Month: June 2017

Find Your historical DNS record
NetworkingRouters-Modem-FirewallsWeb DevelopmentWordPressWPEngine

How To Find My Old DNS Information Or DNS History

Ever been stuck in a situation where you cannot remember what your last DNS* information was? This may happen while migrating a site from one hosting provider to another, a domain from one registrar to another**, or any of the possible playing around you could find yourself doing with your DNS.

You may easily remember your CNAME records, but trying to find what your SOA, NS, A, AAA, MX, or TXT records*** were in the past can be a tricky exercise unless you are familiar with some really cool tools online like DNSTrails. I just used this tool a few minutes ago and it saved me from a lot of frustration as I wanted to temporarily revert my DNS records to what I just had deleted from my domain registrar.

I am sure there other tools out there, but this one just served me well, so I thought to share the insight with you!

Oh, also, if you ever want to temporarily make your computer point to a specific DNS setting for a specific domain, here are some useful resources:

  1. The Host File Trick on Mac and PC by WPEngine
  2. Editing the Host File on Mac OS X Leopard by WordPress

Finally, just for the sake of completion. Another site I really like is MX Toolbox, this online tool will help you check the propagation status of your DNS, MX, and other Records.

 

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*DNS means Domain Name System

** Yep! That is actually possible! Just ask your current registrar how to migrate your domain
*** CNAME stands for canonical name and serves to make a domain an alias of another domain, MX stands for mail exchange and lists the mail servers that are to be used for a domain, NS stands for name server and tells which Name Server is authoritative for a given domain, SOA stands for State Of Authority and keeps up with when the domain was last updated and other similar information, A stands for address and is the IP of a given domain, AAAA is an IPv6 address records corresponding to a 128-bit IPv6 address while other addresses are mapped for 32-bit IPv4 addresses, TXT is a way for the domain administrator to enter any text into the DNS record. More on this at PCNames.

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Apple TroubleshootingBackupLittle Tips

Macbook Won’t Boot Past Gray Screen With Apple Logo

You probably just want to jump straight to the solution. So, here it is:

  1. Unplug all peripheral devices from your computer.
  2. While holding Option + Command + R + P, Power Up the computer, listen for 1st chime, then 2nd chime, then immediately release all the keys you were holding and watch the computer come to life.*
  3. Proceed to backing up your data onto an external hard drive or other solution you have at hand for backup and remember to backup on a regular basis.
  4. You are good to go!

Now, What Does Command + Option + R + P Do?

Glad you asked! I did not know either. But I looked  That key combination helps reset the NVRAM, sometimes called PRAM, on your Mac. The PRAM is a type of Non-Volatile RAM on your computer that stores some important parameters about your computer’s peripheral devices. This is why you are to unplug all peripheral devices as a first step of this troubleshooting.

According to Apple, “If you experience issues with sleep, wake, power, charging your Mac notebook battery, or other power-related symptoms, you might need to reset the SMC (System Management Controller),” which involves a different set of keys.

Lessons Learned From This Case of Mac Troubleshooting

Lesson Numero Uno: Always backup your computers! It is an investment worth it considering that most external hard drives cost way less than the price of a brand new computer. So, get on the Internet and look up best ways to backup your type of computer and go ahead and do it. You can also just ask your trusted and proven tech-savvy rafiki (translate “friend”) how it is done.

Finally, I want to mention that, as you would quickly notice by glancing on the keyboard nearest to you, the key combination that brings your Mac back to life requires some dexterity you could get from some practice with a keyboard or piano. So, lesson learned, find a piano class and start the lessons as soon as you can.

References:

320px-Apple-Wireless-Keyboard-German from Wikipedia
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* The only time this would not work is if the problem is totally unrelated to the solution I am offering. Haha! Smart! I figured that one out by myself!