in reply to Re^2: concatenate/stitch multiple GZip fastq files and output combined gzip file
in thread concatenate/stitch multiple GZip fastq files and output combined gzip file

Or, you could just cat the compressed files together. Says gunzip

Multiple compressed files can be concatenated. In this case, gunzip will extract all members at once.
... and conversely, for gzip -c
If there are several input files, the output consists of a sequence of independently compressed members. To obtain better compression, concatenate all input files before compressing them.

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