How to create various Linux filesystems (change /dev/hda1 below to your partition):

EXT2: mkfs.ext2 /dev/hda1

EXT3: mkfs.ext3 /dev/hda1

JFS: mkfs.jfs /dev/hda1

ResierFS: mkreiserfs /dev/hda1

XFS: mkfs.xfs -f /dev/hda1