當在CentOS 6.2執行yum update時，報錯如下：
Setting up Update Process
Resolving Dependencies
--> Running transaction check
---> Package openmpi.x86_64 0:1.5.3-3.el6 will be updated
--> Processing Dependency: libotf.so.0()(64bit) for package: 1:emacs-23.1-21.el6_2.3.x86_64
Package openmpi-psm is obsoleted by openmpi, but obsoleting package does not provide for requirements
---> Package openmpi.x86_64 0:1.5.4-1.el6 will be an update
--> Finished Dependency Resolution
Error: Package: 1:emacs-23.1-21.el6_2.3.x86_64 (@updates)
Requires: libotf.so.0()(64bit)
Removing: openmpi-1.5.3-3.el6.x86_64 (@anaconda-CentOS-201112091719.x86_64/6.2)
libotf.so.0()(64bit)
Updated By: openmpi-1.5.4-1.el6.x86_64 (base)
Not found
Available: libotf-0.9.9-3.1.el6.x86_64 (base)
libotf.so.0()(64bit)
Available: openmpi-psm-1.5.3-3.el6.x86_64 (base)
libotf.so.0()(64bit)
You could try using --skip-broken to work around the problem
You could try running: rpm -Va --nofiles --nodigest
事實上是openmpi的錯誤，解決辦法：
yum install libotf
更多CentOS相關信息見CentOS 專題頁面 http://www.linuxidc.com/topicnews.aspx?tid=14
