Daily Shaarli
June 13, 2022
Here you can download the Linux Kernel Crash Book, in PDF format. The book is 182 pages long, contains 113 screenshots and weighs 4.87MB.
https://www.dedoimedo.com/computers/www.dedoimedo.com-crash-book.pdf
Below, you can find links to the original seven articles that comprise the Kernel Crash series, starting with LKCD and Kdump, via specific setup on CentOS and openSUSE, ending with collection and analysis of memory cores.
zxcvbn is a password strength estimator inspired by password crackers. It recognizes and analyzes over 40 thousand common passwords using pattern matching and conservative estimation and filters out common first names, last names, popular words from Wikipedia and common words in many cultures, and recognizes common patterns like dates, repetitions (e.g. 'aaa'), sequences (e.g. 'abcd'), keyboard smashes (e.g. 'qwertyuiop'), and l33t speak.
Consider using zxcvbn as an algorithmic alternative to password composition policy — it is more secure, flexible, and convenient in websites that require a minimal complexity score.
Analyzing Linux kernel crash dumps with crash - The one tutorial that has it all
Updated: June 14, 2010
This article is a part of my Linux Kernel Crash Book. It is available for free download in PDF format!
Finally, the big moment has come. Reading the information displayed by the crash utility, understanding what those curious lines mean and hacking your way through the problem to the other side.
What scientists know about "infantile amnesia." //
Despite the fact that people can’t remember much before the age of 2 or 3, research suggests that infants can form memories—just not the kinds of memories you tell about yourself. Within the first few days of life, infants can recall their own mother’s face and distinguish it from the face of a stranger. A few months later, infants can demonstrate that they remember lots of familiar faces by smiling most at the ones they see most often.
In fact, there are lots of different kinds of memories besides those that are autobiographical. There are semantic memories, or memories of facts, like the names for different varieties of apples, or the capital of your home state. There are also procedural memories, or memories for how to perform an action, like opening your front door or driving a car.
Research from psychologist Carolyn Rovee-Collier’s lab in the 1980s and 1990s famously showed that infants can form some of these other kinds of memories from an early age. Of course, infants can’t exactly tell you what they remember. So the key to Rovee-Collier’s research was devising a task that was sensitive to babies’ rapidly changing bodies and abilities in order to assess their memories over a long period.
It’s important to remember that a red flag law is effectively a societal nod to strip someone of their 2nd Amendment right, not because they committed a crime, but because you think they might. More accurately, someone can be stripped of their right to bear arms off of the mere accusation that they intend to cause harm. //
Red flag laws are ripe for abuse and we already have leftists with blue check marks on Twitter openly admitting that they’re ready to take advantage of them just by claiming an innocent man is insane for wanting to defend his children from people who want to take them in order to indoctrinate them with radicalized thought. //
Without the right to gun ownership, the rest of the Bill of Rights is a wishlist. Do we really want to live in a world where someone like Eric Swalwell can wave his hand and strip you of rights given to you by God?
When faced with these conditions, our bodies call upon a well-known mechanism to keep us from overheating: sweating. As perspiration evaporates from the skin, it cools the body’s temperature. But if the air is not only hot but also already filled with moisture, less sweat can evaporate, and this safety feature fails. In India, high temperatures and humidity are increasingly combining to pose a deadly threat—one the country isn’t prepared for.
This danger to human life is measured using “wet-bulb temperature”—the lowest temperature that air can be cooled to via evaporation. It’s determined by wrapping the bulb of a thermometer in a wet cloth and seeing what temperature is recorded. Essentially the bulb is you—or me, or Lakshmanan—the wet cloth is our sweating skin, and the temperature recorded is the coolest we can hope to get by sweating.
When heat and humidity combine to push wet-bulb temperatures past 32° Celsius, physical exertion becomes dangerous. Consistent exposure to high wet-bulb temperatures—35° Celsius and above—can be fatal. At this point the sweating mechanism shuts down, leading to death in six hours. //
At night the body should recover from the daytime assault of heat, but because nights are getting hotter, that recovery is hampered, says Dutta. Whenever people talk about the effects of heat, they usually refer to its direct effects—such as heat exhaustion and stroke, which can be fatal or debilitating—but these are only the tip of the iceberg, he says. “If heat stays high in the night, it affects the body’s homeostasis, its ability to regulate and maintain its internal body temperature.” Upset this and your cellular and metabolic activities become disrupted, which can be a driver of disease, and can even be fatal itself.