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The Online World resources handbook

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Practical tips http://home.eunet.no/~presno/bok/12.html<br />

chances for further romance).<br />

File transfers through the Internet<br />

<strong>The</strong> Internet is a network interconnecting hundreds of thousands of computer centers around the<br />

world. <strong>The</strong>se centers use different types of hardware and software, and different methods of file<br />

transfer.<br />

What method to use for file transfers depends on the source host and the type of connection and<br />

software that you are using. For those using a web browser, it is usually very simple. Just click on the<br />

file's hyperlink to start the transfer.<br />

For those using the original method transferring files by FTP, the transfer usually takes place in<br />

two steps:<br />

1. Transferring files from a remote data center to your local mailbox host.<br />

2. Transfer from your local mailbox host to your personal computer.<br />

Transfers by email<br />

Transferring plain text files is easy. Files with imbedded word processor control codes will often have<br />

to be treated as binary files. More about this later.<br />

Getting text files from a mailing list library on a remote computer is a special case. Sometimes,<br />

these files are available from a web page or an ftp archive. If this is the case, clicking on a hyperlink is<br />

usually all it takes.<br />

However, sometimes you must send a retrieval command (like GET) by email to a remote center.<br />

After a while, the file will be sent to your mailbox by email. You can read it like you read other mail.<br />

Example: Retrieve the file MSDOS1. It explains how to retrieve binary art files from the Kidlink<br />

project's file libraries. You can also get it by sending an email to listserv@listserv.nodak.edu. Use the<br />

following general command syntax in your text:<br />

GET .<br />

To get the MSDOS1 file, write the following command in the TEXT of your message:<br />

GET KIDART.MSDOS1<br />

Note that these commands must always be put in the body of the mail and not in the subject field. <strong>The</strong><br />

file will arrive in your mailbox after a while.<br />

Also, lists of available files are usually available by using an "INDEX " command.<br />

To get a list of files in the KIDART directory, add the command "INDEX KIDART" in your message<br />

above.<br />

On some LISTSERV servers, the period between list name and file name is not being used.<br />

Libraries of other types of mailing lists may use other retrieval commands. Often, you can get<br />

information of what commands to use by sending the word HELP to a mailing service (in the Subject<br />

area or in the body of the text).<br />

Transferring binary files<br />

<strong>The</strong> easiest way of retrieving binary files across the Internet is by using a <strong>World</strong> Wide Web browser<br />

like Netscape, or Internet Explorer. You just give the program a file location address (URL), as in<br />

ftp://ftp.eunet.no/pub/text/online.txt.Z<br />

This address will give you the most current version of this <strong>handbook</strong> in Unix Z compress format.<br />

(Remove the trailing ".Z" to retrieve the ascii text version.)<br />

Users with a direct connection to the Internet usually also have access to the FTP command (File<br />

Transfer Protocol). Some of them prefer FTP for transfers of binary files like computer programs,<br />

pictures, sound, and compressed text files.<br />

<strong>The</strong> bad news is that the FTP command is not available to all users of Internet mail. <strong>The</strong>se must<br />

use "FTP by mail," or other tricks to transfer files. More about this in a moment.<br />

<strong>The</strong> FTP command gives access to a special file transfer service. It works in the following way:<br />

Logon to your local email host and enter 'FTP remote center code', as in this example: 'ftp<br />

134.129.111.1'.<br />

This command will connect you to the center in North Dakota mentioned above. Here, you will be<br />

prompted for user name and password. Enter 'anonymous' as user name, and use your real name or<br />

email address as password.<br />

This way of logging on to retrieve files is called "transfers by anonymous ftp." You can use this<br />

method on many hosts on the Internet.<br />

When connected to the remote center, you can request transfer of the desired file to your<br />

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