I am using the wizard launch to install services of hadoop from ambari.
In the first service DataNode an error occurred when trying to install him
Failed to fetch http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu/dists/trusty/main/binary-i386/Packages 404 Not Found
@Anis Khadhri Can you make sure you have access to download packages and the repo is correct ?
Also I see the distro you are using is i386 which should not be the case. You must use 64-bit packages for OS too.
Can you please remove the ubuntu repositories from path for time being and try again.
Also can you list for the repositories which are in place? ie. /etc/apt/sources.list.d/
apt-cache showpkg <datanode_pkg_name>