How to open ISO image without burning to disc in Linux
You can export the content of optical discs such as CD, DVD, or Blu-ray Disc into an image file for archival purposes. The file typically uses .iso or .img extension and is of ISO 9660 filesystem format.
You can view and copy the content of an ISO image without burning it to an optical disc by mounting the image file to a directory. You can do this from the terminal in Linux.
Steps to extract ISO image file without burning to disc in Linux:
Create a temporary directory to mount the ISO image file.
$ mkdir temp
Check if the ISO image file is of the correct format.
$ file ubuntu-19.10-live-server-amd64.iso ubuntu-19.10-live-server-amd64.iso: DOS/MBR boot sector; partition 2 : ID=0xef, start-CHS (0x3ff,254,63), end-CHS (0x3ff,254,63), startsector 1391610, 7936 sectors
Mount the ISO image file to the temporary folder using the iso9660 filesystem type.
$ sudo mount -t iso9660 ubuntu-19.10-live-server-amd64.iso temp/ [sudo] password for user: mount: /home/user/temp: WARNING: device write-protected, mounted read-only.
The ISO image is mounted as read-only, thus the content could only be viewed or copied over to different location.
Check content of ISO image file.
$ ls -l temp/ total 76 dr-xr-xr-x 1 root root 2048 Oct 17 13:33 boot dr-xr-xr-x 1 root root 2048 Oct 17 13:34 casper dr-xr-xr-x 1 root root 2048 Oct 17 13:33 dists dr-xr-xr-x 1 root root 2048 Oct 17 13:33 EFI dr-xr-xr-x 1 root root 2048 Oct 17 13:33 install dr-xr-xr-x 1 root root 34816 Oct 17 13:33 isolinux -r--r--r-- 1 root root 25363 Oct 17 13:34 md5sum.txt dr-xr-xr-x 1 root root 2048 Oct 17 13:33 pics dr-xr-xr-x 1 root root 2048 Oct 17 13:33 pool dr-xr-xr-x 1 root root 2048 Oct 17 13:33 preseed -r--r--r-- 1 root root 232 Oct 17 13:33 README.diskdefines lr-xr-xr-x 1 root root 1 Oct 17 13:33 ubuntu -> .
Copy or view content of ISO image file.
$ head temp/dists/stable/Release Origin: Ubuntu Label: Ubuntu Suite: eoan Version: 19.10 Codename: eoan Date: Thu, 17 Oct 2019 12:37:49 UTC Architectures: amd64 i386 Components: main restricted Description: Ubuntu Eoan 19.10 Acquire-By-Hash: yes
Exit from the mount directory.
Unmount the ISO file from the mount directory.
$ sudo umount temp/
Remove the temporary mount directory.
$ rmdir temp/