之前的文章写了《Linode VPS 安装Google BBR教程》，但是提到了针对Linode的Xen方案暂时装不了。今天我又花时间研究了一下，证明Xen方案也是可以装BBR的。
首先需要修改Xen VPS的内核。参考官方的教程《Run a Distribution-Supplied Kernel with PV-GRUB》。
apt-get update apt-get upgrade --show-upgraded
卸载grub2，安装grub。
apt-get install linux-image-virtual apt-get purge grub2 grub-pc apt-get install grub mkdir /boot/grub update-grub
When you are asked which devices you would like to install grub on, leave all listed devices unchecked and select Ok to continue. When you are asked whether you would like to continue without installing GRUB, answer yes. When you are asked to confirm removal of GRUB 2 from /boot/grub, answer yes. When you are asked whether you would like a menu.lstfile generated for you, answer yes.
简单地说遇到有问题的都选YES。然后第一次问你在哪装grub的时候一个都不要选，直接点ok。
打开/boot/grub/menu.lst这个文件。
将
timeout 3
修改为
timeout 10
将
# kopt=root=UUID=de400b9f-2578-488e-8664-250a8455a6fc ro
修改为
# kopt=root=/dev/xvda console=hvc0 ro quiet
将
# groot=(hd0,0)
修改为
# groot=(hd0)
升级一下grub
update-grub
打开/etc/init/hvc0.conf，查看是否和下面的一致：
# hvc0 - getty # # This service maintains a getty on hvc0 from the point the system is # started until it is shut down again. start on stopped rc RUNLEVEL=[2345] stop on runlevel [!2345] respawn exec /sbin/getty -8 38400 hvc0
接下来，将内核修改为pv-grub-x86_32 或者 pv-grub-x86_64。
确保root device是xvda。
在Filesystem/Boot Helpers 这里，将 Distro Helper 禁用。
保存profile，然后重启。
接下来一键安装bbr。
wget --no-check-certificate https://github.com/teddysun/across/raw/master/bbr.sh chmod +x bbr.sh ./bbr.sh
Linode目前最便宜只需5美元一个月，有需要可以直接点击下方链接购买。
| 方案 | 内存 | CPU | 硬盘 | 流量 | 带宽In/Out | 价格 | 购买 |
|---|---|---|---|---|---|---|---|
| Linode 1G | 1GB | 1核 | 20GB SSD | 1TB | 40Gbps/1000Mbps | $5/月 | 购买 |
| Linode 2G | 2GB | 1核 | 30GB SSD | 2TB | 40Gbps/1000Mbps | $10/月 | 购买 |
| Linode 4G | 4GB | 2核 | 48GB SSD | 3TB | 40Gbps/1000Mbps | $20/月 | 购买 |
| Linode 8G | 8GB | 4核 | 96GB SSD | 4TB | 40Gbps/1000Mbps | $40/月 | 购买 |
| Linode 12G | 12GB | 6核 | 192GB SSD | 8TB | 40Gbps/1000Mbps | $80/月 | 购买 |
| Linode 24G | 24GB | 8核 | 384GB SSD | 16TB | 40Gbps/2000Mbps | $160/月 | 购买 |
| Linode 48G | 48GB | 12核 | 768GB SSD | 20TB | 40Gbps/4000Mbps | $320/月 | 购买 |
| Linode 64G | 64GB | 16核 | 1152GB SSD | 20TB | 40Gbps/6000Mbps | $480/月 | 购买 |
| Linode 80G | 80GB | 20核 | 1536GB SSD | 20TB | 40Gbps/8000Mbps | $640/月 | 购买 |
| Linode 16G | 16GB | 1核 | 20GB SSD | 5TB | 40Gbps/1000Mbps | $60/月 | 购买 |
| Linode 32G | 32GB | 2核 | 40GB SSD | 6TB | 40Gbps/1500Mbps | $120/月 | 购买 |
| Linode 60G | 60GB | 4核 | 90GB SSD | 7TB | 40Gbps/3000Mbps | $240/月 | 购买 |
| Linode 100G | 100GB | 8核 | 200GB SSD | 8TB | 40Gbps/6000Mbps | $480/月 | 购买 |
| Linode 200G | 200GB | 16核 | 340GB SSD | 9TB | 40Gbps/10000Mbps | $960/月 | 购买 |