For educational reasons I've decided to create my own CA. Here is what I learned.
Lets get some context first.
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| Latency Comparison Numbers (~2012) | |
| ---------------------------------- | |
| L1 cache reference 0.5 ns | |
| Branch mispredict 5 ns | |
| L2 cache reference 7 ns 14x L1 cache | |
| Mutex lock/unlock 25 ns | |
| Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
| Compress 1K bytes with Zippy 3,000 ns 3 us | |
| Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
| Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |
ScruffyRules
/ gitio.py
Last active
March 15, 2017 15:09
— forked from dotStart/gitio.py
Provides a simple Hexchat plugin for replacing GitHub URLs with shortened links.
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| # | |
| # Copyright 2015 Johannes Donath <johannesd@torchmind.com> | |
| # and other copyright owners as documented in the project's IP log. | |
| # | |
| # Licensed under the Apache License, Version 2.0 (the "License"); | |
| # you may not use this file except in compliance with the License. | |
| # You may obtain a copy of the License at | |
| # | |
| # http://www.apache.org/licenses/LICENSE-2.0 | |
| # |
gbaman
/ HowToOTG.md
Last active
July 19, 2024 11:47
Simple guide for setting up OTG modes on the Raspberry Pi Zero
Simple guide for setting up OTG modes on the Raspberry Pi Zero - By Andrew Mulholland (gbaman).
The Raspberry Pi Zero (and model A and A+) support USB On The Go, given the processor is connected directly to the USB port, unlike on the B, B+ or Pi 2 B, which goes via a USB hub.
Because of this, if setup to, the Pi can act as a USB slave instead, providing virtual serial (a terminal), virtual ethernet, virtual mass storage device (pendrive) or even other virtual devices like HID, MIDI, or act as a virtual webcam!
It is important to note that, although the model A and A+ can support being a USB slave, they are missing the ID pin (is tied to ground internally) so are unable to dynamically switch between USB master/slave mode. As such, they default to USB master mode. There is no easy way to change this right now.
It is also important to note, that a USB to UART serial adapter is not needed for any of these guides, as may be documented elsewhere across the int
jorritfolmer
/ qemu-kvm-ovirt-windows-server-2016.md
Last active
June 8, 2021 20:25
Installing Windows Server 2016 on oVirt qemu/kvm
The install fails with BSOD and "Your PC ran into a problem and needs to restart. We're just collecting some error info, and then we'll restart for you."
After reboot it returns with the following message: "The computer restarted unexpectedly or encountered an unexpected error. Windows installation cannot proceed. To install Windows, click OK to restart the computer, and then restart the installation.":
