how to delete blacklisted items from /etc/modprobe.d/blacklist.conf?

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http://askubuntu.com – My wireless doesn't work with Ubuntu 12.04.(it worked with 10.04 LTS) I have a Dell Inspiron 1501. I followed the steps posted below: Run these: sudo apt-get install --reinstall bcmwl-kernel-source broadcom-sta-common broadcom-sta-source echo "blacklist brcmsmac" | sudo tee -a /etc/modprobe.d/blacklist.conf echo "blacklist bcma" | sudo tee -a /etc/modprobe.d/blacklist.conf The first makes sure that the sta driver is in place, the second and third blacklists the two drivers brcmsmac and bcma which clash with the correct sta driver. Copy/paste or make sure your typing is correct! The last s (HowTos)