Well, we jumped the gun by about a month on our release of an Incredible PBX refresh for the Raspberry Pi. Little did we know that the Raspberry Pi folks were poised to release a terrific new board with better everything for the same $35 original price. The Raspberry Pi B+ makes an even better platform for your very own VoIP PBX. And it’s still less than a ONE HOUR project!
NEWS FLASH: The all-new Incredible PBX release for Raspberry Pi 2 is now available.
If you missed the news last week, the Model B+ still sports a 700 mHz ARM processor with 512MB of RAM but there now are 4 USB ports instead of two, 40 GPIO pins instead of 26, a new USB/Ethernet controller chip, and an HDMI port. Composite (NTSC/PAL) video now is integrated into a 4-pole 3.5mm ‘headphone’ jack. The SDHC card slot has been replaced by a microSD slot that supports a far broader range of cards including the 64GB SanDisk high performance microSDXC card. Adding WiFi is as simple as plugging in a USB adapter. If your WiFi connection is password-protected, just plug your credentials into the top of /etc/wpa.conf and /root/restart-wlan0. And it’s still the same form factor with better mounting holes, and it draws less power. And, no, it won’t fit in your old Raspberry Pi case. With the new high performance microSDXC cards, slow write speeds are a thing of the past!
Other than the slow write speeds to the sd card (you might add a warning note about that part), I had it swapped over to local extension numbers and trunked to existing asterisk servers in minutes… [I]t doesn’t get any cooler than this! — Scott P.
Trust us when we say the performance of the Model B+ is nothing short of amazing. Can it do everything a $300 dual-core Atom PC can do? No. Can it do 95% of everything for someone whose requirements do not exceed a handful of simultaneous calls at a time but still wants a full-blown PBX for call routing, transcribed voicemails delivered by email, IVRs, music on hold, and text-to-speech and speech-to-text apps for a home, a SOHO office, a Little League team, or a dorm room? Absolutely. As Scott mentioned, configuration changes may take you a few seconds longer than would normally be the case with an Atom-based PC and a hard disk. See the ad in the sidebar for ordering info. You’ll have a fully functional PBX up and running before you can break a summer sweat.
Silver Lining. By supporting the Raspberry Pi Foundation, you’re also doing your part to get kids interested in computer science again. With the demise of the TRS-80 and the Commodore 64 and VIC-20, we all owe Eben Upton and his team our heartfelt thanks for introducing an inexpensive 21st Century computing platform for Everyman (and woman!) and for getting these computers into the hands of over 3 million enthusiasts! So what are you waiting for?
Be a kid again and party like it’s 1977. Ironically, Eben was born the year after the introduction of the TRS-80.
Introducing Incredible PBX 3.11.11 for the Raspberry Pi
To celebrate the latest arrival, we’re pleased to introduce Incredible PBX 3.11.11 for the Raspberry Pi, a turnkey PBX featuring the latest releases of Asterisk® 11 and FreePBX® 2.11 for a near perfect telephony platform. Special thanks to the tens of thousands of pioneers that have given the first dozen iterations of this software a healthy workout over the past 18 months. We couldn’t have done it without you!
What’s New in Incredible PBX 3.11.11? Well, just about everything is either new or upgraded: new firmware, new kernel, new Asterisk 11, updated FreePBX 2.11, and all the turnkey apps for Asterisk that have made Incredible PBX a flexible platform. You still get simple utilities to configure 1GHz overclocking and automatic expansion of the 3.11.11 image to run on any size microSD card. You also get Asterisk’s latest long-term support release, Asterisk 11, which provides an incredibly stable VoIP platform. There also have been some major plumbing enhancements in FreePBX 2.11 to improve its stability and to enhance security. Assuming you already have a Google Voice number, you also still get Google Voice support with free calling in the U.S. and Canada as well as free faxing and SMS messaging plus most of the Incredible PBX feature set. New Google Voice numbers do not include Google Chat unfortunately. We’ve also added optional voice transcription and email delivery of MP3 voicemails to smooth the migration to unified messaging. If you want the first 15 seconds of each voicemail transcribed, then issue the following commands after logging into your server as root. Additional documentation is available here.
mv sendmailmp3 sendmailmp3.notrans
mv /root/sendmailmp3 sendmailmp3
You also get automatic detection and support of 512MB Raspberry Pi devices without touching anything. We’ve also included an awesome fax server that works great. The complete tutorial is available here. update-my-pi in the /root folder of your server helps to safeguard your system by bringing it up to date with the latest fixes and enhancements. After running it the first time, it gets run automatically whenever you log in as root. For the safety of your server, don’t disable it! It’s free for the first ten updates, and then it’s just $20 a year. And it’s on the honor system so you can cheap out if you prefer not to contribute. There’s also a new upgrade-my-pi utility to bring your Raspberry Pi firmware up to date should you ever need to migrate to a newer Raspberry Pi board.
To enable overclocking at your own risk, run: raspi-config. Overclocking works for us. YMMV! The key is a good power supply. If you’re using a microSD card larger than 4GB, version 3.11.11 can resize your partitions on the fly. Just choose the option in raspi-config and reboot. Even though the kernel now monitors CPU temperature and manages overclocking, it’s always nice to see for yourself. To monitor the CPU temperature, just run the status program which provides a current snapshot anytime. Temperature data now is provided on the FreePBX Dashboard as well.
There’s more good news. Networking is much more stable; however, we’ve dropped support for the TP-Link WiFi adapters. If you still have one of these adapters, see this thread on the PIAF Forum for setup instructions. Otherwise you’ll need the recommended AirLink 101 N-150 if you want WiFi capability. In the 3.11.11 release, your server will automatically attempt to connect to any open WiFi network that it can find. We’ve also added two scripts in /root to let you restart either your wired or wireless network and designate it as the primary network: restart-eth0 and restart-wlan0. Time zone management was also a bit of mess with multiple file settings required to support both Linux and PHP. In this release, you’ll be prompted to select your timezone when you first log in as root. The setup script will automatically apply your entry in all the right places. We’ve also replaced SendMail with Exim to simplify the process of using an SMTP mail gateway such as Gmail. The procedure for making the change is documented here.
As part of the latest build, we’ve also eliminated the pi user account. Everything you need to do to configure Incredible PBX requires root permission. So goodbye sudo. Only the root user account is included, and the default password is raspberry. Change the password when you first log in. New SSH and DUNDI keys now are automatically generated when you first boot your server. The FreePBX Backup and Restore Utility is included in this new build. AsteriDex Speed Dialing has been enhanced for our friends across the Atlantic. Enter 3-digit Dial Codes in AsteriDex, and you can call by dialing 000nnn. In this upgrade, Telephone Reminders work like a champ.
X Windows is included in this build as well. This won’t work with SSH. For a demo slideshow, plug in a real monitor and log in as root. In the /root folder, enter the command: startx. To end the slideshow, press ESCape. To disable the slideshow: mv .xinitrc xinitrc. To add photos, copy .jpg images into /root/slideshow. No mouse is required for the slideshow but, if you run X Windows natively, you’ll need a USB mouse. The SMS Blasting app in /root now supports phone numbers (which use SMS) and email addresses (which use SendMail).
Last but not least, a sophisticated Conference Bridge has been added to Incredible PBX. If you route one of your inbound DIDs to the predefined IVR, users can press 0 and enter 1234 for the conference PIN to join the conference. Local extensions simply dial C-O-N-F. We’ve already tested a 9-person conference call with excellent results.
And here’s what the conference call looked like in the FreePBX Dashboard:
Incredible PBX 3.11.11 Quick Start Guide
So you don’t have to jump around between articles, we’ve put together this Quick Start Guide that tells you everything you need to know to get up and running in about an hour. Most of that time will be consumed copying the Incredible Pi image to an SD card. So there’s plenty of time for lunch during the hour. Once your system is running and you’ve completed the setup steps below, then jump over to the application tutorial which explains how to use every one of the 35+ Incredible PBX Apps for the $35 Raspberry Pi.
What to Buy. Here’s everything you need to get started.1 The case is optional. Yes, you can run the Raspberry Pi sitting on your desk with no case. It’s only 5 volts. WiFi is also optional. There’s a 10/100 port on the Raspberry Pi that gives you all the networking you need. Here are the links to buy the pieces. You also need a CAT5 cable and either a spare PC or Mac with Putty or SSH and a pair of earbuds or an HDMI cable to connect to a TV or monitor and a USB keyboard.
- $35 512MB Raspberry Pi B+ from MCM or Newark or Amazon
- $10 Power Adapter (this one is rock solid!)
- $11 SanDisk 16GB microSDHC Type 10 card or $8 more for 32GB
- £12.95 Rainbow Pibow Case (Adafruit cases coming soon!)
- $10 AirLink 101 N150 WiFi Adapter or Adafruit Mini WiFi Adapter
Setting Up Google Voice. If you want free calling in the U.S. and Canada, then you’ll need an existing Google Voice account that includes the Google Chat feature. You’ll need one dedicated to Incredible Pi, or it won’t work. Log out after setting up the new Google Voice account! Also note that Google Voice may cease to function at any time after May 15, 2014. You can read all about it here.
- Log into existing Google Voice account
- Enable Google Chat as Phone Destination
- Configure Google Voice Calls Settings:
- Call Screening – OFF
- Call Presentation – OFF
- Caller ID (In) – Display Caller’s Number
- Caller ID (Out) – Don’t Change Anything
- Do Not Disturb – OFF
- Call Options (Enable Recording) – OFF
- Global Spam Filtering – ON
- Place test call in and out using GMail Call Phone
Baking Your Incredible Pi. The disk drive for the Raspberry Pi B+ is a microSD card. So what you need to do is download Incredible Pi and copy the image onto this card. Mac and Linux installers are included. For Windows, just use Win32 Disk Imager. Here are the steps:
- Download the latest Incredible Pi package
- Decompress the tarball: tar zxvf incrediblepi-version.tar.gz
- Copy .img file to SDHC using image utility or script
- Insert microSD card into Raspberry Pi
- Boot the Raspberry Pi from Incredible Pi microSD card
Your First Bite of Incredible Pi. If you’re not using a monitor and keyboard, you can use SSH to gain root access to Incredible Pi. And you can use any web browser on your private network to access your server. There are a couple of hurdles. First, you need the network address of your new server. And, second you need an SSH client. With Incredible PBX 3.3 and beyond, you needn’t worry about the IP address. You now can access your server via SSH by logging in like this: firstname.lastname@example.org. And browser access to your server is available at the following address: http://incrediblepbx.local. You still can plug in some earbuds when the bootup process begins and listen for the Incredible Pi to tell you its IP address when the boot procedure completes (about 90 seconds). Then you can use that IP address instead of incrediblepbx.local. The latest releases of Incredible PBX also include a Java-based SSH client in the FreePBX web GUI: Admin -> Java SSH. Because of the almost weekly security problems with Java, we strongly recommend using a standalone SSH client such as Putty.
Here’s everything you need to know about security for Incredible Pi:
1. ALWAYS RUN INCREDIBLE PI BEHIND A SECURE HARDWARE-BASED FIREWALL/ROUTER
2. NEVER EXPOSE ANY INCREDIBLE PI PORTS DIRECTLY TO THE INTERNET
3. NEVER MAP INBOUND INTERNET PORTS FROM YOUR FIREWALL TO INCREDIBLE PI
Initial Setup. There also are a few setup steps to complete once your Incredible Pi finishes the bootup process. When you first login (username: root password: raspberry), you’ll be prompted to change your root password and to set your default time zone. If you’re using either a wired network or an open WiFi network, then everything just works. If you’re using secured WiFi, then you’ll need to plug in your credentials in /etc/wpa.conf and reboot. The wired network always takes precedence so unplug the cable if you want WiFi to be your primary network. /root/update-my-pi runs automatically when you log in as root. It will bring your server up to current specs. Finally, now’s the time to repartition your microSD card if you’re using a card larger than 4GB (highly recommended!). While you’re at it, bump up the performance of your Raspberry Pi by 50% by setting the overclocking to turbo mode. It works great for us. YMMV! The key is a rock-solid power adapter such as the one we’ve recommended. Just run raspi-config and follow your nose.
Accessing Incredible Pi By GUI. You don’t have to be a Linux guru to use Incredible Pi. In fact, we’re just about finished with the Linux command prompt, but stay logged in until we finish the steps below. Most of your configuration of the PBX will be performed using the FreePBX® Web GUI.
If you’re new to Asterisk® and FreePBX, here’s the one paragraph primer on what needs to happen before you can make free calls with Google Voice. You’ll obviously need a free Google Voice account. This gets you a phone number for people to call you and a vehicle to place calls to plain old telephones throughout the U.S. and Canada at no cost. You’ll also need a softphone or SIP phone to actually place and receive calls. YATE makes a free softphone for PCs, Macs, and Linux machines so download your favorite and install it on your desktop. Phones connect to extensions in FreePBX to work with Incredible Pi. Extensions talk to trunks (like Google Voice) to make and receive calls. FreePBX uses outbound routes to direct outgoing calls from extensions to trunks, and FreePBX uses inbound routes to route incoming calls from trunks to extensions to make your phones ring. In a nutshell, that’s how a PBX works. There are lots of bells and whistles that you can explore down the road.
Let’s get started. Using a browser, enter the IP address of your server or just use incrediblepbx.local as the address. Choose FreePBX Administration. When prompted for a username and password, use admin for both. Here are the seven steps you need to complete before making your first free call:
- Change FreePBX admin Password and Default Email
- Add Google Voice Account credentials
- Set Destination for Incoming Calls
- Change Extension 701 Passwords
- Eliminate Audio and DTMF Problems
- Install and Register a Softphone to Extension 701
- Activating Voice Recognition
1. Changing FreePBX admin Password and Default Email. From the main FreePBX GUI, click Admin => Administrators. Click on admin user in the far-right column. Enter a new Password and click Submit Changes button. Then click the Apply Config button. Next, set your default email address in the right margin of Admin -> Module Admin and save your entry.
2. Activating a Google Voice Trunk. To create a Trunk in FreePBX to handle calls to and from Google Voice, you’ll need three pieces of information from the Google Voice account you set up above: the 10-digit Google Voice phone number, your Google Voice account name, and your Google Voice password. Choose Connectivity -> Google Voice (Motif) from the FreePBX GUI. The following form will appear:
Fill in the blanks with your information and check only the top 2 boxes. If your Google Voice account name ends in @gmail.com, leave that out. Otherwise, include the full email address. Then click Submit Changes and Apply Config.
There’s one more step or your Google Voice account won’t work reliably with Incredible Pi! From the Linux command prompt while logged into your server as root, restart Asterisk: amportal restart
3. Setting a Destination for Incoming Calls. Now that you’ve created your Google Voice Trunk, we need to tell FreePBX how to process inbound calls when someone dials your Google Voice number. There are any number of choices. You could simply ring an extension. Or you could ring multiple extensions by first creating a Ring Group which is just a list of extension numbers. Or you could direct incoming calls to an Interactive Voice Response (IVR) system (we’ve actually set one up for you to play with).
By default, Incredible Pi is configured to route all incoming calls to a demo IVR that shows off some of the applications that come with Incredible Pi. You can change whenever you like by choosing Connectivity -> Inbound Routes -> Default. In the Set Destination section of the form, change the target to Extensions and then select 701 from the list. Then click Submit and Apply Config.
4. Changing Extension Passwords. From the main FreePBX GUI, choose Applications -> Extensions. Then click on 701 in the Extension List on the right side of your display. You’ll see a form that looks like this:
For now, we only need to make a few changes. First, you need a very secure password for both the extension itself and your voicemail account for this extension. The extension secret needs to be a combination of letters and numbers. The Voicemail Password needs to be all numbers, preferably six or more. Replace the existing 1234secret and 1234 with your own (very secure) entries. You also need to lock down this extension so that it is only accessible from devices on your private LAN. You do that with the deny and permit entries which currently are filled with zeroes. Leave the deny entry the way it is which tells Incredible Pi to block everybody except those allowed in the permit entry below. For the permit, we need the first three octets of your private LAN address, e.g. if your LAN is 192.168.0.something then the permit entry will be 192.168.0.0/255.255.255.0.
Finally, you need to plug in your actual email address in the Voicemail section so that voicemails can be delivered to you when someone leaves a message. You can also include a pager email address if you want a text message alert with incoming voicemails. If you want the voicemails to automatically be deleted from the server after they are emailed to you (a good idea considering the disk storage limitations of an SDHC card), change the Delete Voicemail option from No to Yes. That’s it. Now save your settings by clicking the Submit button. Then reload the dialplan by clicking on the red prompt when it appears.
In case you’re curious, unless you’ve chosen to automatically delete voicemails after emailing them, you can retrieve your voicemails by dialing *98701 from any extension on your phone system. You’ll be prompted to enter the voicemail password you set up. In addition to managing your voicemails, you’ll also be given the opportunity to either return the call to the number of the person that called or to transfer the voicemail to another extension’s voicemail box. And you can always leave a voicemail for someone by dialing their extension number preceded by an asterisk, e.g. *701 would let someone leave you a voicemail without actually calling you.
5. Eliminating Audio and DTMF Problems. You can avoid one-way audio on calls and touchtones that don’t work with these simple settings in FreePBX: Settings -> Asterisk SIP Settings. Just plug in your public IP address and your private IP subnet. Then set ULAW as the only Audio Codec.
6. Setting Up a Desktop Softphone. Incredible Pi supports all kinds of telephones, but we’ll start with the easy (free) one today. You can move on to “real phones” once you’re smitten with the VoIP bug. For today, you’ll need to download a softphone to your desktop PC or Mac.
7. Activating Voice Recognition for Incredible Pi Apps. Google now requires an API key to use their voice recognition services. This affects a number of Incredible Pi applications including the Yahoo Weather report service (951) which lets you say the name of a city to retrieve its weather forecast, dial by name to call anyone in your AsteriDex database (411), and the Wolfram Alpha almanac service which lets you look up almost anything (4747). The 5-minute tutorial to activate voice recognition is available in the PIAF Forum.
As we mentioned, the easiest way to get started with Incredible Pi is to set up a YATE softphone on your Desktop computer. Versions are available at no cost for Macs, PCs, and Linux machines. Just download the appropriate one and install it from this link. Once installed, it’s a simple matter to plug in your extension 701 credentials and start making calls. Run the application and choose Settings -> Accounts and click the New button. Fill in the blanks using the IP address of Incredible Pi, 701 for your account name, and whatever password you created for the extension. Click OK.
Once you are registered to extension 701, close the Account window. Then click on YATE’s Telephony Tab and place your first call. It’s that easy!
Monitoring Call Progress with Asterisk. That about covers the basics. We’ll leave you with a tip on how to monitor what’s happening with your PBX. There are several good tools within the FreePBX GUI. You’ll find them under the Reports tab. In addition, Asterisk has its own Command Line Interface (CLI) that is accessible from the Linux command prompt. Just execute the following command while logged in as root: asterisk -rvvvvvvvvvv.
Activating SAMBA for Windows Networking. SAMBA is included for transparent access using the Windows Networking Protocol from PCs, Macs, and other Linux machines. As delivered, SAMBA is deactivated. For obvious reasons, we recommend you never activate root login access to SAMBA without a very secure password. If you wish to enable SAMBA on your server, here are the steps while logged in as root:
- 1. Set SAMBA password for user root: smbpasswd -a root
- 2. Change Windows workgroup from WORKGROUP, if needed: nano -w /etc/samba/smb.conf
- 3. Manually start SAMBA from command prompt: service samba start
- 4. If desired, set SAMBA to start on boot: rcconf and activate SAMBA option
Activating the PPTP VPN Client. If you’ve followed the Nerd Vittles tutorial and previously set up a PPTP VPN Server for your devices, then it’s pretty simple to add Incredible Pi to the mix by activating its PPTP VPN client. You’ll need the FQDN or public IP address of your VPN server as well as a username and password for VPN access to your VPN server. Once you have those in hand, log into Incredible Pi as root.
Lest we forget to mention, you cannot log into your PPTP server from an IP address on the same private LAN so you’d only use the PPTP VPN when your Incredible Pi is at a remote location.
Edit the connection template: nano -w /etc/ppp/peers/my-pptp-server. Insert the following text and replace myfqdn.org with the FQDN of your PPTP server, replace myname with your PPTP username, and replace mypassword with your PPTP password. Then save the file: Ctrl-X, Y, then Enter.
To test it, issue the following command: /etc/init.d/pptp start. When you run ifconfig, you should now see a ppp0 entry:
ppp0 Link encap:Point-to-Point Protocol UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:3 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Remember, it won’t show an IP address if the Raspberry Pi and your PPTP VPN Server are on the same subnet (like ours). Once you install your Raspberry Pi in a remote location, you now can access it at the first IP address in your reserved PPTP IP address pool.
To permanently activate the PPTP VPN client on your Incredible Pi server, run rcconf. Scroll to the bottom of the list and highlight pptp. Press the space bar to select it for automatic startup when you boot your server. Then tab to OK and press Enter.
Activating Incredible Fax. With a 512MB Raspberry Pi, here are the 5 Simple Steps to activate Incredible Fax. The original tutorial is available here.
- Download and Install Incredible PBX 3.11
- Run the /root/fax-enable Script to Automatically Configure HylaFax
- Using FreePBX, Add Additional, Dedicated DID and Inbound Route to Handle Incoming Faxes
- Install Any Desktop HylaFax Client to Send Faxes via Print-to-Fax using any PDF
- Reboot Your Server and Enjoy
Incredible Trunks. When you’re ready to try some other SIP providers, here is a quick Cheat Sheet courtesy of Kristian Hare, who translated our original setups into a spreadsheet. Just click on the image below to open it in a new window. Then click on the redisplayed image to enlarge it.
Configuring CallerID Superfecta. In order to match names with phone numbers, Incredible PBX includes a FreePBX application named CallerID Superfecta. Out of the box, Incredible PBX 3.11 will work fine if you remember to activate CallerID Superfecta whenever you create a new Inbound Route. The CNAM entries also will be displayed in your CDR reports. For those not in the United States, you may prefer to use a lookup source for your numbers other than the ones preconfigured in CallerID Superfecta. You will find all of the available modules on the POSSA GitHub site. Just download the ones desired into /var/www/html/admin/superfecta/sources and then activate the desired sources in Admin -> CID Superfecta -> Default. You can test your results and the performance using the Debug facility that’s built into the module.
Adding Incredible Backup and Restore. Once you’ve expanded your SD card to an appropriate size, then you may wish to take a snapshot of your system and store it in a safe place. The new Incredible Backup 11 lets you do that. After installing the software, just run: /root/incrediblebackup. The backup image will be saved to the /tmp folder and can be copied to a different server easily. To restore the backup to another system, you simply bring the other system up to the same version of Asterisk (11) and FreePBX (2.11), and then run /root/incrediblerestore with your backed up image. To install the software, issue the following commands:
cd /root wget http://incrediblepbx.com/incrediblebackup11.tar.gz tar zxvf incrediblebackup11.tar.gz rm -f incrediblebackup11.tar.gz
Shutting Down Your Server. Last but not least, never just pull the plug when you want to shut down your server, or you may end up with corrupted MySQL databases. Then nothing will run. Instead, log into your server as root, and issue the following command: shutdown -h now. Enjoy!
Where To Go Next. Once you’ve done a little exploring, take a few minutes to read the complete tutorial on all 35 Incredible PBX applications for Raspberry Pi. A few require a bit of configuration before you start using them. And then you’ll want to explore Interconnecting Asterisk Servers with Incredible PBX and the Raspberry Pi. Enjoy!
Don’t forget to List Yourself in Directory Assistance so everyone can find you by dialing 411. And add your new number to the Do Not Call Registry to block telemarketing calls. Or just call 888-382-1222 from your new number.
Originally published: Monday, July 28, 2014
Support Issues. With any application as sophisticated as this one, you’re bound to have questions. Blog comments are a terrible place to handle support issues although we welcome general comments about our articles and software. If you have particular support issues, we encourage you to get actively involved in the PBX in a Flash Forums. It’s the best Asterisk tech support site in the business, and it’s all free! Please have a look and post your support questions there. Unlike some forums, ours is extremely friendly and is supported by literally hundreds of Asterisk gurus and thousands of ordinary users just like you. You won’t have to wait long for an answer to your question.
Need help with Asterisk? Visit the PBX in a Flash Forum.
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3CX is a software PBX that’s easy to install & manage. It includes integrated softphones, WebRTC conferencing and essential add-ons out of the box, at no additional cost. Try the free edition at www.3cx.com.
Some Recent Nerd Vittles Articles of Interest…
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