A Journaling File System is a type of file system that keeps track of changes in a journal before applying them to the main file system. This journal records metadata about pending changes, which helps protect data integrity in the event of a system crash or power failure. If the system crashes, the file system can use the journal to recover and complete any unfinished operations, reducing the risk of corruption. Common journaling file systems in Linux include ext4, XFS, and Btrfs. Journaling adds a layer of reliability and is particularly important for systems that require high availability and data consistency.
