get random subset

Randomly subsampling

subsampling of metagenomes to achieve equal coverage

# Subsampling 10000 read pairs from two paired FASTQ files

seqtk sample -s100 read1.fastq 10000 > sub1.fastq

seqtk sample -s100 read2.fastq 10000 > sub2.fastq

https://github.com/lh3/seqtk