[SOLVED] main non-root user shell prompt lost

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http://www.linuxquestions.org – Sooo embarrassed... While fooling around (let's call it "exploring the cli") with two files: .bashrc_profile and .bashrc, I have managed to completely "disappear" my main user's shell prompt! At the console prompt (or an xterm for that matter) I can log in as root; but when I try with my non-root user, on entering log and p/word, the prompt goes to null, then, after 3 or 4 seconds, the main prompt is restored. I know that I have to reset it by using something like: <PS1=\u\h\w$> but I do not know where to begin to do this. And all the help notes I googled assume t (HowTos)