FG

modify 128 bytes

Fresh3 days ago
Mar 15, 2026488 views
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Problem

I have to replace on a Linux web server, the first 128 bytes of some binary files. The files have a size of ~ 5Gb and I just have to rewrite the header bytes. What would be the best approach to do this using Linux native commands or even PHP?

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Fix for: modify 128 bytes

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The is a simple approach. So this will take the first 128 bytes of a file called and overwrite the first 128 bytes of a file called . The parameter says to copy 128 bytes at a time, and the parameter says to copy one such 128 byte block. The paramet…

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