Removing password from password protected pdf file

[Patton Echols]

On 02/04/2010 07:51 AM, Peng Yu wrote:
> There are a couple of password removing software for pdf on windows.
> I'm wondering if there is such a software in ubuntu or, more broadly,
> in linux. Could somebody share with me if you know it?
>   
Do you know the password and want to disable it?  Try pdftk  It is  CLI 
program in the repositories.  You will need to read the man page after 
install.  But it is fairly straightforward.

If you are looking for a method to discover or crack an unknown 
password, I don't know of any but someone else might.

--PE