网页为：aspera
wget -c https://download.asperasoft.com/download/sw/connect/3.8.1/ibm-aspera-connect-3.8.1.161274-linux-g2.12-64.tar.gz
tar zxvf ibm-aspera-connect-3.8.1.161274-linux-g2.12-64.tar.gz
bash ibm-aspera-connect-3.8.1.161274-linux-g2.12-64.sh
# 有如下所示内容生成
Installing IBM Aspera Connect
Deploying IBM Aspera Connect (/home/qmcui/.aspera/connect) for the current user only.
Unable to update desktop database, IBM Aspera Connect may not be able to auto-launch
Install complete.
cd /home/qmcui/.aspera/connect/bin
./ascp --help
# 结果如下图所示
# 永久添加环境变量
echo 'export PATH=~/.aspera/connect/bin:$PATH' >> ~/.bashrc
# 最好写绝对路径：echo 'export PATH=/home/qmcui/.aspera/connect/bin:$PATH' >> ~/.bashrc
source ~/.bashrc
# 查看帮助文档
ascp --help
帮助文档调用成功即安装成功，再用prefetch下载数据的时候，就不会调
aspera调用成功
用https:
2018-11-14T08:20:44 prefetch.2.9.1: 1) Downloading 'SRR5398807'...
2018-11-14T08:20:44 prefetch.2.9.1: Downloading via fasp...
而是使用fasp
下载数据
先找到GSE号或者SRP号，找到accession list；下载，然后存到服务器上
source activate wes
# conda install sra-tools
prefetch SRR5398853
# 默认下载到了家目录下的ncbi路径下
prefetch SRR5398853 -o ~/SRR5398853.sra
# 指定路径制定名
prefetch SRR5398853 -O ~/
# 指定路径，适合于循环下载，不用截取id名来存取
cat prefetch.list |while read id;do prefetch $id -O ~/;done
# 如果不指定路径，默认在家目录下有一个ncbi的文件夹内
