With the command line option, you'll be presented with the location of the file. Then you'll need to open the associated application and open the file via the application's File > Open menu.

Use the basic tail command to display the last 10 lines of a file. Tail the desired number of lines by specifying the -n option. Learn how to use the +N option to display lines starting from the Nth ...

There's a lot to learn about image files on the command line, from verifying file format to finding out where and when photos were taken and maybe even getting an unusual view of what they look like.

So, if you had a single-line file with no newline character at the end, it would tell you the file has 0 lines, The wc -l command can also count the lines in any text that is piped to it.