官方源还是最可靠的，虽然速度未必很快，总比 404 强
http://archives.fedoraproject.org/pub/archive/fedora/linux/updates/12/i386/
sudo vim fedora.repo 清空文件后，贴入以下官方源
[Fedora-fedoraproject.org] name=Fedora 12 – i386 baseurl=http://archives.fedoraproject.org/pub/archive/fedora/linux/updates/12/i386/ enabled=1 gpgcheck=0 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-Fedora file:///etc/pki/rpm-gpg/RPM-GPG-KEY
sudo vim fedora.repo
[fedora] name=Fedora $releasever - $basearch failovermethod=priority #baseurl=http://download.fedoraproject.org/pub/fedora/linux/releases/$releasever/Everything/$basearch/os/ baseurl=http://ftp.pbone.net/mirror/archive.fedoraproject.org/fedora/linux/releases/$releasever/Everything/$basearch/os/ #mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=fedora-$releasever&arch=$basearch enabled=1 metadata_expire=7d gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-$basearch [fedora-debuginfo] name=Fedora $releasever - $basearch - Debug failovermethod=priority #baseurl=http://download.fedoraproject.org/pub/fedora/linux/releases/$releasever/Everything/$basearch/debug/ mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=fedora-debug-$releasever&arch=$basearch enabled=0 metadata_expire=7d gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-$basearch [fedora-source] name=Fedora $releasever - Source failovermethod=priority #baseurl=http://download.fedoraproject.org/pub/fedora/linux/releases/$releasever/Everything/source/SRPMS/ mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=fedora-source-$releasever&arch=$basearch enabled=0 metadata_expire=7d gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-$basearch
sudo vim fedora-updates.repo
[updates] name=Fedora $releasever - $basearch - Updates failovermethod=priority #baseurl=http://download.fedoraproject.org/pub/fedora/linux/updates/$releasever/$basearch/ baseurl=http://ftp.pbone.net/mirror/archive.fedoraproject.org/fedora/linux/updates/$releasever/$basearch/ #mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=updates-released-f$releasever&arch=$basearch enabled=1 gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-$basearch [updates-debuginfo] name=Fedora $releasever - $basearch - Updates - Debug failovermethod=priority #baseurl=http://download.fedoraproject.org/pub/fedora/linux/updates/$releasever/$basearch/debug/ mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=updates-released-debug-f$releasever&arch=$basearch enabled=0 gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-$basearch [updates-source] name=Fedora $releasever - Updates Source failovermethod=priority #baseurl=http://download.fedoraproject.org/pub/fedora/linux/updates/$releasever/SRPMS/ mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=updates-released-source-f$releasever&arch=$basearch enabled=0 gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-$basearch
sudo yum clean all
sudo yum makecache