6 升级到 6.1 后安装 git 报错：
root@dad:/# yum install git
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirror.nsc.liu.se
* epel: ftp.riken.jp
* extras: mirror.nsc.liu.se
* ius: pancks.sothatswhy.org.uk
* rpmforge: ftp-stud.fht-esslingen.de
* updates: centosu.centos.org
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package git.i386 0:1.7.6.4-1.el5.rf will be installed
--> Processing Dependency: perl-Git = 1.7.6.4-1.el5.rf for package: git-1.7.6.4-1.el5.rf.i386
--> Processing Dependency: libcurl.so.3 for package: git-1.7.6.4-1.el5.rf.i386
--> Processing Dependency: libexpat.so.0 for package: git-1.7.6.4-1.el5.rf.i386
--> Processing Dependency: perl(Git) for package: git-1.7.6.4-1.el5.rf.i386
--> Running transaction check
---> Package compat-expat1.i686 0:1.95.8-8.el6 will be installed
---> Package git.i386 0:1.7.6.4-1.el5.rf will be installed
--> Processing Dependency: libcurl.so.3 for package: git-1.7.6.4-1.el5.rf.i386
---> Package perl-Git.i386 0:1.7.6.4-1.el5.rf will be installed
--> Finished Dependency Resolution
Error: Package: git-1.7.6.4-1.el5.rf.i386 (rpmforge)
Requires: libcurl.so.3
You could try using --skip-broken to work around the problem
You could try running: rpm -Va --nofiles --nodigest
解决方案：编辑 /etc/yum.repos.d/rpmforge.repo，开启 extra repo
再次执行后：
... Running rpm_check_debug Running Transaction Test Transaction Test Succeeded Running Transaction Warning: RPMDB altered outside of yum. Installing : git-1.7.6.4-1.el6.rfx.i686 1/2 Installing : perl-Git-1.7.6.4-1.el6.rfx.i686 2/2 Installed: git.i686 0:1.7.6.4-1.el6.rfx Dependency Installed: perl-Git.i686 0:1.7.6.4-1.el6.rfx Complete!
解决方案（来源）：
yum clean all