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Are you looking for the password that's configured on your computer to gain access to the WiFi network? Please indicate what distribution of Linux you're using (CentOS, Fedora, Debian, Slackware, ...) and what desktop environment (Gnome, KDE, Xfce, ...). With that information we'll be able to give you a more dedicated answer.
Looking forward to your participation in the forums. Have fun with Linux.