#CENTOS MYSQL RESTART HOW TO#

0 – Runlevel 0 indicates system shutdown.Every Linux and Unix like system has four common runlevels as listed below: For a service to auto-start, it must be added to a runlevel. In Linux distributions, there are mode operations that implement system initialization called runlevels. While setting alerts and continuously monitoring your Linux distribution is crucial, some Linux services can self-heal if well configured, thanks to the init systems that manage services. And that is exactly what we will be learning in this hands-on tutorial. If you are a system admin or a curious app developer, you want to ensure that such services run continuously, and in the unfortunate event of a system crash, they start automatically after the system reboots. are accessible, such services must run continuously. To ensure that our web applications, databases, mail servers, etc. nginx – A service that comes with Nginx web server.httpd/apache2 – A service that comes with Apache2 web server.cupsd – It is the daemon controlling printing.sshd – It is the daemon allowing remote connections.Some may have come with the user applications that you install. Such services may have shipped with the operating system software. It’s common for operating systems, and especially Linux and Unix systems to have processes and services running in the background. Systemd – used in the most recent distributions such as:.Upstart – used in former distributions such as:.System V – an older init system found in older distributions like:.Some distributions may come with two or more init systems as outlined below: In Linux distributions, there are three major initialization (init) systems, depending on the distribution you are running.

#CENTOS MYSQL RESTART HOW TO#

You can check out our tutorials on how to install MySQL, Nginx, and Apache.

However, the same principles apply to other processes that make up a complete server such as Nginx, Apache, Redis, or other applications. We will use the MySQL database service for practical examples. The second part will cover theoretical information about what we achieved in part one. In this first installment of the two-part tutorial, we will show you how to configure services to automatically start after a system crash or server reboot with practical examples. Figuring out and restarting every service your application needs to run after a system crash or reboot can be tedious.

Oftentimes unexpected system crashes prompt system admins to initiate reboots and restart of individual services. In computing, things don’t always go as planned.

Centos mysql restart