教程：CentOS 6 更新glibc到2.15 / OpenVZ

背景

狗博主一直喜欢用CentOS 6（就像很多人不习惯其他操作平台一样），最近又剁了几个OVZ小鸡，想着给他装GOOGLE BBR的时候，却发现glibc还停留在2.13，这里我知道的有两种更新方式，推荐使用第一种，会比较快。

OpenVZ 更新glibc到2.15

方法一：rpm安装

先下载以下几个文件：

wget http://ftp.redsleeve.org/pub/steam/glibc-2.15-60.el6.x86_64.rpm \
http://ftp.redsleeve.org/pub/steam/glibc-common-2.15-60.el6.x86_64.rpm \
http://ftp.redsleeve.org/pub/steam/glibc-devel-2.15-60.el6.x86_64.rpm \
http://ftp.redsleeve.org/pub/steam/glibc-headers-2.15-60.el6.x86_64.rpm \
http://ftp.redsleeve.org/pub/steam/nscd-2.15-60.el6.x86_64.rpm

然后安装

rpm -Uvh glibc-2.15-60.el6.x86_64.rpm \
glibc-common-2.15-60.el6.x86_64.rpm \
glibc-devel-2.15-60.el6.x86_64.rpm \
glibc-headers-2.15-60.el6.x86_64.rpm \
nscd-2.15-60.el6.x86_64.rpm

方法二：编译安装（上面的方式行不通，再用编译的方式，编译的方式相对时长会久很多）

wget http://ftp.gnu.org/gnu/glibc/glibc-2.15.tar.gz
wget http://ftp.gnu.org/gnu/glibc/glibc-ports-2.15.tar.gz
tar -zxf glibc-2.15.tar.gz
tar -zxf glibc-ports-2.15.tar.gz
mv glibc-ports-2.15 glibc-2.15/ports
mkdir glibc-build-2.15
cd glibc-build-2.15
../glibc-2.15/configure --prefix=/usr --disable-profile --enable-add-ons --with-headers=/usr/include --with-binutils=/usr/bin
make all && make install

检查是否成功安装

ldd --version

成功安装的输入如下

Copyright (C) 2012 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Written by Roland McGrath and Ulrich Drepper.

成功安装完成后就可以愉快的安装bbr了，可以参考我这里的一键bbr脚本：
https://www.sabia.cc/bash-openvz-bbr-lkl-nanqinlang.html