accessing windows partition on ubuntu

Firstly, you need to check with all widnows disks are available to you using following commands

sudo fdisk -lu  

then mount using following

mkdir /media/windows  
sudo mount /dev/sda2 /media/windows  

Taking back up of PostgreSQL db and loading back up file

I am working with huge data set and its growing everyday. Fear of loosing data which you have gathered after so much efforts can give you sleepless nights. One of the way to tack care of this risk is by taking backup frequently, whenever you need reload the data, you can simply reload it.

Creating backup file
pg_dump dbname > outfile  
Loading from back up file
psql dbname < infile  

please note that dbname needs to be created prior to loading this backup file and it will not only create database in the same format but also it will load data.

Dealing with huge datasets

If your are dealing with huge databses you can takke dump in zip file

pg_dump dbname | gzip > filename.gz  

and load it as below

gunzip -c filename.gz | psql dbname  

or

cat filename.gz | gunzip | psql dbname  

alternatively you can split files if you are not comfortable with zip or have limitation of file size.

pg_dump dbname | split -b 1m - filename  

load with

cat filename* | psql dbname