glibc
glibc是GNU发布的libc库，即c运行库。glibc是linux系统中最底层的api，几乎其它任何运行库都会依赖于glibc；
它本身也提供了许多其它一些必要功能服务的实现；
libc.so.6
libc.so.6是一个链接到glibc的软链接；
对glibc的升级其实是对libc.so.6这个库的更改；
libc.so.6删除之后会导致系统很多命令的失效，所以对libc.so.6的更改要小心小心再小心，很容易将系统搞崩溃；
查看libc.so.6的版本
需要知道libc.so.6这个库在哪个位置，一般是/lib、/lib64、/usr/lib、/usr/lib64这四个文件夹下
用strings命令查看版本号；
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[root@localhost /]# find / -iname libc.so.6 /lib/libc.so.6 /lib/i686/nosegneg/libc.so.6 [root@localhost /]# strings /lib/libc.so.6 | grep GLIBC_ GLIBC_2.0 GLIBC_2.1 GLIBC_2.1.1 GLIBC_2.1.2 GLIBC_2.1.3 GLIBC_2.2 GLIBC_2.2.1 GLIBC_2.2.2 GLIBC_2.2.3 GLIBC_2.2.4 GLIBC_2.2.6 GLIBC_2.3 GLIBC_2.3.2 GLIBC_2.3.3 GLIBC_2.3.4 GLIBC_2.4 GLIBC_2.5 GLIBC_2.6 GLIBC_2.7 GLIBC_2.8 GLIBC_2.9 GLIBC_2.10 GLIBC_2.11 GLIBC_2.12 GLIBC_PRIVATE |
升级libc.so.6
两种方法升级，一种是通过rpm包升级，另外一种是通过编译glibc，然后将生成的库链接到libc.so.6上。
通过rpm包对Centos6.x的32位系统的升级：
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wget https://copr-be.cloud.fedoraproject.org/results/mosquito/myrepo-el6/epel-6-i386/glibc-2.17-55.fc20/glibc-2.17-55.el6.i686.rpm wget https://copr-be.cloud.fedoraproject.org/results/mosquito/myrepo-el6/epel-6-i386/glibc-2.17-55.fc20/glibc-common-2.17-55.el6.i686.rpm wget https://copr-be.cloud.fedoraproject.org/results/mosquito/myrepo-el6/epel-6-i386/glibc-2.17-55.fc20/glibc-devel-2.17-55.el6.i686.rpm wget https://copr-be.cloud.fedoraproject.org/results/mosquito/myrepo-el6/epel-6-i386/glibc-2.17-55.fc20/glibc-headers-2.17-55.el6.i686.rpm wget https://copr-be.cloud.fedoraproject.org/results/mosquito/myrepo-el6/epel-6-i386/glibc-2.17-55.fc20/glibc-utils-2.17-55.el6.i686.rpm wget https://copr-be.cloud.fedoraproject.org/results/mosquito/myrepo-el6/epel-6-i386/glibc-2.17-55.fc20/glibc-static-2.17-55.el6.i686.rpm wget https://copr-be.cloud.fedoraproject.org/results/mosquito/myrepo-el6/epel-6-i386/glibc-2.17-55.fc20/nscd-2.17-55.el6.i686.rpm sudo rpm -Uvh *-2.17-55.el6.i686.rpm |
通过rpm包对Centos6.x的64位系统的升级：
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wget http://copr-be.cloud.fedoraproject.org/results/mosquito/myrepo-el6/epel-6-x86_64/glibc-2.17-55.fc20/glibc-utils-2.17-55.el6.x86_64.rpm & wget http://copr-be.cloud.fedoraproject.org/results/mosquito/myrepo-el6/epel-6-x86_64/glibc-2.17-55.fc20/glibc-static-2.17-55.el6.x86_64.rpm & wget http://copr-be.cloud.fedoraproject.org/results/mosquito/myrepo-el6/epel-6-x86_64/glibc-2.17-55.fc20/glibc-2.17-55.el6.x86_64.rpm & wget http://copr-be.cloud.fedoraproject.org/results/mosquito/myrepo-el6/epel-6-x86_64/glibc-2.17-55.fc20/glibc-common-2.17-55.el6.x86_64.rpm & wget http://copr-be.cloud.fedoraproject.org/results/mosquito/myrepo-el6/epel-6-x86_64/glibc-2.17-55.fc20/glibc-devel-2.17-55.el6.x86_64.rpm & wget http://copr-be.cloud.fedoraproject.org/results/mosquito/myrepo-el6/epel-6-x86_64/glibc-2.17-55.fc20/glibc-headers-2.17-55.el6.x86_64.rpm & wget http://copr-be.cloud.fedoraproject.org/results/mosquito/myrepo-el6/epel-6-x86_64/glibc-2.17-55.fc20/nscd-2.17-55.el6.x86_64.rpm & sudo rpm -e --nodeps --justdb glibc-2.*.i686 --allmatches sudo rpm -Uvh *-2.17-55.el6.x86_64.rpm #或者： sudo rpm -Uvh *-2.17-55.el6.x86_64.rpm --force --nodeps |
安装包下载地址：
https://copr-be.cloud.fedoraproject.org/results/mosquito/myrepo-el6/epel-6-i386/glibc-2.17-55.fc20/
