dd if=ZKAccess53_v3.2.1.bin of=header.bin bs=64 count=1 cat header.bin lzma_kernel.bin new_squashfs.bin > ZKAccess53_repacked.bin

Add employee names and assign them to Access Levels (which doors they can open and when).

The official installer might require separate downloads for the database engine (SQL Server or MySQL), the communication server, and the UI. A repack bundles everything into one .exe file.

Pro Tip: If you are in a regulated industry (finance, healthcare, government), always obtain official installers from your ZKTeco distributor and apply the repack principles manually rather than using a pre-packaged third-party file.