centos yum update 报错 Delta RPMs disabled because /usr/bin/applydeltarpm not installed 解决方法

解决方法：yum install deltarpm -y

问题原因：需要安装 applydeltarpm

解决过程：先使用provides命令，查看是哪个包提供applydeltarpm

[root@ecs-7bc3 ~]# yum provides '*/applydeltarpm'
已加载插件：fastestmirror
Loading mirror speeds from cached hostfile
extras/7/aarch64/filelists_db                            | 268 kB     00:23     
deltarpm-3.6-3.el7.aarch64 : Create deltas between rpms
源    ：base
匹配来源：
文件名    ：/usr/bin/applydeltarpm


[root@ecs-7bc3 ~]# yum install deltarpm
已加载插件：fastestmirror
Loading mirror speeds from cached hostfile
正在解决依赖关系
--> 正在检查事务
---> 软件包 deltarpm.aarch64.0.3.6-3.el7 将被 安装
--> 解决依赖关系完成

依赖关系解决

================================================================================
 Package            架构              版本                 源              大小
================================================================================
正在安装:
 deltarpm           aarch64           3.6-3.el7            base            82 k

事务概要
================================================================================
安装  1 软件包

总下载量：82 k
安装大小：201 k
Is this ok [y/d/N]: y
Downloading packages:
deltarpm-3.6-3.el7.aarch64.rpm                             |  82 kB   00:05     
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  正在安装    : deltarpm-3.6-3.el7.aarch64                                  1/1 
  验证中      : deltarpm-3.6-3.el7.aarch64                                  1/1 

已安装:
  deltarpm.aarch64 0:3.6-3.el7                                                  

完毕！