TestOut Linux Pro Practice Test 2025 – Complete Exam Prep Guide

The command used to format a partition after creating it is `mkfs`. This command stands for "make filesystem" and is essential for preparing a partition on a disk to hold a filesystem. When you create a new partition using tools like `fdisk` or `parted`, it does not automatically format it; you must use `mkfs` to specify the filesystem type you want to use, such as ext4, NTFS, or others.

Once you execute `mkfs` followed by the appropriate options and the partition you want to format (for example, `mkfs.ext4 /dev/sdb1`), it initializes the partition with the filesystem, effectively allowing data to be stored on it.

The other commands listed serve different purposes: `fdisk` is primarily used for partitioning disks, `parted` is used for creating and managing partitions as well, and `resize2fs` is utilized for resizing ext2, ext3, or ext4 filesystems, not formatting them. Thus, `mkfs` is the correct command for the task of formatting.