在使用yum 时总是有提示信息：
There are unfinished transactions remaining. You might consider running yum-complete-transaction first to finish them. The program yum-complete-transaction is found in the yum-utils package.
意思是，有未完成的yum事务，建议先运行yum-complete-transaction命令清除。
处理步骤：
# 安装 yum-complete-transaction
yum install yum-utils
# 运行 yum-complete-transaction
yum-complete-transaction –cleanup-only
# 清除可能存在的重复包
package-cleanup –dupes
# 清除可能存在的损坏包
package-cleanup –problems