dd
dd is a Linux command in the Disk & Storage category, rated intermediate difficulty. Low-level data copy and conversion utility. Can clone drives or create bootable USBs. The syntax is dd [options]. Key options and parameters: if= — input file, of= — output file. It returns none (data copied). A practical example: dd if=/dev/sda of=backup.img bs=4M # Clone disk dd if=ubuntu.iso of=/dev/sdb bs=4M # Create bootable USB dd if=/dev/random of=file count=100 # Create file with random data A close relative is mount, which mounts a filesystem to make it accessible at a directory. A close relative is umount, which unmounts a mounted filesystem. A close relative is fdisk, which manages disk partition tables (create, delete, resize partitions). More about this category: Linux disk and storage commands — mount, umount, fdisk, lsblk, and more. Manage disks, partitions, and filesystems. Related Disk & Storage commands: mount, umount, fdisk, blkid, lsblk, parted, mkfs, fsck.