[Qgis-user] How to update / Re-install QGis in Ubuntu.

[AJAY KUMAR MULAKALA]

I am unable to install Q-Gis in Ubuntu-13.04 

Ubuntu 13.04 having a default QGis-1.7 which was installed and working properly. 

But as I now tried to udate QGis-2.0 which couldn't installed and previous installed QGis-1.7 is damaged.

These are the errors I now got while updating QGis-2.0 after removal of QGis-1.7

Please suggest me how to install and to work with QGis-2.0.

with thanks and hope to get possible best solution at an earliest of time.

-- AJAY
---------------------- steps followed by me and errors incurred while installeing ------------------------------
$ sudo apt-get update
    Fetched 511 kB in 35s (14.6 kB/s)
    W: Failed to fetch http://ppa.launchpad.net/pitti/postgresql/ubuntu/dists/saucy/main/binary-i386/Packages  404  Not Found

    E: Some index files failed to download. They have been ignored, or old ones used instead.

$ sudo apt-get install qgis python-qgis
    Reading package lists... Done
    Building dependency tree 
    Reading state information... Done
    Some packages could not be installed. This may mean that you have
    requested an impossible situation or if you are using the unstable
    distribution that some required packages have not yet been created
    or been moved out of Incoming.
    The following information may help to resolve the situation:

    The following packages have unmet dependencies:
    python-qgis : Depends: python-qgis-common (= 2.0.1-2+precise1) but it is not going to be installed
Depends: libqgis2.0.1 but it is not going to be installed
Depends: sip-api-8.1 but it is not installable
    qgis : Depends: libgdal1-1.7.0 but it is not installable
     Depends: libqgis2.0.1 but it is not going to be installed
     Depends: qgis-providers (= 2.0.1-2+precise1) but it is not going to be installed
    Recommends: qgis-plugin-grass but it is not going to be installed
    Recommends: qgis-plugin-globe but it is not going to be installed
    W: Duplicate sources.list entry http://apt.postgresql.org/pub/repos/apt/ precise-pgdg/main i386 Packages (/var/lib/apt/lists/apt.postgresql.org_pub_repos_apt_dists_precise-pgdg_main_binary-i386_Packages)
    W: Duplicate sources.list entry http://apt.postgresql.org/pub/repos/apt/ precise-pgdg/main i386 Packages (/var/lib/apt/lists/apt.postgresql.org_pub_repos_apt_dists_precise-pgdg_main_binary-i386_Packages)
    W: Duplicate sources.list entry http://apt.postgresql.org/pub/repos/apt/ precise-pgdg/main i386 Packages (/var/lib/apt/lists/apt.postgresql.org_pub_repos_apt_dists_precise-pgdg_main_binary-i386_Packages)
    W: Duplicate sources.list entry http://qgis.org/debian/ precise/main i386 Packages (/var/lib/apt/lists/qgis.org_debian_dists_precise_main_binary-i386_Packages)
    W: Duplicate sources.list entry http://qgis.org/debian/ precise/main i386 Packages (/var/lib/apt/lists/qgis.org_debian_dists_precise_main_binary-i386_Packages)
    W: You may want to run apt-get update to correct these problems
    E: Unable to correct problems, you have held broken packages.

$ sudo apt-get install qgis python-qgis

>> sudo apt-get install qgis-plugin-grass
    Reading package lists... Done
    Building dependency tree 
    Reading state information... Done
    Some packages could not be installed. This may mean that you have
    requested an impossible situation or if you are using the unstable
    distribution that some required packages have not yet been created
    or been moved out of Incoming.
    The following information may help to resolve the situation:

    The following packages have unmet dependencies:
    qgis-plugin-grass : Depends: qgis (= 2.0.1-2+precise1) but it is not going to be installed
Depends: libgdal1-1.7.0 but it is not installable
Depends: libqgis2.0.1 but it is not going to be installed
Depends: grass641 but it is not installable
    E: Unable to correct problems, you have held broken packages.
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