Known is a free and open source publishing platform. It is a platform to share different types of posts like photos, notes, stories, songs etc. It is written in PHP and can be used with any type of database. It is responsive, secure and easy to use platform.
In this tutorial, we will install Known CMS on CentOS 7 server.
Known does not require any special hardware requirements. It can be installed on servers with a very small amount of RAM. All the required dependencies will be installed throughout the tutorial. You will need a minimal installation of CentOS 7 with root access on it. If you are logged in as a non-root user, you can run sudo -i to switch to the root user.
Before installing any package it is recommended that you update the packages and repository using the following command.
yum -y update
Once you have your system updated, you can proceed to install the LAMP stack. Start the LAMP installation by installing Apache web server and MariaDB, which is a fork of MySQL using the following command.
yum -y install httpd mariadb-server mariadb
Known can be installed on any version of PHP greater than 5.6. You can install PHP 7 for high performance. PHP 7 is not included in default YUM repository, hence you will need to add the Webtatic repository in your system. Webtatic repository requires EPEL repository to work. Run the following command to install EPEL repository.
yum -y install epel-releaseyum -y update
Now install Webtatic repository using the following commands.
Once you have PHP installed, you can check the version of PHP using the following command.
php -v You should get output similar to this.
[root@liptan-pc ~]# php -v
PHP 7.1.3 (cli) (built: Mar 19 2017 15:31:52) ( NTS )
Copyright (c) 1997-2017 The PHP Group
Zend Engine v3.1.0, Copyright (c) 1998-2017 Zend Technologies
You will also need to enable Mod_rewrite in Apache web server by editing /etc/httpd/conf/httpd.conf using your favorite text editor.
Find the following line.
Change it to AllowOverride All.
Now start Apache web server and enable it to start at boot time using the following command.
systemctl start httpdsystemctl enable httpd
To start MariaDB and enable it to start at boot time using the following commands.
systemctl start mariadbsystemctl enable mariadb
Now run the following commands to secure your MySQL or MariaDB installation.
It will run a small script which asks you to set a root password for your MariaDB installation. Most of the questions are self-explanatory and you should answer yes to all the questions.
As we have all the dependencies ready we can now create a database to store the data of Known. Known can also use an SQLite database to store its data. Using SQLite is not recommended when you have the option to use MySQL database as SQLite database is stored in the file system as a file, hence it affects the speed of the application. It is recommended to use MySQL/MariaDB to store Known data. To create a database we will need to login to MySQL command line first. Run the following command for same.
mysql -u root -p
This will prompt you for the password, provide the root password of MySQL which you have set earlier. Now run the following query to create a new database for your Known installation.
CREATE DATABASE known_data;
The above query will create a database named known_data. Once the database is created you can create a new user and grant all the permissions to the user for the database. Using root user is not recommended for the databases. To create a new database user, run the following query.
CREATE USER 'known_user'@'localhost' IDENTIFIED BY 'StrongPassword';
The above query will create a user with username known_user. Replace StrongPassword with a strong password. Now provide the appropriate privileges to your database user over the database you have created. Run the following command.
GRANT ALL PRIVILEGES ON known_data.* TO 'known_user'@'localhost';
Now run the following command to immediately apply the changes on the database privileges.
Exit from MySQL prompt using exit command.
As we have all the dependencies ready, we can now download the install package from the Known site.
cd /var/www/htmlwget http://assets.withknown.com/releases/known-0.9.2.zip -O known.zip
The above command will download the installer archive and store it as known.zip file. You can always look for the latest release by going to the Known download page.
Extract the archive using the following command.
If you don't have unzip installed, you can run yum -y install unzip.
Now create a virtual host for the Known application. Run the following command for same.
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