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How to get the checksum for a file on Windows

Note: This blog post is from 2018. Some content may be outdated--though not necessarily. Same with links and subsequent comments from myself or others. Corrections are welcome, in the comments. And I may revise the content as necessary.
If you're running Windows and ever want to know the md5 or sha-1 checksum for a file you have, did you know there's a built-in command to get it? From the Windows command prompt, run this to get the sha-1 checksum:

certutil -hashfile [path\]filename

or to get the md5, just add that as an argument:

certutil -hashfile [path\]filename MD5

The tool is built into Windows 7 and above, and Server 2008 and above (at least). Tools like it are included in other OS's, but I'm sharing the above for Windows users.

Regardless of what OS you use, for more on why knowing the checksum can be useful (and why comparing file sizes instead may not be enough), and especially with regard to some interesting info about installers for CF2016 and CF11, do read on.

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I'll be speaking at 3 upcoming events, first on Tomcat then on CF and FR

Note: This blog post is from 2018. Some content may be outdated--though not necessarily. Same with links and subsequent comments from myself or others. Corrections are welcome, in the comments. And I may revise the content as necessary.
I've been negligent to get a post out about this, and now the events are upon us. I'll be speaking in coming weeks at 3 events, about my favor topics: troubleshooting and monitoring, both CF/Lucee and Tomcat, as well as CF2018 hidden gems. Here are their titles, descriptions, and links to the events:

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Keeping your FusionReactor updated

Note: This blog post is from 2018. Some content may be outdated--though not necessarily. Same with links and subsequent comments from myself or others. Corrections are welcome, in the comments. And I may revise the content as necessary.
If you are using FusionReactor (the monitor for CF/Lucee/Tomcat and other Java servers), are you on the latest release, or at least a relatively recent one? You really should be, as new features are added all the time. (I especially love the new "archived metrics" that had been added in 7.2.) I've written in the past about various FusionReactor updates, and would hope to do so in the future. (Here's my category of posts on FR.)

In this post, I want to encourage you to update as well as show you how to do it, whether you have implemented FR using the automated installer, the manual install process (drop in the jar), or are running it within Commandbox. (I also address a mistake you could make when using the automated installer that would leave you NOT completely updated because you missed a step.) But notice that most of the bullet points are about OTHER than actually DOING the update. If that's your focus, jump to that section.

Update: Just a few months after I offered this post, version 8.1 was released (in Jan 2019), and it offers now a notification in the top banner when there is an update, which is nice (but obviates only a couple of points I make below. The rest should apply well into future FR releases.)

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