How do I extract files from ISO

I had created .iso file.  Then I wanted to check if a particular file is included in this image.

In the Windows world, a third party software is required to do this.  Linux has built-in support to do this.

I created a directory in which to mount the image.
mkdir /mnt/iso-check/

Then mount the .iso file.
mount -o loop  /disk1/iso/SONAS-1.6.0.0-29-1429.iso  /mnt/iso-check/

Now I could traverse to /mnt/iso-check/ and check that the required file is in there or not.

After I am done with whatever I was looking for, I unmounted the image.
umount /mnt/iso-check