前言
执行安装命令为 yum install mondo 第一次安装时报错为
Public key for perl-IO-Interface-1.05-2.el7.x86_64.rpm is not installed
Failing package is: perl-IO-Interface-1.05-2.el7.x86_64
GPG Keys are configured as: ftp://ftp.mondorescue.org//centos/7/x86_64/mondorescue.pubkey第二次安装报错为
warning: /var/cache/yum/x86_64/7/mondorescue/packages/perl-IO-Interface-1.05-2.el7.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 37db9883: NOKEY
Retrieving key from ftp://ftp.mondorescue.org//centos/7/x86_64/mondorescue.pubkey
The GPG keys listed for the "centos 7 x86_64 - mondorescue Vanilla Packages" repository are already installed but they are not correct for this package.
Check that the correct key URLs are configured for this repository.
Failing package is: perl-IO-Interface-1.05-2.el7.x86_64
GPG Keys are configured as: ftp://ftp.mondorescue.org//centos/7/x86_64/mondorescue.pubkey解决方法
参考：yum 安装报错The GPG keys listed for the “CentOS-7 - Base - 163.com“ repository are already installed but 我这使用通过参数指定不检查数字签名方式进行安装
yum install mondo --nogpgcheck
或修改repo文件，改为 gpgcheck=0
[mondorescue]
name=centos 7 x86_64 - mondorescue Vanilla Packages
baseurl=ftp://ftp.mondorescue.org//centos/7/x86_64
enabled=1
gpgcheck=0
gpgkey=ftp://ftp.mondorescue.org//centos/7/x86_64/mondorescue.pubkey题外话
虚拟机使用mondo成功生产了iso，但使用虚拟机恢复的时候缺出错了。最终还是选择弃用了。