Install ascp on Linux

install-ascp.sh

#!/bin/bash

## How to install ascp, in a gist.

## Check for latest link: http://downloads.asperasoft.com/en/downloads/8?list
wget -qO- https://download.asperasoft.com/download/sw/connect/3.9.8/ibm-aspera-connect-3.9.8.176272-linux-g2.12-64.tar.gz | tar xvz

## run it
chmod +x ibm-aspera-connect-3.9.8.176272-linux-g2.12-64.sh
./ibm-aspera-connect-3.9.8.176272-linux-g2.12-64.sh

## add it to the path now and in the future
export PATH=$PATH:~/.aspera/connect/bin/
echo 'export PATH=$PATH:~/.aspera/connect/bin/' >> ~/.bash_profile

util_functions.sh

#!/bin/bash

## Some helper functions to put in .bash_profile

# download SRR from NCBI SRA via Aspera Connect
# Usage:
#
# $ get-srr SRR304976
#
get-srr () {
    SRR=${1}
    SRR_6=$(echo $SRR | cut -c1-6)
    
    # Tune the ascp parameters for your bandwidth!
    ascp -i ~/.aspera/connect/etc/asperaweb_id_dsa.openssh \
	 -k 2 -T -l200m \
	 anonftp@ftp.ncbi.nlm.nih.gov:/sra/sra-instant/reads/ByRun/sra/SRR/${SRR_6}/${SRR}/${SRR}.sra \
	 .
}

# download all SRRs listed in a file
get-srr-all () {
    while read srr; do
	get-srr $srr
    done <${1}
}