yum install *** 出现 key ID c105b9de: NOKEY

yum install -y openssh-server

.....省略

Transaction Summary
================================================================================================
Install 19 Package(s)
Upgrade 2 Package(s)

Total download size: 21 M
Downloading Packages:
------------------------------------------------------------------------------------------------
Total 130 MB/s | 21 MB 00:00
warning: rpmts_HdrFromFdno: Header V3 RSA/SHA1 Signature, key ID c105b9de: NOKEY

Public key for iptables-1.4.7-19.el6.x86_64.rpm is not installed

等出现"NOKEY"明显是手工修改过仓库配置文件 *.repo,如果忽视,或者没有其中一行:

gpgcheck=

结论: yum 默认配置为 gpgcheck=1,所以手工配置的本地仓库注意不要忽视了

[root@ccb7f5037985 yum.repos.d]# grep gpgcheck /etc/yum.conf
gpgcheck=1