file - determine file type.

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3
votes
2answers
72 views

How to list files on terminal so that we can see the file types such executable, ascii etc?

I have been trying to list files in directory using ls and passing it different options. Does it have the ability to list types of files as well ? I want to know which ones are executable , ...
3
votes
2answers
117 views

How to list only JPEG files from root below using the command line?

I am searching for a method to find only JPEG files/ With my limited knowledge of Linux I came to this point: list all paths that exist from root below with find / pipe the result into next command ...
2
votes
2answers
95 views

file command apparently returning wrong MIME type

Why doesn't the following return text/csv? $ echo 'foo,bar\nbaz,quux' > temp.csv;file -b --mime temp.csv text/plain; charset=us-ascii I used this example for extra clarity but I'm also ...
1
vote
3answers
41 views

Find file by magic pattern maching

There is a bash command file(1) which outputs a file's contents type according to the matching pattern definitions in the /etc/magic and /usr/share/misc/magic. Is there a way to use these pattern ...
1
vote
1answer
62 views

How to check the file type in a script

I want to do a loop for all the images in a directory. The images doesn't have extension so I have to read the first bytes of the image to know its type. The loop should end up being something like. ...
-1
votes
2answers
153 views

Check if a file is a text file in bash

I am trying to make a check to see if the file being attached to the email is a text file, and if it is not it returns an error. However during testing, I provide a valid text.txt and it returns the ...
8
votes
2answers
479 views

Finding a file type assuming wrong extension

I have an image archive I keep up. Sometimes, the sites I pull them from reformat the file while keeping the extension the same, most often making PNG images into JPG's that are still named ".png". ...
5
votes
1answer
74 views

file(1) and magic(5) : prioritizing a result

My question follows that one: file(1) and magic(5) : describing other formats . I want to describe a FASTA sequence ( http://en.wikipedia.org/wiki/FASTA_format) It could be a DNA sequence (with only ...
7
votes
1answer
155 views

file(1) and magic(5) : describing other formats

Can I use file and magic ( http://linux.die.net/man/5/magic ) to override the description of some other known formats ? for example, I would like to describe the following formats: BED: ...
0
votes
2answers
172 views

File command database and identifying text files

Please let me know if below two statements are correct or not: Folder /usr/share/mime/magic has a database/table that will give me what are the current possible file formats (outputs that I can get ...
7
votes
4answers
860 views

Linux file command classifying files

I need to recognize type of data contained in random files. I am new to Linux. I am planning to use the file command to understand what type of data a file has. I tried that command and got the ...
3
votes
1answer
66 views

Test for a particular file format

This is a followup to Normal looking text file, detected by file as ASCII Pascal program text It seems file can't be trusted all the time. It seems possible that a particular file may be detected ...
18
votes
2answers
617 views

What does “magic tests” mean for the file command?

I was reading about the file command and I came across something I don't quite understand: file is designed to determine the kind of file being queried.... file accomplishes this by performing ...
1
vote
2answers
172 views

`file` doesn’t show proper mime-type for .m2ts files

I need to define mime type of various video files and I got a problem with .m2ts files. Before I stumbled on this, I used file utility with -iL keys and parsed the output with sed. Today I found that ...
4
votes
1answer
131 views

What's the story behind command file's suggestion?

While I'm reading file(1) I noticed this in the man page (emphasis mine): When adding local definitions to /etc/magic, make sure to preserve these keywords. Users depend on knowing that all the ...
6
votes
3answers
1k views

Fast way to determine if a file is a SQLite database

I am looking for a way to determine file types in a folder with thousands of files. File names do not reveal much and have no extension but are different types. Specifically I am trying to determine ...
2
votes
1answer
541 views

Detect file-type with the help of magic-file and rename file-suffix accordingly

I have a folder (the iPhone Backup) with various files without a suffix. I want to run a batch process over these files, which detects each file's file-type (with the help of the magic-file database ...
5
votes
2answers
907 views

More sophisticated file command for deep inspection?

Sometimes it seems that the standard file command (5.04 on my Ubuntu system) is not sophisticated enough (or I am just using it wrong, which could well be). For example when I run it on an .exe file, ...
2
votes
2answers
1k views

How to find human-readable information about file types recognized by `file`?

Searching, googling, I could not find any information about file types recognized by file. For example, an *.mp4 file is identified as "ISO Media" (while being able to play with VLC normally). This ...
6
votes
1answer
284 views

What could cause strange behavior in file(1) command?

What could cause file(1) command to output application/msword application/msword (yes, twice in a row) as the mime type for some of the .doc files? Normally it prints just application/msword. If run ...
2
votes
1answer
114 views

How can I create a file that just contains a binary number?

I would like to create a file that just contains a binary number. I think that touch can be used to create an empty file, but is there any way I can fill it with a binary number e.g. 10 (ten)? And how ...
4
votes
5answers
5k views

How to find image files by content

I have a list of files and I need to find all the image-files from that list. For example, if my list contained the following: pidgin.tar.gz photo01.jpg picture01 screenshot.gif invoice.pdf Then I ...