install a software like postgresql in ubuntu

Bijit follow these steps :

$ cd <to the location where you have downloaded your file>

$ sudo chmod 777 postgresql-8.3.5-1-linux-x64.bin

$ sudo ./postgresql-8.3.5-1-linux-x64.bin

[that is sudo [dot][slash] ==>"./"]

Done thats it :)

Please tell....

There is a good reason to install postgresql from downloaded files instead to use the repository ready made packages...?

Thank you

Thank you Hemanth for your response.
But I am still having some problem during installaton.I have performed the following steps.
First I copy the file in my desktop.Then

bijit@ubuntu:~$ cd /home/bijit/Desktop
bijit@ubuntu:~/Desktop$ sudo chmod 777 postgresql-8.3.5-1-linux-x64.bin
[sudo] password for bijit:
bijit@ubuntu:~/Desktop$ sudo ./postgresql-8.3.5-1-linux-x64.bin
./postgresql-8.3.5-1-linux-x64.bin: 3: Syntax error: ")" unexpected

How can I solve it.

The preferred method to install software in Ubuntu is via its integrated package manager. The package for PostgreSQL is called "postgresql-8.3".

You can install it either via Synaptic[1] or on the command line with the command
    apt-get install postgresql-8.3

Most of the time this is easier than installing the software manually.

Regards,
Ansgar

[1] https://help.ubuntu.com/community/SynapticHowto

$ sudo gedit postgresql-8.3.5-1-linux-x64.bin

{this opens a file}

You can just edit the small script and change the offending "sh" to "bash".