zcmp

Compare compressed files

$ zcmp [file1.gz] [file2.gz]

$ zcmp -l [file1.gz] [file2.gz]

$ zcmp -s [file1.gz] [file2.gz]

zcmp [-l] [-s] file1 file2

zcmp compares gzip-compressed files byte-by-byte without requiring manual decompression. It works like cmp but transparently handles .gz files, decompressing them on the fly for comparison.
By default, zcmp reports only the first difference found. The -l flag shows all differing byte positions and values. Silent mode (-s) suppresses all output and communicates only through exit codes: 0 if files are identical, 1 if they differ.
The command is part of the gzip package and acts as a convenience wrapper. For line-by-line comparison of compressed files, use zdiff instead.

-l

Show byte positions.

Silent, exit code only.

Skip bytes.

Gzip format. For .gz files. Part of gzip package.

zcmp is part of the gzip package, providing cmp-like functionality for compressed files.

cmp(1), zdiff(1), zcat(1)