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LINUX

History development linux and the types of linux

In 1969, Ken Thompson and Dennis Ritchie (also the developer of the C language), researchers at AT & T Bell Laboratories American, making the UNIX operating system, the forerunner of Linux. UNIX get great attention because it is the first operating system which is created not by the hardware maker. In addition, because all the source code created with C language, making it easier to transfer to a variety of platforms.

In a short time UNIX growing rapidly and split into two streams: UNIX developed by the University of Berkeley and was developed by AT & T. After it started many companies are involved, and there was a competition that involves many companies to take control in the field of operating systems. This competition led to the need for standardization. From this was born the project that was driven by the IEEE POSIX (The Institute of Electrical and Electronics Engineers), which aims to set the standard UNIX specification. However, these standards do not relieve the competition. Since then, appear various types of UNIX.

One of them was made by the U.S. MINIX Tanenbaum for educational purposes. MINIX source code is that by Linus Torvalds, a student at the University of Helsinki, was used as a reference to create a new operating system is free and the source code can be accessed by the public. The operating system is then given the name Linux. In building Linux, Linus uses tools from the Free Software Foundation's GNU licensed. Then to make Linux a complete operating system, he put the programs that are also licensed under GNU.

Technically and short it can be said, Linux is an operating system that is multi-user and multitasking, which can run on various platforms, including INTEL processor 386 and higher. The operating system implements standard POSIX . Linux can interoperate well with other operating systems, including Apple, Microsoft and Novell.

Starting from the Unix operating system developed and implemented in the 1960s and was first released in 1970. Its wide availability and portability meant that it can be used, copied and modified extensively by academic institutions and the business.

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TORNADO

A tornado is a fast rotating column of air that forms the connection between clouds or cumulonimbus in rareoccurrences of cumulus cloud base with ground level. A tornado appears in many sizes but thecondensation funnel-shaped generally obvious that ends that touches the Earth narrows and oftensurrounded by clouds that bring debris.

Generally the tornadoes have wind speeds of 177 km/h or more with an average reach of 75 m and travels a few kilometers before disappearing. Some of the tornadoes which reached wind speeds of more than 300-480 km/h has a width of more than one mile (1.6 km) and can survive on the surface with more than 100km. Although tornadoes have been observed on every continent except Antarctica, tornadoes are more commonin the United States. The Tornado also generally occur in southern Canada, South–Central and EasternAsia, East-Central South Africa, Latin America, Central and North-Western Europe, Italy, Western and Southern Australia, and New Zealand.

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Table of contents

1 Definitions

2 Etymology

3 types of

3.1 true Tornadoes

4 references

5 further reading

6 external links

The definition of the

A tornado near Seymour, Texas.

A tornado is defined by the glossary of meteorology as a “rotating column of air tight with the surface of thesoil and emerges from the cloud cumuliform cloud cumuliform or the bottom and often (but not always) appears as a funnel cloud.

Condensation Funnel

Tornado should not appear; However, the intensity of low pressure caused by the high wind speeds (seeBernoulli‘s principle) and spin (related to cyclostrophic balance) often causes water vapor condense in the air that cause condensation funnel. The winds of the Tornado Vortex is not a cloud condensation.

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Joey Alexander

Joey Alexander (born Josiah Alexander Sila; June 25, 2003) is an Indonesian jazz pianist and child prodigy. He released his first album, My Favorite Things, on May 12, 2015, at age 11. Alexander taught himself to play jazz at age six, and has performed for Herbie Hancock, Bill Clinton and Barack Obama. In 2014, Wynton Marsalis invited Alexander to play at the Jazz at Lincoln Center's 2014 gala, which made him an "overnight sensation", according to The New York Times. Alexander won the Grand Prix at the 2013 Master-Jam Fest, and performed at the Montreal and Newport Jazz Festivals in 2015.

Alexander is the first Indonesian act to enter the Billboard 200 chart in the United States, where My Favorite Things debuted at number 174 on the week ending May 30, 2015, re-entered and peaked at number 59 in January 2016.

Early life

Josiah Alexander Sila was born in the city of Denpasar, in Bali, Indonesia, to parents Denny Sila and Farah Leonora Urbach, who ran an adventure tourism business. His father was an amateur musician, and both parents were fans of jazz music, particularly the works of Louis Armstrong. He is the nephew of the rock singer Nafa Urbach, and the Indonesian musician and song-writer Alam Urbach. Alexander learned about jazz by listening to classic albums his father gave him. By age six he had taught himself to play piano using a miniature electric keyboard his father brought home for him, learning by ear compositions such as Thelonious Monk's "Well, You Needn't" and other songs from his father's jazz collection. Alexander later said learning the instrument came naturally for him; he considers his ability "a gift from God". Alexander considers Monk, John Coltrane, Harry Connick, Jr., Bill Evans and Herbie Hancock among his main musical influences, and also particularly admires Clifford Brown, Miles Davis, Wynton Marsalis, Brad Mehldau, Lee Morgan, Horace Silver and McCoy Tyner.

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