2 Ways to Create an ISO from a Bootable USB in Linux
In this article, we will show you how to create an ISO from a bootable USB drive in Linux. We will explain two ways to achieve this: via the command line interface (CLI) and a graphical user interface (GUI) program.
Create An ISO From A Bootable USB Drive Using dd Tool
dd is a commonly used command-line tool for Linux and other Unix-like operating systems, used to convert and copy files.
To create an ISO image from a Bootable USB Drive files, first you need to insert your USB drive and then find the device name of your USB using following df command.
$ df -hT
Filesystem Type Size Used Avail Use% Mounted on udev devtmpfs 3.9G 0 3.9G 0% /dev tmpfs tmpfs 787M 1.5M 786M 1% /run /dev/sda3 ext4 147G 28G 112G 20% / tmpfs tmpfs 3.9G 148M 3.7G 4% /dev/shm tmpfs tmpfs 5.0M 4.0K 5.0M 1% /run/lock tmpfs tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup /dev/sda1 vfat 299M 11M 288M 4% /boot/efi tmpfs tmpfs 787M 56K 787M 1% /run/user/1000 /dev/sda5 ext4 379G 117G 242G 33% /media/tecmint/Data_Storage
/dev/sdb1iso9660 1.8G 1.8G 0 100% /media/tecmint/Linux Mint 19 Xfce 64-bit
From the output above, you can clearly see that our attached USB device name is
/dev/sdb1with your USB drive and
/home/tecmint/Documents/Linux_Mint_19_XFCE.isowith the full name of the new ISO image.
$ sudo dd if=/dev/sdb1 of=/home/tecmint/Documents/Linux_Mint_19_XFCE.iso
In the above command, the option:
- if – means read from specified FILE instead of stdin.
- of – means write to specified FILE instead of stdout.
Once done, you can verify the ISO image using following ls command as shown.
$ ls -l /home/tecmint/Documents/Linux_Mint_19_XFCE.iso
Create An ISO From A Bootable USB Drive Using Gnome Disks
Gnome Disks is a graphical tool used to manage disk drives and media in Linux. It is used to format and partition drives, mount and unmount partitions, and query S.M.A.R.T. (Self-Monitoring Analysis and Reporting Technology) attributes.
If you don’t have gnome-disk utility on your system, you can install it by running the following command.
$ sudo apt install gnome-disk-utility #Ubuntu/Debian $ sudo yum install gnome-disk-utility #CentOS/RHEL $ sudo dnf install gnome-disk-utility #Fedora 22+
After successfully installing Gnome disk, search and open it from the system menu or dash. Then from the default interface, select the bootable device from the list of mounted devices on the left-hand pane, by clicking on it and click on disk options. Then click on Create Disk Image option as shown in the following image.
From the dialog window, set the name of the ISO file, its location and click Start creating. Then enter your password to open the bootable device and the process should start if the authentication is successful.
That’s it for now! In this article, we’ve explained two ways to create an ISO from a bootable USB drive in Linux.