001、
[b20223040323@admin1 test]$ ls
test.fa
[b20223040323@admin1 test]$ cat test.fa ## 测试数据
>chr1
aabbccdd
eeff
>chr2
xxyyzzqq
gg
>chr3
ddjjiill
ssff ## 转换程序
[b20223040323@admin1 test]$ awk '{if(NR == 1) {print $0} else if($0 ~ />/) {printf("\n"); print $0} else {printf("%s", $0)}} END {printf("\n")}' test.fa
>chr1
aabbccddeeff
>chr2
xxyyzzqqgg
>chr3
ddjjiillssff
标签：scaffold,linux,admin1,fa,awk,b20223040323,printf,test From： https://www.cnblogs.com/liujiaxin2018/p/17143129.html