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yum install error
[root@localhost cmake-3.2.2]# yum install gcc
Loaded plugins: fastestmirror, refresh-packagekit, security
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=6&arch=x86_64&repo=os error was
14: PYCURL ERROR 6 – "Couldn't resolve host 'mirrorlist.centos.org'"
Error: Cannot retrieve repository metadata (repomd.xml) for repository: base. Please verify its path and try again
[root@localhost cmake-3.2.2]# yum install gcc-c++
Loaded plugins: fastestmirror, refresh-packagekit, security
Determining fastest mirrors
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=6&arch=x86_64&repo=os error was
14: PYCURL ERROR 6 – "Couldn't resolve host 'mirrorlist.centos.org'"
Error: Cannot find a valid baseurl for repo: base
解决方法如下（修改dns配置）
vi /etc/resolv.conf
在此文件最后加入：nameserver 114.114.114.114
再次安装正常：
[root@localhost cmake-3.2.2]# yum install gcc
Loaded plugins: fastestmirror, refresh-packagekit, security
Loading mirror speeds from cached hostfile
* base: mirrors.tuna.tsinghua.edu.cn
* extras: mirrors.btte.net
* updates: mirrors.tuna.tsinghua.edu.cn
Setting up Install Process
Resolving Dependencies
–> Running transaction check
—> Package gcc.x86_64 0:4.4.7-17.el6 will be installed
–> Processing Dependency: libgomp = 4.4.7-17.el6 for package: gcc-4.4.7-17.el6.x86_64
–> Processing Dependency: cpp = 4.4.7-17.el6 for package: gcc-4.4.7-17.el6.x86_64
–> Processing Dependency: libgcc >= 4.4.7-17.el6 for package: gcc-4.4.7-17.el6.x86_64
–> Processing Dependency: cloog-ppl >= 0.15 for package: gcc-4.4.7-17.el6.x86_64
–> Running transaction check
—> Package cloog-ppl.x86_64 0:0.15.7-1.2.el6 will be installed
–> Processing Dependency: libppl_c.so.2()(64bit) for package: cloog-ppl-0.15.7-1.2.el6.x86_64
–> Processing Dependency: libppl.so.7()(64bit) for package: cloog-ppl-0.15.7-1.2.el6.x86_64
—> Package cpp.x86_64 0:4.4.7-17.el6 will be installed
–> Processing Dependency: libmpfr.so.1()(64bit) for package: cpp-4.4.7-17.el6.x86_64
—> Package libgcc.i686 0:4.4.7-4.el6 will be updated
—> Package libgcc.x86_64 0:4.4.7-4.el6 will be updated
—> Package libgcc.i686 0:4.4.7-17.el6 will be an update
—> Package libgcc.x86_64 0:4.4.7-17.el6 will be an update
—> Package libgomp.x86_64 0:4.4.7-4.el6 will be updated
—> Package libgomp.x86_64 0:4.4.7-17.el6 will be an update
–> Running transaction check
—> Package mpfr.x86_64 0:2.4.1-6.el6 will be installed
—> Package ppl.x86_64 0:0.10.2-11.el6 will be installed
–> Finished Dependency Resolution
Dependencies Resolved
==============================================================================================================================================
Package Arch Version Repository Size
==============================================================================================================================================
Installing:
gcc x86_64 4.4.7-17.el6 base 10 M
Installing for dependencies:
cloog-ppl x86_64 0.15.7-1.2.el6 base 93 k
cpp x86_64 4.4.7-17.el6 base 3.7 M
mpfr x86_64 2.4.1-6.el6 base 157 k
ppl x86_64 0.10.2-11.el6 base 1.3 M
Updating for dependencies:
libgcc i686 4.4.7-17.el6 base 114 k
libgcc x86_64 4.4.7-17.el6 base 103 k
libgomp x86_64 4.4.7-17.el6 base 134 k
Transaction Summary
==============================================================================================================================================
Install 5 Package(s)
Upgrade 3 Package(s)
Total download size: 16 M
Is this ok [y/N]:
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