Introduction
Memcached is free and open source distributed memory object caching system which is stored in memory key-value pair. It is commonly used to reduce database load and speed up dynamic web applications.
Prerequisites
- Ubuntu 18.04/16.04 LTS
- SSH Access with sudo privileges
- Open Ports 11211
update the system packages
$ sudo apt-get update
Step 1: How to Install Memcached on Ubuntu
Install memcached and libmemcached-tools using below command.
$ sudo apt-get install memcached libmemcached-tools -y
once installation done, check the if Memcached service is running using below command,
$ sudo systemctl status memcached.service
Output
● memcached.service - memcached daemon
Loaded: loaded (/lib/systemd/system/memcached.service; enabled; vendor preset: enabled)
Active: active (running) since Tue 2020-04-14 14:05:29 UTC; 6min ago
Main PID: 10919 (memcached)
Tasks: 6
Memory: 876.0K
CPU: 16ms CGroup: /system.slice/memcached.service
└─10919 /usr/bin/memcached -m 64 -p 11211 -u memcache -l 11.4.0.13
Enable Memcached service at system startup
$ sudo systemctl enable memcached.service
Output
Synchronizing state of memcached.service with SysV init with /lib/systemd/systemd-sysv-install... Executing /lib/systemd/systemd-sysv-install enable memcached
So we have covered how to install Memcached on ubuntu, Below are commands to start, restart and stop Memcached service.
$ sudo systemctl start memcached.service
$ sudo systemctl restart memcached.service
$ sudo systemctl stop memcached.service
Step 2: Configure Memcached on Ubuntu
Next is to configure Memcached, By default Memcached listen on localhost, If you want to change open Memcached config file /etc/memcached.config
$ sudo vi /etc/memcached.config
change your server private or public IP as shown below
# memcached default config file # 2003 - Jay Bonci <[email protected]> # This configuration file is read by the start-memcached script provided as # part of the Debian GNU/Linux distribution. # Run memcached as a daemon. This command is implied, and is not needed for the # daemon to run. See the README.Debian that comes with this package for more # information. -d # Log memcached's output to /var/log/memcached logfile /var/log/memcached.log # Be verbose # -v # Be even more verbose (print client commands as well) # -vv # Start with a cap of 64 megs of memory. It's reasonable, and the daemon default # Note that the daemon will grow to this size, but does not start out holding this much # memory -m 64 # Default connection port is 11211 -p 11211 # Run the daemon as root. The start-memcached will default to running as root if no # -u command is present in this config file -u memcache # Specify which IP address to listen on. The default is to listen on all IP addresses # This parameter is one of the only security measures that memcached has, so make sure # it's listening on a firewalled interface. -l 192.168.10.15 # Limit the number of simultaneous incoming connections. The daemon default is 1024 # -c 1024 # Lock down all paged memory. Consult with the README and homepage before you do this # -k # Return error when memory is exhausted (rather than removing items) # -M # Maximize core file limit # -r
Restart the Memcached Service to take effect
$ sudo systemctl restart memcached.service
Step 3: Install Memcached PHP Module
If you have not installed php on your ubuntu system, follow below commands to install latest php.
Skip this step if you have already installed
$ sudo add-apt-repository ppa:ondrej/php
$ sudo apt-get update
$ sudo apt-get install -y php php-dev php-pear libapache2-mod-php
Use below command to install PHP Memcached on your system
$ sudo apt-get install php-memcached -y
Reload or Restart the Apache service to take effect
$ sudo systemctl reload apache2
OR
$ sudo systemctl restart apache2
Lest test and verify if Memcached is installed and memcached php extension is enabled, create a info.php file in /var/www/html directory
$ sudo nano /var/www/html/info.php
paste the below lines into it and save the file.
<?php phpinfo(); ?>
open your favorite browser and type below your server name or IP followed by info.php.
http://localhost/info.php
Step 4: Add Firewall Rule
Allow port 11211/tcp in Firewall to Access Memcached from remotely
$ sudo ufw allow 11211
Verify if port is enables
$ sudo ufw status
If you have installed Memcached on Cloud Instance Allow the Port in Incoming or Network Security Group
Conclusion:
In this article, We have performed ,How to Install Memcached on Ubuntu 18.04/16.04 LTS System.
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Reference