1.
Shell script
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A shell script is a computer program designed to be run by the Unix shell, a command-line interpreter. The various dialects of shell scripts are considered to be scripting languages, typical operations performed by shell scripts include file manipulation, program execution, and printing text. A script which sets up the environment, runs the program, the typical Unix/Linux/Posix-compliant installation includes the Korn Shell in several possible versions such as ksh88, Korn Shell 93 and others. On the other hand, the various shells plus tools like awk, sed, grep, other shells available on a machine or available for download and/or purchase include ash, msh, ysh, zsh, the Tenex C Shell, a Perl-like shell and others. Related programmes such as based on Python, Ruby, C, Java, Perl, Pascal. Another somewhat common shell is osh, whose manual page states it is an enhanced, the user could then simply use l for the most commonly used short listing. Another example of a script that could be used as a shortcut would be to print a list of all the files and directories within a given directory. In this case, the script would start with its normal starting line of #. /bin/sh. Following this, the script executes the command clear which clears the terminal of all text before going to the next line, the following line provides the main function of the script. The ls -al command list the files and directories that are in the directory from which the script is being run, the ls command attributes could be changed to reflect the needs of the user. Note, If an implementation does not have the command, try using the clr command instead. /build to create the updated program, test it. Since the 1980s or so, however, scripts of this type have been replaced with utilities like make which are specialized for building programs, a modern shell script is not just on the same footing as system commands, but rather many system commands are actually shell scripts. Like standard system commands, shell scripts classically omit any kind of filename extension unless intended to be read into a shell through a special mechanism for this purpose. With these sorts of features available, it is possible to write reasonably sophisticated applications as shell scripts, the standard Unix tools sed and awk provide extra capabilities for shell programming, Perl can also be embedded in shell scripts as can other scripting languages like Tcl. Perl and Tcl come with graphics toolkits as well, the specifics of what separates scripting languages from high-level programming languages is a frequent source of debate. But generally speaking a language is one which requires an interpreter. While files with the. sh file extension are usually a script of some kind. Perhaps the biggest advantage of writing a script is that the commands
2.
Saint Helena
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It is part of the British Overseas Territory of Saint Helena, Ascension and Tristan da Cunha. Saint Helena measures about 16 by 8 kilometres and has a population of 4,534 and it was named after Saint Helena of Constantinople. The island, one of the most remote islands in the world, was uninhabited when discovered by the Portuguese in 1502 and it was an important stopover for ships sailing to Europe from Asia and South Africa for centuries. Napoleon was imprisoned there in exile by the British, as were Dinuzulu kaCetshwayo, between 1791 and 1833, Saint Helena became the site of a series of experiments in conservation, reforestation and attempts to boost rainfall artificially. This environmental intervention was closely linked to the conceptualisation of the processes of environmental change, Saint Helena is Britains second-oldest remaining overseas territory after Bermuda. The Portuguese found the island uninhabited, with an abundance of trees and they imported livestock, fruit trees and vegetables, and built a chapel and one or two houses. Englishman Sir Francis Drake probably located the island on the leg of his circumnavigation of the world. In developing their Far East trade, the Dutch also began to frequent the island, the Dutch Republic formally made claim to Saint Helena in 1633, although there is no evidence that they ever occupied, colonized, or fortified it. By 1651, the Dutch had mainly abandoned the island in favour of their colony at the Cape of Good Hope. In 1657, Oliver Cromwell granted the English East India Company a charter to govern Saint Helena and, the following year, the first governor Captain John Dutton arrived in 1659, making Saint Helena one of Britains oldest colonies outside North America and the Caribbean. A fort and houses were built, after the Restoration of the English monarchy in 1660, the East India Company received a royal charter giving it the sole right to fortify and colonise the island. The fort was renamed James Fort and the town Jamestown, in honour of the Duke of York, between January and May 1673, the Dutch East India Company forcibly took the island, before English reinforcements restored English East India Company control. The company experienced difficulty attracting new immigrants, and sentiments of unrest, a census in 1723 recorded 1,110 people, including 610 slaves. The island enjoyed a period of prosperity from about 1770. Captain James Cook visited the island in 1775 on the leg of his second circumnavigation of the world. St. James Church was erected in Jamestown in 1774, the site of this telescope is near Saint Mathews Church in Hutts Gate in the Longwood district. The 680-metre high hill there is named for him and is called Halleys Mount, throughout this period, Saint Helena was an important port of call of the East India Company. East Indiamen would stop there on the leg of their voyages to British India
3.
Saint Helena, Ascension and Tristan da Cunha
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Its name was Saint Helena and Dependencies until 1 September 2009, when a new constitution came into force giving the three islands equal status within the territory. Despite this change, the territory is still commonly referred to as simply Saint Helena after its main island. Similarly, the demonym Saint Helenians and the name for the local nationality is commonly understood to include Ascension Islanders and Tristanians. Administratively, the territory is divided into the three parts as the territorys geography, namely Saint Helena, Ascension and Tristan da Cunha. Each is governed by a council, the island of St Helena is then further divided into eight districts. The Portuguese found Saint Helena uninhabited, with an abundance of trees and they imported livestock, fruit trees and vegetables, and built a chapel and one or two houses. Though they formed no permanent settlement, the island became important for the collection of food. Englishman Sir Francis Drake very probably located the island on the lap of his circumnavigation of the world. In 1657, the English East India Company was granted a charter to govern Saint Helena by Oliver Cromwell, and the following year the Company decided to fortify and colonise the island with planters. The first governor, Captain John Dutton, arrived in 1659, a fort was completed and a number of houses were built. After the Restoration of the English monarchy in 1660, the East India Company received a Royal Charter giving it the right to fortify. The fort was renamed James Fort and the town Jamestown, in honour of the Duke of York and heir apparent, later King James II of England. The Kingdom of England became part of the new Kingdom of Great Britain in 1707 and then the United Kingdom in 1801, the most important and first settled, the island of Saint Helena, had been governed by the East India Company since 1659. For similar reasons Tristan da Cunha was annexed as a dependency of the Cape Colony on 14 August 1816, for a short period just prior, Tristan da Cunha had been inhabited by a private American expedition who named the territory the Islands of Refreshment. The political union between these colonies began to shape on 12 September 1922, when by letters patent Ascension Island became a dependency of Saint Helena. Lightly populated Tristan da Cunha, even today more than an outpost with a population of less than three hundred, followed suit on 12 January 1938. The United Kingdom and the United States still jointly operate the airfield on Ascension, which serves as a space-based communications, signals intelligence. One of only four GPS satellite ground antennas is located there, between Saint Helena and Tristan da Cunha is the Tropic of Capricorn
4.
Internet
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The Internet is the global system of interconnected computer networks that use the Internet protocol suite to link devices worldwide. The origins of the Internet date back to research commissioned by the United States federal government in the 1960s to build robust, the primary precursor network, the ARPANET, initially served as a backbone for interconnection of regional academic and military networks in the 1980s. Although the Internet was widely used by academia since the 1980s, Internet use grew rapidly in the West from the mid-1990s and from the late 1990s in the developing world. In the two decades since then, Internet use has grown 100-times, measured for the period of one year, newspaper, book, and other print publishing are adapting to website technology, or are reshaped into blogging, web feeds and online news aggregators. The entertainment industry was initially the fastest growing segment on the Internet, the Internet has enabled and accelerated new forms of personal interactions through instant messaging, Internet forums, and social networking. Business-to-business and financial services on the Internet affect supply chains across entire industries, the Internet has no centralized governance in either technological implementation or policies for access and usage, each constituent network sets its own policies. The term Internet, when used to refer to the global system of interconnected Internet Protocol networks, is a proper noun. In common use and the media, it is not capitalized. Some guides specify that the word should be capitalized when used as a noun, the Internet is also often referred to as the Net, as a short form of network. Historically, as early as 1849, the word internetted was used uncapitalized as an adjective, the designers of early computer networks used internet both as a noun and as a verb in shorthand form of internetwork or internetworking, meaning interconnecting computer networks. The terms Internet and World Wide Web are often used interchangeably in everyday speech, however, the World Wide Web or the Web is only one of a large number of Internet services. The Web is a collection of interconnected documents and other web resources, linked by hyperlinks, the term Interweb is a portmanteau of Internet and World Wide Web typically used sarcastically to parody a technically unsavvy user. The ARPANET project led to the development of protocols for internetworking, the third site was the Culler-Fried Interactive Mathematics Center at the University of California, Santa Barbara, followed by the University of Utah Graphics Department. In an early sign of growth, fifteen sites were connected to the young ARPANET by the end of 1971. These early years were documented in the 1972 film Computer Networks, early international collaborations on the ARPANET were rare. European developers were concerned with developing the X.25 networks, in December 1974, RFC675, by Vinton Cerf, Yogen Dalal, and Carl Sunshine, used the term internet as a shorthand for internetworking and later RFCs repeated this use. Access to the ARPANET was expanded in 1981 when the National Science Foundation funded the Computer Science Network, in 1982, the Internet Protocol Suite was standardized, which permitted worldwide proliferation of interconnected networks.5 Mbit/s and 45 Mbit/s. Commercial Internet service providers emerged in the late 1980s and early 1990s, the ARPANET was decommissioned in 1990
5.
Country code
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Country codes are short alphabetic or numeric geographical codes developed to represent countries and dependent areas, for use in data processing and communications. Several different systems have developed to do this. The term country code frequently refers to international dialing codes, the E.164 country calling codes and this standard defines for most of the countries and dependent areas in the world, a two-letter a three-letter, and a three-digit numeric code. For more applications see ISO 3166-1 alpha-2. S. government and in the CIA World Factbook, on September 2,2008, FIPS 10-4 was one of ten standards withdrawn by NIST as a Federal Information Processing Standard. GOST7.164 international telephone dialing codes, list of country calling codes with 1-3 digits and these prefixes are legally administered by the national entity to which prefix ranges are assigned. Diplomatic license plates in the United States, assigned by the U. S. State Department, north Atlantic Treaty Organisation used two-letter codes of its own, list of NATO country codes. They were largely borrowed from the FIPS 10-4 codes mentioned below, in 2003 the eighth edition of the Standardisation Agreement adopted the ISO3166 three-letter codes with one exception. The following can represent countries, The initial digits of International Standard Book Numbers are group identifiers for countries, areas, the first three digits of GS1 Company Prefixes used to identify products, for example, in barcodes, designate numbering agencies. A comparison with ISO, IFS and others with notes United Nations Region Codes
Saint Helena, Ascension and Tristan da Cunha