The ia32-libs package is necessary to run Gblocks on a x86_64 operating system. This should be covered if you start a server from scratch with these instructions. If you are installing on another Ubuntu server, do this:

% sudo apt-get -y install lib32-libs

After looking, Gblocks source code is not available but a Linux executable is available from the web site. Here is the procedure to install GBlocks in Impilo:

• The archive with the executable is downloaded from the web in /home/bioubuntu, decompressed and the new folder moved in /opt/bio/sources.

• This folder should belong to root and its permissions should be set to 755.

% sudo chown -R root:root /opt/bio/sources/Gblocks_0.91b
% sudo chmod -R 755 /opt/bio/sources/Gblocks_0.91b

• Once you are in /opt/bio/sources/Gblocks_0.91b, simply create a symbolic link from the executable toward a location found in $PATH:

% sudo ln -s /opt/bio/sources/Gblocks_0.91b/Gblocks /usr/local/bin/gblocks