How to install sudo package in unix?

view story

http://unix.stackexchange.com – I'm new to this sudo command. I needed to do "sudo mount -o remount". But it is giving message says "sudo: unable to stat /etc/sudoers: No such file or directory sudo: no valid sudoers sources found, quitting sudo: unable to initialize policy plugin" So I assume, it is not installed on my server. Could anyone give instruction how to properly install sudo package on my server. I followed this tutorial http://www.linuxfromscratch.org/blfs/view/svn/postlfs/sudo.html. But I am not able to login as a root and run command make install. Thank you! My Actual problem is: I need to access /usr/share/ (HowTos)