Now that we have a blank partition, we can create a file system on it. Most widely used in the Linux world is the second extended file system (ext2), but with the high-capacity hard disks of today the so-called journaling file systems are becoming increasingly popular. Here we will create an ext2 file system, but build instructions for other file systems can be found at . To create an ext2 file system on the LFS partition run the following: mke2fs /dev/xxx Replace xxx with the name of the LFS partition (something like hda5). If you created a (new) swap partition you need to initialize it as a swap partition too (also known as formatting, like you did above with mke2fs) by running: mkswap /dev/yyy Replace yyy with the name of the swap partition.