I was previously using Ubuntu 10.04 and I tried to install bitcoind. This failed and I upgraded to Ubuntu 12.04. When I run bitcoind it still doesn't work:

$ bitcoind    

************************

EXCEPTION: 11DbException       

Db::open: Invalid argument       

bitcoin in AppInit()       



terminate called after throwing an instance of 'DbException'

  what():  Db::open: Invalid argument

Aborted (core dumped)

Also, trying to re-install does not work:

$ sudo apt-get install bitcoind

Reading package lists... Done

Building dependency tree       

Reading state information... Done

The following NEW packages will be installed:

  bitcoind

0 upgraded, 1 newly installed, 0 to remove and 1 not upgraded.

Need to get 981 kB of archives.

After this operation, 2,873 kB of additional disk space will be used.

Get:1 http://ppa.launchpad.net/bitcoin/bitcoin/ubuntu/ precise/main bitcoind amd64 0.8.5-precise1 [981 kB]

Fetched 981 kB in 7s (130 kB/s)                                                                                               

(Reading database ... 222704 files and directories currently installed.)

Unpacking bitcoind (from .../bitcoind_0.8.5-precise1_amd64.deb) ...

dpkg: error processing /var/cache/apt/archives/bitcoind_0.8.5-precise1_amd64.deb (--unpack):

 trying to overwrite '/usr/bin/bitcoind', which is also in package bitcoin 0.3.24-ppa2~lucid

No apport report written because MaxReports is reached already

                                                              dpkg-deb: error: subprocess paste was killed by signal (Broken pipe)

Errors were encountered while processing:

 /var/cache/apt/archives/bitcoind_0.8.5-precise1_amd64.deb

E: Sub-process /usr/bin/dpkg returned an error code (1)

How can I get bitcoind working? I don't mind un-installing and re-installing if that is what it takes.

update 1

I just tried removing the package and installing again, but still no luck:

$ sudo apt-get remove --purge bitcoind

Reading package lists... Done

Building dependency tree       

Reading state information... Done

Package bitcoind is not installed, so not removed

0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.



$ sudo apt-get install bitcoind

Reading package lists... Done

Building dependency tree       

Reading state information... Done

The following NEW packages will be installed:

  bitcoind

0 upgraded, 1 newly installed, 0 to remove and 1 not upgraded.

Need to get 981 kB of archives.

After this operation, 2,873 kB of additional disk space will be used.

Get:1 http://ppa.launchpad.net/bitcoin/bitcoin/ubuntu/ precise/main bitcoind amd64 0.8.5-precise1 [981 kB]

Fetched 981 kB in 7s (136 kB/s)                                                                                               

(Reading database ... 222704 files and directories currently installed.)

Unpacking bitcoind (from .../bitcoind_0.8.5-precise1_amd64.deb) ...

dpkg: error processing /var/cache/apt/archives/bitcoind_0.8.5-precise1_amd64.deb (--unpack):

 trying to overwrite '/usr/bin/bitcoind', which is also in package bitcoin 0.3.24-ppa2~lucid

dpkg-deb: error: subprocess paste was killed by signal (Broken pipe)

Errors were encountered while processing:

 /var/cache/apt/archives/bitcoind_0.8.5-precise1_amd64.deb

E: Sub-process /usr/bin/dpkg returned an error code (1)