utilities - See the header position of a BIG file -

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sometimes, got big file, don't know file type. need use tool peek first bytes of file find out file type.

but file big normal text editor, have wait long time!

p.s. need tools, not code.

the tools on reasonable *nix box are:

  • file: knows lot of magic headers , detects type of file.
  • head: reads first several lines or bytes of file.
  • tail: reads last several bytes or lines of file; files have metainfo @ end.

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