在用yum安装mysql的时候提示：

Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Warning: RPMDB altered outside of yum.
  Installing : mysql-community-common-5.7.24-1.el7.x86_64                                                                                                               1/4 
  Installing : mysql-community-libs-5.7.24-1.el7.x86_64                                                                                                                 2/4 
  Installing : mysql-community-client-5.7.24-1.el7.x86_64                                                                                                               3/4 
  Installing : mysql-community-server-5.7.24-1.el7.x86_64                                                                                                               4/4 
  Verifying  : mysql-community-server-5.7.24-1.el7.x86_64                                                                                                               1/4 
  Verifying  : mysql-community-libs-5.7.24-1.el7.x86_64                                                                                                                 2/4 
  Verifying  : mysql-community-common-5.7.24-1.el7.x86_64                                                                                                               3/4 
  Verifying  : mysql-community-client-5.7.24-1.el7.x86_64

解决办法是删除yum的历史记录

rm -rf /var/lib/yum/history/*.sqlite