I've got realy huge problem. I left my home for winter break and I installed ubuntu on pen drive. I tried to compile any program in geany or using terminal, but geany says there is no g++ and same in terminal. I borrowed a modem for a time I'll spend here and here comes main problem. I can only use it on windows, because I don't know user or password to connect and windows doesn't require it to connect, but on ubuntu it asks for a user etc. It wouldn't be a problem if I could download .deb package and install it on ubuntu. But I can't, because when I try to install it, it says that I have to install it from a trusted source or something ( I don't remember exactly). So, is there any possible way to install missing programs? Because I wanted to read my c++ book and time runs fast.
Thanks for help, pieprzmak.