resize2fs vs ext2online

Before RHEL5, there were two commands that could be used to resize ext2 or ext3 filesystems: resize2fs and ext2online.

resize2fs can be used to both grow or shrink a filesystem; however, the filesystem must be unmounted.

ext2online can be used only to grow a filesystem, but works on mounted filesystems.

As of RHEL5, online growing has been added to resize2fs and ext2online has been removed.

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