Softwares and lib files

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http://askubuntu.com – I have been using suse until now. I am trying to learn ubuntu and I need to install some packages and library files but I could not find some (maybe due to they are named different from suse). For example typing apt-cache compat gives no results and also glibc, cross and needed 32-bit libraries. Is there any way to see packages and library lists on ubuntu like opensuse? (HowTos)