Split Large Files With split
Break a big file into fixed-size parts and reassemble later.
Run split -b 100M -d big.iso part- to produce part-00, part-01 and so on.
01Command
Command
$ split -b 100M -d big.iso part-02What it does
split chops a file into numbered pieces that fit upload limits, email or removable media, and cat part-* rejoins them. It is deterministic and scriptable, which is why it remains common in backup and transfer workflows.
03Risk
!Warning: The original file is unchanged; verify the rejoined copy with a checksum before deleting the parts.
04Undo
✓No undo needed — this command does not change persistent state.
05Sources
- split.1.en.html manual page (Debian bookworm)Evidence: Documents split, including byte sizes and numeric suffixes.
Last verified: 2026-10-13 · Category: Files & Folders
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