XFS is a journaled filesystem originally developed by Silicon Graphics in 1993; it was released under the GPL license in the year 2000 and ported to the Linux kernel in 2001. Due to its high scalability and performances, XFS became the default filesystem in recent versions of Red Hat Enterprise Linux and its clones.
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How to create incremental and differential backups with tar
Tar (Tape ARchiver) is one the most useful utilities in the toolbox of every Linux system administrator out there. With tar we can create archives which can be used for various purposes: to package applications source code, for example, or to create and store data backups.