Monthly Archives: April 2010


installing ubuntu-restricted-extras under wubi


From: Jose B 28 April at 01:49

When installing Linux on your Windows machine using Wubi, your Linux installation will not have access through the synaptic package manager to the Ubuntu Restricted Extras; also you will not be able to install them through the web page either.

What I did to get around this is:

1. I opened the terminal (Applications-Accessories-Terminal)
2. At the prompt type: $ sudo aptget ubuntu-restricted-extras
– This will install the restricted extras packages
3. type: sudo /usr/share/doc/libdvdread4/
– This will install dvd support to your linux system that was installed through Wubi

Now you will have a fully functional Linux system. This was tried on a Windows 7 machine.


How to do Certificate Based ssh Authentication



How to do — Certificate Based Authentication

1. Go into .ssh directory

cd ~/.ssh

3. now do:


return on all of the prompts (i.e. take all the defaults)

It will look like this:

Generating public/private rsa key pair.
Enter file in which to save the key (/home/bart/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/bart/.ssh/id_rsa.
Your public key has been saved in /home/bart/.ssh/
The key fingerprint is:
12:34:56 and so on.
The key’s randomart image is:
+–[ RSA 2048]—-+

4. Enter the following to copy the certificate to the machine:

ssh-copy-id -i ~/.ssh/ dohnuts

You will get output that looks like:

:~/.ssh$ ssh-copy-id -i ~/.ssh/ simpsons
The authenticity of host ‘[]:12345 ([]:12345)’ can’t be established.
RSA key fingerprint is ab:59:27:8a.

Are you sure you want to continue connecting (yes/no)? Yes
Warning: Permanently added ‘[]:12345,[]:12345’ (RSA) to the list of known hosts.

Now try logging into the machine, with “ssh ‘dohnuts'”, and check in:


to make sure we haven’t added extra keys that you weren’t expecting.

5. Now login, using your password to complete.

6. in the future you would type:

ssh dohnuts

Look Ma, no password!