Let's say we have a file named example.iso at /home/user1, and we want to view the contents of the iso. Let's create a directory to mount the iso.
[root@server1 ]# mkdir test
Let's mount the example.iso file.
[root@server1 ]# mount -o loop example.iso test
We can now list the contents of the test directory, to see the files contained in the .iso.
[root@server1 ]# ls test file1 file2 file3