Notable reference site: Linux LEO, The Law Enforcement and Forensic Examiner’s Introduction to Linux. Please note, the guide has just received its first update in over a year. Updates should be coming more regularly, according to the guide’s author. Stay tuned for more to come!
Test data is available GPT Partition Image (gptimage.raw.gz), Fat File System Image (fat_fs.raw), “Able2” Ext2 Disk Image , able2.tar.gz), “Able3” Ext4 Disk Image (able_3.tar.gz), Practice Log Archive (logs.v3.tar.gz), Carve Image (image_carve_2017.raw), and NTFS Image (ntfs_Pract_2017_E01.tar.gz).
For information on file signature analysis (OS agnostic and file-type specific), please check out Gary Kessler’s File Signature Table.