February 2026
Intermediate to advanced
456 pages
17h 3m
English
Content preview from Digital Forensics, Investigation, and Response 5E, 5th Edition
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Tmpfs
Tmpfs (temporary file system) is a Linux file system whose contents reside only in memory. This means that files and directories inside of tmpfs mounts are never written to the local disk, so that once a tmpfs mount is unmounted, the entire file system is wiped. The data being wiped may have interesting data if you can capture it before the system is shut down.
On some Linux distributions, the /tmp is mounted directly as tmpfs, so only by capturing tmpfs will you be able to get what was in /tmp. Linux also uses tmpfs to implement shared memory through /dev/shm. More sophisticated attackers can use tmpfs to download mali-cious files and use tmpfs as a staging area.
You can find out more about tmpfs at:
https://www.kernel.org/doc/html/latest/filesystems/tmpfs.html ...
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