【转】使用aliyun阿里云镜像服务器，转自http://theo.im/blog/2014/05/20/use-aliyun-mirror-to-boost-up-download-speed/
最近本机访问 163.com 的 CentOS 镜像比较不稳定，体现在 ping 很低，但是 HTTP 连接很慢，yum 的 fastestmirror 也不太理想，所以一般都禁用之。
发现阿里云的镜像服务器，立马换了，便秘立刻就通了。
yum 镜像
官方源镜像
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# 禁用 fastestmirror 插件
sed -i.backup ‘s/^enabled=1/enabled=0/’ /etc/yum/pluginconf.d/fastestmirror.conf
# 备份
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
# 使用阿里云镜像
wget -O /etc/yum.repos.d/CentOS-Base-aliyun.repo http://mirrors.aliyun.com/repo/Centos-6.repo
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EPEL 镜像
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# 安装 EPEL 源
wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6–8.noarch.rpm
wget http://rpms.famillecollet.com/enterprise/remi-release-6.rpm
rpm -Uvh remi-release-6*.rpm epel-release-6*.rpm
# 使用阿里云镜像
if [[ ! -f /etc/yum.repos.d/epel.repo.backup ]]; then
mv /etc/yum.repos.d/epel.repo /etc/yum.repos.d/epel.repo.backup 2>/dev/null || :
fi
if [[ ! -f /etc/yum.repos.d/epel-testing.repo.backup ]]; then
mv /etc/yum.repos.d/epel-testing.repo /etc/yum.repos.d/epel-testing.repo.backup 2>/dev/null || :
fi
wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-6.repo
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PyPi 镜像
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mkdir -p ~/.pip
touch ~/.pip/pip.conf
sed -i.backup -r \
‘s/^index-url\s*=\s*.+$/index-url = http:\/\/mirrors.aliyun.com\/pypi\/simple\//’ \
~/.pip/pip.conf
# If file not changed, write contents back to pip.conf
diff “~/.pip/pip.conf” “~/.pip/pip.conf.backup” &> /dev/null
if [ $? -eq 0 ]; then
cat > ~/.pip/pip.conf <<EOF
[global]
index-url = http://mirrors.aliyun.com/pypi/simple/
EOF
fi
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RubyGems 镜像
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gem source -r https://rubygems.org/
gem source -a http://mirrors.aliyun.com/rubygems/
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