Linux Directory Structure (File System Structure) Explained with Examples by Ramesh Natarajan on September 8, 2010 Have you wondered why certain programs are located under /bin, or /sbin, or /usr/bin, or /usr/sbin? For example, less command is located under /usr/bin directory. Why not /bin, or /sbin, or /usr/sbin? What is the different between all these directories? In this article, let us review the Linux filesystem structures and understand the meaning of individual high-level directories. 1. / – Root Every single file and directory starts from the root directory.Only root user has write privilege under this directory.Please note that /root is root user’s home directory, which is not same as /. 2. Contains binary executables.Common linux commands you need to use in single-user modes are located under this directory.Commands used by all the users of the system are located here.For example: ps, ls, ping, grep, cp. 3. 4. 5. Contains device files.These include terminal devices, usb, or any device attached to the system.For example: /dev/tty1, /dev/usbmon0 6. 7. 8. 9.
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10 Websites To Make You Think | The Online Learning Blog from Study2U Supposedly browsing the internet requires more brain power than watching television. Although judging from some of the websites we’ve come across that assumption is cast into doubt. Here’s some of the sites we like that might get your brain to sit up and listen. Ted A conference that started in 1984 bringing together experts in technology, entertainment and design quickly grew into so much more. New Scientist The New Scientist website carries new articles from the magazine as well as the NS archive of over 76,000 pieces. Big Think The Big Think website is a collection of ‘global thought leaders’ who offer their thoughts and analysis on world events and other important developments. Café Scientifque ‘for the price of a cup of coffee or a glass of wine, anyone can come to explore the latest ideas in science and technology’ Breathing Earth This fantastic website by David Bleja demonstrates CO2 emissions and world population growth in real time on a global map. Arts & Letters Daily How Stuff Works
Kensho For those who want to know: Reliable information on health, energy, media, war, elections, 9/11, more Universal property of music discovered Researchers at the Institute for Logic, Language and Computation (ILLC) of the University of Amsterdam have discovered a universal property of musical scales. Until now it was assumed that the only thing scales throughout the world have in common is the octave. The many hundreds of scales, however, seem to possess a deeper commonality: if their tones are compared in a two- or three-dimensional way by means of a coordinate system, they form convex or star-convex structures. Convex structures are patterns without indentations or holes, such as a circle, square or oval. Almost all music in the world is based on an underlying scale from which compositions are built. 1000 scales By placing scales in a coordinate system (an 'Euler lattice') they can be studied as multidimensional objects. The research results were recently published in the scientific Journal of New Music Research.