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How To: Use Command Injection to Pop a Reverse Shell on a Web Server

Command injection is a technique used by hackers to execute system commands on a server, usually via a web application or some kind of GUI. This can happen when an application provides some sort of functionality to the user involving the use of system commands. When the input is not properly sanitized, commands not originally intended to be run are allowed to be executed.

Hands-On: Kopin's Golden-i Infinity Is What Google Glass Was Supposed to Be, But Comes at a Cheaper Price

If you cover a particular area in tech long enough, you develop certain pet peeves, and one of mine happens to be devices that attempt to keep us wed to the Google Glass style of augmented reality. And while I remain mostly uninterested in such devices, one of these products recently earned my admiration and might work for you, too, under the right circumstances. It's called the Golden-i Infinity.

How To: 3 Reasons You Still Need a Good Antivirus App on Android

Many people think antivirus apps are useless — why pay a subscription fee when most malware can be avoided with common sense? But the thing is, there were an estimated 3.5 million malicious Android apps discovered last year, with many of them making their way onto the Play Store. As this number continues to rise, can you truly depend on common sense to protect you?

Instagram 101: How to Share Posts & Stories to All Your Close Friends' Feeds Only

Instagram is a great platform to share photos and videos with the world, but sharing with smaller groups is near impossible. You can directly message pictures, stories, or post links to friends, but that only works for one person at a time or in group chats you create. To share your content with a small group of people you care about the most, you'll want to use the "Close Friends" list.

How To: Your Android Phone Comes with a Face ID Feature Built In — Here's How to Use It

The iPhone X has a new unlocking mechanism called Face ID, which replaces the old Touch ID system since the phone no longer has a fingerprint sensor. The way it works is simple — you just look at the phone, it recognizes your face, then the system unlocks — so Apple deserves the praise they're getting for it. But did you know you can get almost this exact same feature on any Android device right now?

News: This Genetic Defect Could Be Why Typhoid Mary Never Got Typhoid Fever

Whether or not a microbe is successful at establishing an infection depends both on the microbe and the host. Scientists from Duke found that a single DNA change can allow Salmonella typhi, the bacteria that causes typhoid fever, to invade cells. That single genetic variation increased the amount of cholesterol on cell membranes that Salmonella and other bacteria use as a docking station to attach to a cell to invade it. They also found that common cholesterol-lowering drugs protected zebrafi...

News: How Gut Bacteria Could Set Off the Immune System in Rheumatoid Arthritis

As if the swollen, painful joints of rheumatoid arthritis weren't enough, the disease is the result of our immune system turning against cells of our own body. Ever since this realization, scientists have worked to find the trigger that sets the immune system off. Scientists believe that gut bacteria may have a role in initiating the abnormal immune response. Now, a team of researchers from Boston has figured out how that might occur.