Why do I have to complete a CAPTCHA? Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. What can I do to prevent this in the future? If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not bitcoin-cli with malware.

If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. Another way to prevent getting this page in the future is to use Privacy Pass. There is a variety of ways to purchase Decred listed on the Decred website. This is similar to traditional Bitcoin mining.

PoW mining is described in more detail here. DCR in return for voting rights and a monetary reward. Decred is currently recruiting contractors – members of the community who are paid in Decred for their contributions. Check out this blog post for the details and how to get involved. If you are an online merchant, there are some payment processors listed on the Decred website which can help you accept Decred payments.


An alternative way to obtain Decred is to use your skills, knowledge, or experience by exchanging services for Decred as payment. Services can be anything that you are skilled at which are in need or requested by other members of the Decred community. M9 1a8 8 0 1 0 0 16A8 8 0 0 0 9 1zm. Join Stack Overflow to learn, share knowledge, and build your career. M9 1a8 8 0 1 0 0 16A8 8 0 0 0 9 1zM8 15.

I am getting issue in my Ubuntu regarding reinstalling of angular. I want to reinstall from angular 1. You can uninstall the current version of angular cli- 1. Not the answer you’re looking for? Browse other questions tagged npm angular-cli or ask your own question.

How do I completely uninstall Node. How do I update each dependency in package. Is it correct to say “0 hours”? Is life insurance a financially sound safety net? Can a ‘for’ loop inside of a ‘for’ loop use the same counter variable name? Why does one person have lots of stamina and another doesn’t?

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How do ‘greenhouse gases’ let heat in, but not let it out? Is there a scalar product s. How to deal with low-probability high-impact risks? How to avoid stripping screw heads?

Why does a lambda change overloads when it throws a runtime exception? Can I terminate an employee for qualifying for a job through a “degree mill? Is there a Layer 2 address advertising protocol? USD exchange prices, not volume-weighted averages, because the Ether market currently lacks sufficient depth and regional liquidity.

What Bitcoin does for payments, Ethereum does for anything that can be programmed. Ethereum’s vision is to decentralize the internet by creating a platform where applications can be built and run on a decentralized network with smart contracts. The blockchain, a type of decentralized network, is able to make agreements across the whole network, without any central authority. Bitcoin uses already blockchain technology to record and verify transactions without the need for a central bank. Services that are traditionally centralized can be decentralized using Ethereum. First, by requiring applications to pay Ether for every operation they perform, broken or malicious programs are kept from running out of control. Second, Ether is given as a reward to those who contribute their resources to the decentralized network.

Ether is more comparable to oil, valued for its utility in being used as a fuel, as well as the cost of usage. Strictly speaking, it should not be called a currency or coin. But since Ether is traded on cryptocurrency exchanges, the distinction is no longer relevant. The success of the Ethereum network is such that its token will quickly become very popular. Wei is the minimum unit of Ether, like cents to Dollars or pennies to Pounds or Satoshis to Bitcoin.

Looking for the best place to mine your own Ethers? The dedicated What is Ethereum wiki page. M9 1a8 8 0 1 0 0 16A8 8 0 0 0 9 1zm. Join Stack Overflow to learn, share knowledge, and build your career.

M9 1a8 8 0 1 0 0 16A8 8 0 0 0 9 1zM8 15. I variable holds the current index of the iteration. VS2005 it is ok bur in VS2003 it gives erroe. There was no for each block. I glossed over the part where he was asking about 2003. I don’t believe any of those apply automatically to IEnumerable. They certainly won’t take care of disposing the IEnumerable.

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This is the latest accepted revision, reviewed on 28 July 2018. HTTP is the protocol to exchange or transfer hypertext. Development of HTTP was initiated by Tim Berners-Lee at CERN in 1989. URL beginning with the HTTP scheme and the WWW domain name label.

HTTP is an application layer protocol designed within the framework of the Internet protocol suite. The first documented version of HTTP was HTTP V0. 2 was published as RFC 7540 in May 2015. An HTTP session is a sequence of network request-response transactions.

The HTTP Authentication specification also provides an arbitrary, implementation specific construct for further dividing resources common to a given root URI. The realm value string, if present, is combined with the canonical root URI to form the protection space component of the challenge. The request message, response header section, and response body are highlighted. GET The GET method requests a representation of the specified resource.

Requests using GET should only retrieve data and should have no other effect. This is also true of some other HTTP methods. One example of this occurring in practice was during the short-lived Google Web Accelerator beta, which prefetched arbitrary URLs on the page a user was viewing, causing records to be automatically altered or deleted en masse. The beta was suspended only weeks after its first release, following widespread criticism. Methods GET, HEAD, OPTIONS and TRACE, being prescribed as safe, should also be idempotent, as HTTP is a stateless protocol. Ignoring this recommendation, however, may result in undesirable consequences, if a user agent assumes that repeating the same request is safe when it isn’t. The standard reason phrases are only recommendations and can be replaced with “local equivalents” at the web developer’s discretion.

If the status code indicated a problem, the user agent might display the reason phrase to the user to provide further information about the nature of the problem. 1 a keep-alive-mechanism was introduced, where a connection could be reused for more than one request. Such persistent connections reduce request latency perceptibly, because the client does not need to re-negotiate the TCP 3-Way-Handshake connection after the first request has been sent. 1 introduced chunked transfer encoding to allow content on persistent connections to be streamed rather than buffered. HTTP pipelining further reduces lag time, allowing clients to send multiple requests before waiting for each response. The most popular way of establishing an encrypted HTTP connection is HTTPS. The status line and other header fields must all end with .

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Hello World, this is a very simple HTML document. Content-Type specifies the Internet media type of the data conveyed by the HTTP message, while Content-Length indicates its length in bytes. Most of the header lines are optional. When Content-Length is missing the length is determined in other ways.

Chunked transfer encoding uses a chunk size of 0 to mark the end of the content. Identity encoding without Content-Length reads content until the socket is closed. A Content-Encoding like gzip can be used to compress the transmitted data. The Gopher protocol was a content delivery protocol that was displaced by HTTP in the early 1990s. A semantically similar protocol to HTTP but used UDP or UDP-like messages targeted for devices with limited processing capability.

Hypertext Transfer Protocol Version 2, Use of TLS Features”. The Original HTTP as defined in 1991″. Archived from the original on 2001-11-21. URIs, Addressability, and the use of HTTP GET and POST”. 150227: HTTP proxy default configurations allow arbitrary TCP connections”.


Advanced Rails: Building Industrial-Strength Web Apps in Record Time. What Have We Learned From the Google Web Accelerator? Byte Range Retrieval Extension to HTTP. Wikimedia Commons has media related to HTTP. A detailed technical history of HTTP.

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Design Issues by Berners-Lee when he was designing the protocol. Jump to navigation Jump to search Not to be confused with Text-based user interface. Command-line interfaces to computer operating systems are less widely used by casual computer users, who favor graphical user interfaces or menu-driven interaction. Command-line interfaces are often preferred by more advanced computer users, as they often provide a more concise and powerful means to control a program or operating system. Programs with command-line interfaces are generally easier to automate via scripting. Compared with a graphical user interface, a command line requires fewer system resources to implement. Since options to commands are given in a few characters in each command line, an experienced user finds the options easier to access.


A command-line system may require paper or online manuals for the user’s reference, although often a “help” option provides a concise review of the options of a command. The command-line environment may not provide the graphical enhancements such as different fonts or extended edit windows found in a GUI. A program that implements such a text interface is often called a command-line interpreter, command processor or shell. Although the term ‘shell’ is often used to describe a command-line interpreter, strictly speaking a ‘shell’ can be any program that constitutes the user-interface, including fully graphically oriented ones.

For example, the default Windows GUI is a shell program named EXPLORER. These programs are shells, but not CLIs. Parameters: Most operating systems support a means to pass additional information to a program when it is launched. When a program is launched from an OS command line shell, additional text provided along with the program name is passed to the launched program. Interactive command line sessions: After launch, a program may provide an operator with an independent means to enter commands in the form of text.

Command lines from client processes may be redirected to a CLI program by one of these methods. Some applications support only a CLI, presenting a CLI prompt to the user and acting upon command lines as they are entered. Other programs support both a CLI and a GUI. In some cases, a GUI is simply a wrapper around a separate CLI executable file.

In other cases, a program may provide a CLI as an optional alternative to its GUI. Early computer systems often used teleprinter machines as the means of interaction with a human operator. The computer became one end of the human-to-human teleprinter model. The mechanical teleprinter was replaced by a “glass tty”, a keyboard and screen emulating the teleprinter. Smart” terminals permitted additional functions, such as cursor movement over the entire screen, or local editing of data on the terminal for transmission to the computer. Early operating system CLIs were implemented as part of resident monitor programs, and could not easily be replaced. The first implementation of the shell as a replaceable component was part of the Multics time-sharing operating system.

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The first Unix shell, the V6 shell, was developed by Ken Thompson in 1971 at Bell Labs and was modeled after Schroeder’s Multics shell. In November 2006, Microsoft released version 1. Unix shells with their proprietary object-oriented . Since 2001, the Macintosh operating system is based on a variation of Unix called Darwin.


On these computers, users can access a Unix-like command-line interface called Terminal found in the Applications Utilities folder. This section does not cite any sources. This is typically the case with operating system command shells. CLIs are also used by systems with insufficient resources to support a graphical user interface. CLIs are often used by programmers and system administrators, in engineering and scientific environments, and by technically advanced personal computer users.

CLIs are also popular among people with visual disability, since the commands and responses can be displayed using Refreshable Braille displays. This section needs additional citations for verification. Prompt – generated by the program to provide context for the client. Commands are usually one of three classes: Internal — recognized and processed by the command line interpreter itself and not dependent upon any external executable file.

Included — A separate executable file generally considered part of the operating environment and always included with the OS. External — External executable files not part of the basic OS, but added by other parties for specific purposes and applications. 1 paramN — Optional parameters provided by the client. The format and meaning of the parameters depends upon the command issued. In this example, the delimiters between command line elements are whitespace characters and the end-of-line delimiter is the newline delimiter. A CLI can generally be considered as consisting of syntax and semantics. The syntax is the grammar that all commands must follow.

Two different CLIs may agree on either syntax or semantics, but it is only when they agree on both that they can be considered sufficiently similar to allow users to use both CLIs without needing to learn anything, as well as to enable re-use of scripts. Advanced CLIs will validate, interpret and parameter-expand the command line before executing the specified command, and optionally capture or redirect its output. Unlike a button or menu item in a GUI, a command line is typically self-documenting, stating exactly what the user wants done. In addition, command lines usually include many defaults that can be changed to customize the results. One can modify the set of available commands by modifying which paths appear in the PATH environment variable. Under Unix, commands also need be marked as executable files. The directories in the path variable are searched in the order they are given.