you have got to be trolling...
ubuntu != linux
real linux users don't call the root account SU and don't rely on sudo.
download a linux distro, install it on your computer, try to get by day to day for a while, google is your friend, there are plenty of chatrooms on irc.freenode.net dedicated to specific distros for you to hang out in and learn from.
get used to working your way around the filesystem with bash or sh.
learn what an exe is and why it's only place in linux is with wine.
make sense of this command, every single character of it.
./configure --prefix=/usr && make mrproper && make && make install DESTDIR=/tmp/$pkgname
learn what the numbers in chmod 755 mean, what altering them does, and how they effect different targets.
and remember, i've said it before, i'll say it again to stress it. google is your friend.
practice your google-foo and it shall serve you well.
oh and the final thing. RTFM