UTF stands for Unicode Transformation Format. The most popular version is UTF-8 which represents 8 bits or 8 one’s or zero’s. (11111111 -> 00000000). The secret though is that it uses up to 4 bytes. We know that 1 byte = 8 bits so 4 bytes gives us 32 bits. 8 bits can represent 255… Read More »
Here is a great write up explain what the cryptic symbols mean. https://medium.com/@codenameyau/step-by-step-breakdown-of-dev-null-a0f516f53158 Combine this with command -v to bypass “normal function lookup” from https://askubuntu.com/questions/512770/what-is-use-of-command-command we can use this to check if certain applications exist.
If you are running Ubuntu on Virtual Box you will want to make sure you can copy and paste between the to environments. Simply turning on Bidirectional won’t work using a normal Ubuntu ISO. You need to upgrade to Guess Addition. Guest Additions provide additional capability to a guest virtual machine, including file sharing and… Read More »
If you are working with json and want to view it in a pretty format within Sublime, you can install an extension very quickly. The long way on a Mac is to navigate to ~/Library/Application Support/Sublime Text 3/Packages and run this command from a terminal: git clone https://github.com/dzhibas/SublimePrettyJson.git Restart Sublime and the open up some unformatted json… Read More »
If you love Confluence shortcuts and use h1. My heading as a shortcut and discovered it no longer works, you are not the only one. It took a bit of searching to find out if “h1 in confluence still work?” The actual search term would be “Confluence Wiki Markup for Headings doesn’t work”. The docs… Read More »
An easy and fascinating read of a brief history to human kind. Definitely worth a read. There are four main periods highlighted in the book: The Cognitive Revolution (c. 70,000 BC, when Sapiens evolved imagination). The Agricultural Revolution (c. 10,000 BC, the development of agriculture). The unification of humankind (the gradual consolidation of human political organisations towards one global empire). The Scientific… Read More »
Run this command: > grep Revision /proc/cpuinfo and you should see some code print out like: Revision : a22082 Go to the site: https://elinux.org/RPi_HardwareHistory and search for the revision number. Done!
If you are trying to install Eclipse and you get the following error: The JVM shared library “/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/../lib/server/libjvm.dylib” does not contain the JNI_CreateJavaVM symbol. You want to: Right click the installer file and select ‘show package contents’ Go to Contents and open Info.plist At the bottom of this file, you’ll see a commented section… Read More »
It is actually a bit of a pain removing Java from OSX but by that I mean it’s only 3 steps instead of 1. Basically run these commands here: sudo rm -rf “/Library/Internet Plug-Ins/JavaAppletPlugin.plugin” sudo rm -rf “/Library/PreferencePanes/JavaControlPanel.prefPane” sudo rm -rf “~/Library/Application Support/Java” Reference: http://osxdaily.com/2017/06/16/uninstall-java-mac/
If you have the neat T48 walkie talkies and you want to know the frequencies of the various channels, here they are for your convenience. USA (22 Channels) Mhz 462.5625 462.5875 462.6125 462.6375 462.6625 462.6875 462.7125 467.5625 467.5875 467.6125 467.6375 467.6625 467.6875 467.7125 462.5500 462.5750 462.6000 462.6250 462.6500 462.6750 462.7000 462.7250 For the 8 channel… Read More »