安装mysql-shell-8.0.21-1.el7.x86_64.rpm时报异常:
error:unpacking of archive failed on file /usr/bin/mysqlsh:cpio:rename failed -Is a directory
error:mysql-shell-8.0.21-1.el7.x86_64.rpm install failed
原因：
安装mysql-shell-8.0.21-1.el7.x86_64.rpm时，需要操作mysqlsh文件的权限，把mysqlsh文件删除即可
解决方案：
rm -rf /usr/bin/mysqlsh
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