上一篇博文中写到出了这个小工具，现在更新到0.2.4了，新增了一些子命令。有seqtk，seqkit等好用的工具珠玉在前，还写这个主要是学习和熟悉rust这门语言的基础语法了，写出来自己玩儿咯。
reop:
https://github.com/sharkLoc/fakit
install:
cargo install fakit
usage:
fakit: a simple program for fasta file manipulation
Usage: fakit <COMMAND>
Commands:
topn
get first N records from fasta file
fa2fq
convert fasta to fastq file
faidx
crate index and random access to fasta files
relen
re-length fasta sequence
rename
rename sequence id in fasta file
window
stat dna fasta gc content by sliding windows
search
search subsequences/motifs from fasta file
subfa
subsample sequences from big fasta file
split
split fasta file by sequence id
summ
a simple summary for DNA fasta files
help
Print this message or the help of the given subcommand(s)
Options:
-h, --help
Print help
-V, --version
Print version