$ mkdir ncbi
$ cd ncbi
$ git clone https://github.com/ncbi/ngs-tools.git
$ git clone https://github.com/ncbi/ncbi-vdb.git
and follow directions at [https://github.com/ncbi/ncbi-vdb/wiki/Building-and-Installing-from-Source] (https://github.com/ncbi/ncbi-vdb/wiki/Building-and-Installing-from-Source) .
$ cd ngs-tools
$ ./configure
By default, configure will select a build-output directory under your $HOME
and will install under /usr/local/ncbi/ngs-tools
on Linux.
The default settings can be changed, of course. For all options, you can run:
$ ./configure --help
$ make
$ sudo make install
At this point, the installation should be complete, although you will probably have to login again before all changes take place. If the installation is successful, you should find executables installed and an update to shell variables (only AFTER logging in again). To verify update of your environment:
$ echo $PATH
# should now have the path to your installed ngs-tools, and
$ which sra-search
# should return the location of this utility.