how to backup iso using cli

Step	Linux/macOS	Windows
Insert SD Card	Insert the Raspberry Pi SD card into your computer.	Insert the Raspberry Pi SD card into your computer.
Identify SD Card	Use diskutil list (macOS) or lsblk (Linux) to find the device identifier (e.g., /dev/sdb).	Skip to the next step as Win32 Disk Imager handles this.
Create Backup	Run: sudo dd if=/dev/sdX of=~/raspberry_pi_backup.iso bs=4M (replace /dev/sdX with the correct device identifier).	Use Win32 Disk Imager: Select the SD card, choose a save location, and click "Read" to create the backup.
Verify Backup	Check the size of the ISO file and optionally mount it to verify the contents.	Check the size of the ISO file and optionally mount it to verify the contents.
Restore (Optional)	To restore, run: sudo dd if=~/raspberry_pi_backup.iso of=/dev/sdX bs=4M.	Use Win32 Disk Imager: Select the ISO file and write it to the SD card.
Notes	The dd command is powerful, so double-check device identifiers to avoid mistakes. Ensure you have enough storage space for the .iso file.	The .iso file will be the size of the SD card, so make sure you have enough storage space.