![]() To check the existing partitions, enter fdisk -l MAKE SURE THAT YOU’RE RUNNING AS A ROOT OR A SUPER USER. How to make ext4 in Debian, Ubuntu and CentOS, RHEL(6.4 & above), Fedora, etc The ext4 code has the ability to mount and use a filesystem without a journal. However, a filesystem with ext4-specific extensions can not be mounted using ext2 or ext3, and the ext3 file systems code in the kernel requires the presence of a journal, which is generally not present in partitions formatted for use by the ext2 file system. For example, a filesystem which is created for use with ext3 can be mounted using either ext2 or ext4. This way of looking at things is supported by the fact that they share the same userspace utilities (e2fsprogs), and that many filesystems can be mounted on different filesystems. ![]() ![]() In fact, they can be considered a single filesytem format with a number of feature extensions, and ext2, ext3, and ext4 are merely the names of the implementations found in the Linux kernel. The ext2, ext3, and ext4 file systems are a family of file systems that have a strong amount of backwards and forward compatibility. The ext4 or fourth extended filesystem is a journaling file system for Linux, developed as the successor to ext3.
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