Recently, I have been adding varnish to some of my websites to improve their performance. But in the end, how do I know if varnish is helping or not, or if it is helping, can varnish help more? Obviously you…
In a recent article here on UptimeMadeEasy about setting up NTP, I mentioned and showed an example on using tcpdump to watch the ntp traffic in and out of your server. I realized that the very short example was just…
In the old days, when you wanted to build a Linux DNS server, you would immediately go to Bind. More recently, however, other Open Source options have developed that store their records in SQL databases. Additionally, WebGUIs have been created…
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If you are using Cacti to monitor and graph all of your SNMP devices in your network then you will probably want to add your VMware ESXi hosts into your Cacti configuration. I have yet to find a good Cacti…
If you are like most system administrators, you will want to monitor everything you can. Enabling SNMP on each of your devices helps you in this task. If you have VMware ESXi servers, you will want to enable SNMP on…
A few articles ago, I wrote about using the “apachebench” or “ab” utility to benchmark your website (see: apachebench). Ab is a great tool, but since then, I have found and fallen in love with a new tool for benchmarking…
SSH Tunneling – Get Through Your Firewall to Other Ports Do you have a server on the other side of a firewall that you can ssh to, but to which you cannot reach on other ports. Let’s imagine, for example,…
I mentioned in another article (Speed Up Your Webpage with Varnish) some of the benefits of Varnish Cache. It provides excellent caching and proxying which can provide a nice performance boost for your website. Another benefit in varnish cache is…
Let me begin by saying that most people running the vCenter appliance are typically using Essentials versions of VMware. This example case is using VMware Essentials Plus. In smaller VMware installations, it is simpler to install a new version of…