pritesh@pritesh-laptop:/etc/postgresql/8.3/main$ sudo apt-get install postgresql 
sudo: cannot get working directory
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  gcj-4.3-base libgcj9-0 postgis libwxgtk2.8-0 proj libgeos-3.0.0
  libossp-uuid15 libgcj-common libwxbase2.8-0 libgeos-c1 libgcj9-jar
  libruby1.8
Use 'apt-get autoremove' to remove them.
The following extra packages will be installed:
  postgresql-8.3 postgresql-client-8.3 postgresql-client-common
  postgresql-common
Suggested packages:
  oidentd ident-server postgresql-doc-8.3
The following NEW packages will be installed:
  postgresql postgresql-8.3 postgresql-client-8.3 postgresql-client-common
  postgresql-common
0 upgraded, 5 newly installed, 0 to remove and 350 not upgraded.
Need to get 0B/4778kB of archives.
After this operation, 20.0MB of additional disk space will be used.
Do you want to continue [Y/n]? y
Preconfiguring packages ...
shell-init: error retrieving current directory: getcwd: cannot access parent directories: No such file or directory
Selecting previously deselected package postgresql-client-common.
(Reading database ... 123663 files and directories currently installed.)
Unpacking postgresql-client-common (from .../postgresql-client-common_90_all.deb) ...
Selecting previously deselected package postgresql-client-8.3.
Unpacking postgresql-client-8.3 (from .../postgresql-client-8.3_8.3.9-0ubuntu8.10_i386.deb) ...
Selecting previously deselected package postgresql-common.
Unpacking postgresql-common (from .../postgresql-common_90_all.deb) ...
Selecting previously deselected package postgresql-8.3.
Unpacking postgresql-8.3 (from .../postgresql-8.3_8.3.9-0ubuntu8.10_i386.deb) ...
Selecting previously deselected package postgresql.
Unpacking postgresql (from .../postgresql_8.3.9-0ubuntu8.10_all.deb) ...
Processing triggers for man-db ...
Setting up postgresql-client-common (90) ...
Setting up postgresql-client-8.3 (8.3.9-0ubuntu8.10) ...

Setting up postgresql-common (90) ...
supported_versions: WARNING: Unknown Ubuntu release: 8.10

Setting up postgresql-8.3 (8.3.9-0ubuntu8.10) ...
Creating new cluster (configuration: /etc/postgresql/8.3/main, data: /var/lib/postgresql/8.3/main)...
Moving configuration file /var/lib/postgresql/8.3/main/postgresql.conf to /etc/postgresql/8.3/main...
Moving configuration file /var/lib/postgresql/8.3/main/pg_hba.conf to /etc/postgresql/8.3/main...
Moving configuration file /var/lib/postgresql/8.3/main/pg_ident.conf to /etc/postgresql/8.3/main...
Configuring postgresql.conf to use port 5432...
 * Starting PostgreSQL 8.3 database server                                       * Insecure directory in $ENV{PATH} while running with -T switch at /usr/share/postgresql-common/PgCommon.pm line 654.
                                                                         [fail]
invoke-rc.d: initscript postgresql-8.3, action "start" failed.
dpkg: error processing postgresql-8.3 (--configure):
 subprocess post-installation script returned error exit status 255
dpkg: dependency problems prevent configuration of postgresql:
 postgresql depends on postgresql-8.3; however:
  Package postgresql-8.3 is not configured yet.
dpkg: error processing postgresql (--configure):
 dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup error from a previous failure.
                          Errors were encountered while processing:
 postgresql-8.3
 postgresql
E: Sub-process /usr/bin/dpkg returned an error code (1)