I don't know the password required when sudo runs.

Environment
·Mac Terminal
·Linux Ubuntu

I am a beginner in Linux.
In order to translate the man command into Japanese, I executed the following command, but I was asked to password.I can't install it because I don't know the password, but what should I do in that case?
The command is set to

 sudo apt-get install manpages-ja manpages-ja-dev

Yes.
Reference Site
http://d.hatena.ne.jp/tettou77-2/20090323/1237833841

Thank you for your cooperation.