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How do you identify text and binary file in Linux?

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2009-03-27 21:16:35
2009-03-27 21:16:35

You can distinguish between binary and text files, and for the most part even identify what type of binary file, by using the "file" command. For example:

~$ file unknownfile

unknownfile: PNG image data, 155 x 155, 8-bit/color RGBA, non-interlaced

This tells you that the file is a PNG file by reading metadata and/or magic numbers in the file. When used on a text file, the command will return "ASCII text" or "Unicode text."

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Related Questions


There are several tools that let you examine the inside of a binary file in Linux. One of them is called "hexdump" (see "man hexdump"). Another is "od" (octal dump - though either of these can output the file in various formats). Also, you may want to try "strings" - this shows all the text strings in a file.

No, PHP is text file with .php extension.

Difference between binary and text file in Java Programming Language:- (a) We directly open the text file and see the contents of its but we can't do with the binary file, if we do than it will shows different combination 0's and 1'. (b) It in machine readable format, only machine can read it. (c) It is in encrypted form, so the it more secure than a text file. Bhutesh Kumar

Text files are human-readable, binary files aren't. Note: There are some characters that are not common in text files, like 00H-08H,0BH,0E-1FH,7FH.

Two file modes are "text" and "binary". Text is used for human readable data, such as a C source file, or a notepad text file. Binary is used for computer readable data, such as an executable object file. Two other file modes are "sequential" and "random". Sequential is used when the file is accessed serially, from the beginning to the end, and can be used for both text and binary files. Random is used when the file is accessed non-serially, often jumping around from place to place. An example of random is a database file.

There are two file types in C++ namely, text file and binary file. In text file EOF or end of file is represented by an end of file character having ASCII 26. In binary files EOF or end of file is represented by NULL in the file pointer

windows support 2 file formats 1.text file 2.binary file in a text file in windows , each line is teminated with a carriage reurn followed by a linefeed character .but when a file is read by a c prog in text mode,c library converts carriage reurn/ linefeed character both in to a single linefeed character. but in case of binary file ,the prog will see both carriage return & linefeed character

You cannot convert a .scr file into a Word document. A .scr file is a screensaver binary. It would have little or no text data, only binary.

There is no distinction because text files are also binary files. Although text files do represent printable text, there are many different ways to encode plain text, whether as single byte ASCII characters or as multi-byte UNICODE. Prior to processing any plain text file, the file must first be treated as being a binary file in order to determine how the file was encoded. Even so, byte order marks and/or XML tags are optional in plain text files, so it may not be possible to determine the correct encoding method other than by examining the file's content in full, searching for certain character sequences that simply should not be present in a plain text file. If none are found it may be safe to assume the file really is plain text, but there are no guarantees.

Text file contains printable characters and consists of lines.

A text file is a file that is properly understood as a sequence of character data (represented using ASCII, Unicode, or some other standard), separated into lines. Typically, when a text file is displayed as a sequence of characters, it is easily human-readable.A binary file is anything else. A binary file will include some data that is not written using a character-encoding standard - typically, some number would be represented using binary within the file, instead of using the character representation of its various digits (in some base).

You can are ASCII-tabellen. For converting binary to text

By using whatever tool is associated with that file type. There are dozens of text, graphics, audio, and video editors.

A bdat file is a binary data file. It contains data that is not in the form of text. The data is encoded for the purposes of computer storage and processing.

A binary file is a computer file which may contain any type of data, encoded in binary form for computer storage and processing purposes; for example, computer document files containing formatted text. Many binary file formats contain parts that can be interpreted as text; binary files that contain only textual data - without, for example, any formatting information - are called plain text files. In many cases, plain text files are considered to be different from binary files because binary files are made up of more than just plain text. When downloading, a completely functional program without any installer is also often called program binary, or binaries (as opposed to the source code).A text file (sometimes spelled "textfile") is a generic description of a kind of computer file in a computer file system.[1] At this generic level of description, there are two kinds of computer files: 1) text files; and 2) binary files.[2] This broad two-level distinction is widely recognized and applied in computing, even though it can be misleading,and subject to differing interpretation

HI... When you access a file from within C or C++ you have a choice between treating the file as a binary file or as a text file. C uses the fopen(file,mode) statement to open a file and the mode identifies whether you are opening the file to read, write, or append and also whether the file is to be opened in binary or text mode. C++ opens a file by linking it to a stream so you don't specify whether the file is to be opened in binary or text mode on the open statement. Instead the method that you use to read and/or write to the file determines which mode you are using. If you use the operator to read from the file and the >> operator to write to the file then the file will be accessed in text mode. If instead you use the put() and get() or read()and write() functions then the file will be accessed in binary mode. So what exactly is the difference between text and binary modes? Well the difference is that text files contain lines (or records) of text and each of these has an end-of-line marker automatically appended to the end of it whenever you indicate that you have reached the end of a line. There is an end of line at the end of the text written with the C fwrite() function or in C++ when you . Binary files are not broken up into separate lines or records so the end-of line marker is not written when writing to a binary file. Reading from a text file or binary file is different too as a text file is automatically broken up into separate records as it read in based on the location of the end-of-line markers. So what is this end-of-line marker? Well that depends on the operating system that you are using. The Apple Macintosh computers use a single carriage return as the end-of-line marker (x'0D') while Unix based operating systems including Linux use a single line-feed character (x'0A'). Most PC based systems including DOS, all versions of windows, and OS/2 use a carriage return/line feed combination (x'0D0A') as the end-of-line marker. C and C++ terminate strings with a low value character (x'00'). So what happens when we read from a text file is that the end-of-line character for the operating system that we are using gets converted into a low value end-of-string indicator and when we write to a file the appropriate end-of-line character(s) get written when we indicate the end of the line. This makes the reading and writing of text files much easier because the appropriate end-of-line markers are handled for us. With a binary file none of these conversions take place. When we read a binary file the end-of-line characters for our operating system will be read into the string and treated no different than any other character. When we write to a binary file the only end-of-line markers that are written will be those that we code into the output ourselves and hence will be exactly as we code it regardless of the operating system that we are running on. This makes it much easier for us when the file does not contain straight text and the end-of-line marker does not separate lines of text but rather appears as part of the non-text data content of the file. A binary file can contain text but the text that it contains is not considered to be broken up into a number of lines by the occurrence of end-of-line markers. A binary file may alternatively contain information that contains no text whatsoever. It is up to the program reading the file to make sense of the data contained in a binary file and convert it into something meaningful (eg. an image or a series of fixed length records). Regards Neelagiri

"ASCII file" refers to a "text" file that is readable by the naked eye (it only contains the letters a-z, numbers, carriage returns, and punctuation marks). Conversely, a binary fie is not readable by the naked eye (it contains the ASCII characters in addition to binary codes).

That would depend entirely on what type of file you are trying to create. echo text > file.txt would create a text file with the text "text". Other types of files, such as database dumps, program binaries, and even video can be created with various programs.

On an ordinary text file this cannot be done via any OS or terminal, as the file cannot store such attributes. On other files, this depends on the software used to edit the file.

first the voice must be converted to digital signal then the binary file need to be converted into text file using c,c++. by sh..?

There are two questions that should be answered here. What is ASCII file and what is binary file? The binary file contains information in bytes. "00AAFF12" this is 4 bytes in HEX (base 16) representation. And every file for computer is only sequence of bytes, this means every file is binary file. When we talk about ASCII, we often use that to note that there should be a text inside file. What is ASCII? It is encoding there each byte represents a character from predefined characters table. Again the same file contains only bytes and is binary file too. The only difference is in what context you use them. Binary file is often used when we talk about non standard file which do not have structure or does have, but it is not possible to read it with any standard tool until you find a way. When you mention ASCII, you tell that the specific file should be interpreted as it has text inside it (one byte equals one character).

Anything can be made into a command on a Linux system. The steps are easy. First, using any text editor (vim, emacs, etc.) create a text file. Put anything you want to do in this file. Save the file. Make sure the file you just created has read and execute permissions (chmod). That's it! Now you have a command that you can execute in Linux.

print the contents of a text file onto the screen (like the "type" command in DOS).


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