View all of a digital photo’s technical information

Most pictures taken by digital cameras are saved in EXIF JPEG format.
This means that they record technical details about the shot along with
the actual image data. The information includes the exposure time, the
aperture used, whether the flash was active, and so on.
In Ubuntu you can view this information by right-clicking any image,
clicking Properties, and then looking at the Image tab. To view even more
information, double-click the image so it opens in Eye of GNOME (the
default Ubuntu image viewer) and then click File → Properties. Then
click the Metadata tab and click the Details fold-down. Remember that
even dialog boxes within Ubuntu can be enlarged by clicking and drag-
ging the corners—this can really help view all the available information.
To view the information at the command-line, use Synaptic to install
the exif package. Then, to view the EXIF information, simply type exif
photo.jpg, replacing photo.jpg with the name of the file.