Reference

bzip2recover(1) on Linux

The text 6ba01fb90616, as Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy) shipped it.

a block-sorting file compressor, v1.0.6 bzcat - decompresses files to stdout bzip2recover - recovers data from damaged bzip2 files

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bzip2recover(1) on Linux now