This page is for source code download, and you are supposedly using Ubuntu (newer than 12.04) or CentOS (newer 7)as your host OS.
Please execute the following command to update.
For Ubuntu system:

$ sudo apt-get update; sudo apt-get upgrade -y; sudo apt-get install -y wget git

For CentOS system:

$ sudo yum update -y; sudo yum install -y wget git

Automated Download

$ mkdir -p ~/bin
$ wget -c http://download.open-estuary.org/AllDownloads/DownloadsEstuary/utils/repo -O ~/bin/repo
$ chmod a+x ~/bin/repo; echo 'export PATH=~/bin:$PATH' >> ~/.bashrc; export PATH=~/bin:$PATH
$ mkdir -p ~/open-estuary; cd ~/open-estuary

All above steps are only necessary for first downloading, you can just do following steps if you are updating the latest version.

$ repo forall -c git reset --hard
$ repo forall -c git clean -dxf
$ repo init -u "https://github.com/open-estuary/estuary.git" -b master --no-repo-verify --repo-url=git://android.git.linaro.org/tools/repo
$ false; while [ $? -ne 0 ]; do repo sync; done

Above commands are for current latest repositories, If the repo prompts errors or the version is too old, please execute the following command to fetch newest repo source:

$ wget http://download.open-estuary.org/AllDownloads/DownloadsEstuary/utils/repo -O ~/bin/repo

For a special version, you can change ‘master’ to any specified version name, e.g.: ‘refs/tags/<version name>’, to download a special version as follows, you can get all version name list from Estuary News:

$ repo forall -c git reset --hard
$ repo forall -c git clean -dxf
$ repo init -u "https://github.com/open-estuary/estuary.git" -b refs/tags/v3.1 --no-repo-verify --repo-url=git://android.git.linaro.org/tools/repo
$ false; while [ $? -ne 0 ]; do repo sync; done

If the repo sync fails during repo syncing, you can just try it again.

Manual Download

Main Repo           : git clone https://github.com/open-estuary/estuary.git
UEFI for D05        : git clone https://github.com/open-estuary/uefi.git -b master
UEFI for D03        : git clone https://github.com/open-estuary/uefi.git -b master
grub                : git clone git://git.savannah.gnu.org/grub.git 
Linux Kernel        : git clone https://github.com/open-estuary/kernel.git 
QEMU                : git clone git://git.qemu-project.org/qemu.git 
Caliper             : git clone https://github.com/open-estuary/caliper.git
Armor               : git clone https://github.com/open-estuary/armor.git
Packages            : git clone https://github.com/open-estuary/packages.git
Tools               : git clone https://github.com/open-estuary/tools.git

More detail information about system setup, please refer to Estuary User Manual.
Overview introduction to this project, please refer to Estuary Overview.