ISO Master is a free graphical ISO image editor for Linux and it is used to create and customize CD/DVD iso images. using this software you can also make bootable CDs/DVDs. It supports .ISO files (ISO9660, Joliet, RockRidge, and El Torito), most .NRG files, and some single track .MDF files but you can save the output only as .ISO file.
Install ISO master on Ubuntu
To install ISO master on Ubuntu, Open your terminal application (ctrl+alt+t) and run below command. It will install the latest version of ISO Master on Ubuntu.
sudo apt install isomaster
After the successful installation of ISO Master, click the Show Apps button on your Ubuntu dock and type ISO Master in the search field.Then click ISo master to open it. You can also open it using below command.