Ubuntu中文论坛

每次更新都要我插入磁碟，我U盤安裝的哪有什麼磁碟啊？

詳細信息如下


GPG 错误：http://extras.ubuntu.com maverick Release: 由於無法取得它們的公鑰，以下簽章無法進行驗證： NO_PUBKEY DB141E2302FDF932無法取得 cdrom://Ubuntu 10.10 _Maverick Meerkat_ - Release i386 (20101007)/dists/maverick/main/i18n/Translation-en.bz2，
無法取得 cdrom://Ubuntu 10.10 _Maverick Meerkat_ - Release i386 (20101007)/dists/maverick/main/i18n/Translation-zh.bz2，
無法取得 cdrom://Ubuntu 10.10 _Maverick Meerkat_ - Release i386 (20101007)/dists/maverick/main/i18n/Translation-zh_CN.bz2，
無法取得 cdrom://Ubuntu 10.10 _Maverick Meerkat_ - Release i386 (20101007)/dists/maverick/main/i18n/Translation-zh_HK.bz2，
無法取得 cdrom://Ubuntu 10.10 _Maverick Meerkat_ - Release i386 (20101007)/dists/maverick/main/i18n/Translation-zh_TW.bz2，
無法取得 cdrom://Ubuntu 10.10 _Maverick Meerkat_ - Release i386 (20101007)/dists/maverick/restricted/i18n/Translation-en.bz2，
無法取得 cdrom://Ubuntu 10.10 _Maverick Meerkat_ - Release i386 (20101007)/dists/maverick/restricted/i18n/Translation-zh.bz2，
無法取得 cdrom://Ubuntu 10.10 _Maverick Meerkat_ - Release i386 (20101007)/dists/maverick/restricted/i18n/Translation-zh_CN.bz2，
無法取得 cdrom://Ubuntu 10.10 _Maverick Meerkat_ - Release i386 (20101007)/dists/maverick/restricted/i18n/Translation-zh_HK.bz2，
無法取得 cdrom://Ubuntu 10.10 _Maverick Meerkat_ - Release i386 (20101007)/dists/maverick/restricted/i18n/Translation-zh_TW.bz2，
無法取得 cdrom://Ubuntu 10.10 _Maverick Meerkat_ - Release i386 (20101007)/dists/maverick/Release，
無法取得 http://ppa.launchpad.net/ibus-dev/ibus- ... Sources.gz，404 Not Found
無法取得 http://ppa.launchpad.net/ibus-dev/ibus- ... ackages.gz，404 Not Found
無法取得 http://deb.opera.com/opera/dists/stable ... kages.lzma，
無法取得 http://deb.opera.com/opera-beta/dists/s ... kages.lzma，

software sources里面不要勾选cd