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How to install mysql server 5.7 on Ubuntu 16.04 LTS ( Xenial Xerus )

MySQL is a popular database management system used for my web applications. How do I install MySQL server version 5.7 on Ubuntu Linux 16.04 LTS ( Xenial Xerus )?
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Sysadmin because even developers need heroes!!!

CentOS / RHEL 7 Restart / Stop / Start Networking Command

I recently installed CentOS Linux version 7 or Red Hat Enterprise Linux version 7. How can I restart networking service using command line options? How can I start / stop and restart networking service on a CentOS/RHEL 7 based system?
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Fedora Linux: Restart / Stop / Start DHCPD Server Command

I am a new Fedora Linux version 18 system administrator. How do I restart dhcpd server using command line options in Fedora Linux server running on HP server hardware?
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Ubuntu Linux: Start / Restart / Stop Nginx Web Server

How do I restart / stop / start the nginx web server under a Ubuntu Linux operating systems using command line option?
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Ubuntu Linux: Start / Restart / Stop Apache Web Server

How do I start, restart, or stop Apache 2.x web server on Ubuntu Linux operating systems using command line options?
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Ubuntu Restart Networking Command

How do I restart the networking on Ubuntu Linux system from a shell prompt?
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Linux Start Restart and Stop The Cron or Crond Service

How do I start, restart and stop the cron service under a Linux / BSD / UNIX-like operating systems using command prompt?
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