Some popular Linux distributions that provide ISO images include:
You cannot simply copy and paste the .iso file onto a USB drive and expect it to work. You must "burn" or "flash" the image. This extracts the contents and writes the boot sector to the drive. linux iso image
When you download a Linux ISO, you aren't just downloading software; you are downloading a complete environment. This includes the Linux kernel, the desktop interface, pre-installed applications, and the installation wizard. Because the file is an "image," it preserves the exact structure and file attributes necessary to make a drive bootable. Some popular Linux distributions that provide ISO images