Tag: Troubleshooting

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Increase Open File Limit Tomcat CentOS 7

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How to increase the open file limit for the tomcat service on Systemd based systems such as Red Hat 7 and CentOS 7.  

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Apache / Nginx Requests Per Hour

This simple bash one liner will show you how to find the number of requests Apache or Nginx has served per hour on a specified date.  This information will allow you to quickly determine a spike in traffic or possible attack on a server.

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MySQL Pager

MySQL LogoEver worked on a MySQL having table locking problems and when you run 'show full processlist' your screen is blasted with hundreds of lines of queries?  MySQL have a feature to help you parse this information easier with a feature known as a 'pager'

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Zombie Processes

In this article, we are going to take an depth look at what Zombie Processes are in Linux and how to troubleshoot them.  We will take a look at how to identify them and what to do when you see them.

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