Commands
In this tutorial, we will install Nano and review basic commands for navigating the text editor. Table of Contents Introduction For the newbie Linux user,
In this step-by-step guide, we will show you how to install mariaDB on CentOS7. MariaDB is a fork of MySQL relational database management systems (RDBMS).
CentOS 7 Installation: Ensure that you have a clean installation of CentOS 7 on your system. You can download the CentOS 7 ISO from the official CentOS website and follow the installation instructions to set up your system.
Root Access: You’ll need root or sudo privileges to install packages and make system-level changes. If you’re not already logged in as root, make sure you have sudo privileges to execute commands.
Internet Connectivity: Ensure that your CentOS 7 system has access to the internet, as you’ll need to download packages from the repositories during the installation process.
Important: CentOS 7 will reach its end-of-life in June 2024. Plan to transition to a supported version before this date.
$ sudo yum update -y
$ sudo firewall-cmd --zone=public --add-port=3306/tcp --permanent
$ sudo firewall-cmd --reload
If you do not have a clean install and MySQL is currently installed and MariaDB is intended to replace it, stop and disable the MySQL service to prevent potential conflicts.
$ sudo firewall-cmd --zone=public --add-port=3306/tcp --permanent
$ sudo firewall-cmd --reload
If transitioning from an existing MySQL setup or if critical data resides in a MySQL database, safeguard your data by backing it up before initiating the MariaDB installation to mitigate any risks of data loss.
mysqldump -u username -p database_name > backup.sql
Replace username with your MySQL username, database_name with the name of the database you want to back up, and backup.sql with the desired name of your backup file. When you run this command, you’ll be prompted to enter your MySQL password.
If you’re backing up all databases, you can use the --all-databases option:
mysqldump -u username -p --all-databases > all_databases_backup.sql
This command will back up all databases accessible to the specified MySQL user. Remember to securely store your backup files in a safe location, as they contain sensitive data. Additionally, it’s a good practice to automate regular backups to ensure data safety and reliability.
Follow these steps to complete the install.
Run the following command to install mariadb-server on your machine using yum.
$ sudo yum install mariadb-server -y
The mariadb-server is at version 1:5.5.68-1 as of the date of this publication. Install the latest version on your machine.
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
* base: mirror.umd.edu
* epel: epel.mirror.constant.com
* extras: mirrors.advancedhosters.com
* remi-php70: mirror.pit.teraswitch.com
* remi-php73: mirror.pit.teraswitch.com
* remi-safe: mirror.pit.teraswitch.com
* updates: mirror.ette.biz
Resolving Dependencies
--> Running transaction check
---> Package mariadb-server.x86_64 1:5.5.68-1.el7 will be reinstalled
--> Finished Dependency Resolution
Dependencies Resolved
==================================================================================================
Package Arch Version Repository Size
==================================================================================================
Installing:
mariadb-server x86_64 1:5.5.68-1.el7 base 11 M
...
Complete!
Start MariaDB server and run a status check to verify it’s running.
$ sudo systemctl start mariadb.service; sudo systemctl status mariadb.service
● mariadb.service - MariaDB database server
Loaded: loaded (/usr/lib/systemd/system/mariadb.service; enabled; vendor preset: disabled)
Active: active (running) since Wed 2021-11-17 02:20:58 EST; 45min ago
Main PID: 1241 (mysqld_safe)
CGroup: /system.slice/mariadb.service
├─1241 /bin/sh /usr/bin/mysqld_safe --basedir=/usr
└─1474 /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin
--log-error=/var/log/mariadb/mariadb.log --pid-file=/var/run/mariadb/mariadb.pid --socket=/var/lib/mysql/mysql.s...
Run the mysql_secure_installation procedure to complete the database setup. Click here for details on how to proceed.
$ sudo mysql_secure_installation
Uninstalling mariaDB is as simple as installing it using the yum command (below):
$ sudo yum remove mariadb-server
We’ve delved into the historical roots of MariaDB and its connection to MySQL, as well as walked through the installation, configuration, and uninstallation processes. Now, let’s dive into the rich array of commands available in MariaDB that enable you to explore and acquaint yourself with its functionality. Here’s a curated selection of the most frequently used commands to get you started.
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