Split
From BITS wiki
The split command splits up text files.
E.g. split a fastQ file into smaller blocks.
zcat mybig.fastq.gz | split -d -a 2 -l 4000000 - mypart-
- -d numerical suffices (default is letters)
- -a two digit numerical suffices
- -l the number of lines
- mypart- gives the base-name for the produced bins