Saturday, April 22, 2017

Inspecting File Metadata using exiftool

Inspecting metadata of a file is a way to reveal so many interesting things about it. Specially, image files which are taken as pictures from cameras contains wonderful amount of information. There's a nice tool called exiftool which we can use for this purpose. I'll briefly write about how we can install it and use to inspect some files.

(1) In order to install exiftool, you can either use the package repositories or just download the source code of exiftool and build locally.

#To install using package repositories, issue to following command in the terminal.

sudo apt-get update
sudo apt-get install libimage-exiftool-perl 

#If you want to build exiftool from the source code, first you should download the code from the following place.

#Extract the downloaded compressed file and move into it.

tar xvzf Image-ExifTool-10.49.tar.gz Image-ExifTool-10.49/ 
cd Image-ExifTool-10.49/

#Compile and install the tool using the following commands.

perl Makefile.PL
make test
sudo make install

(2) It's time to inspect a file. Let's take a picture from a camera and then inspect it as follows.

exiftool file-name.jpg

The screen shot shown above illustrates the output of the exiftool ran against an image file.

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