在执行yum命令时，出现以下异常
[root@hisdb1 yum.repos.d]# yum -y install gcc
Loaded plugins: fastestmirror, langpacks
You have enabled checking of packages via GPG keys. This is a good thing.
However, you do not have any GPG public keys installed. You need to download
the keys for packages you wish to install and install them.
You can do that by running the command:
rpm --import public.gpg.key
Alternatively you can specify the url to the key you would like to use
for a repository in the 'gpgkey' option in a repository section and yum
will install it for you.
For more information contact your distribution or package provider.
Problem repository: centos7
查询资料确认是系统检查不到GPG公匙，执行以下命令，
[root@hisdb1 ~]# rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
再次安装gcc，无异常发生
[root@hisdb1 ~]# yum install -y gcc
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
Resolving Dependencies
--> Running transaction check
---> Package gcc.x86_64 0:4.8.5-44.el7 will be installed
--> Processing Dependency: cpp = 4.8.5-44.el7 for package: gcc-4.8.5-44.el7.x86_64
--> Processing Dependency: glibc-devel >= 2.2.90-12 for package: gcc-4.8.5-44.el7.x86_64
--> Running transaction check
---> Package cpp.x86_64 0:4.8.5-44.el7 will be installed
---> Package glibc-devel.x86_64 0:2.17-317.el7 will be installed
--> Processing Dependency: glibc-headers = 2.17-317.el7 for package: glibc-devel-2.17-317.el7.x86_64
--> Processing Dependency: glibc-headers for package: glibc-devel-2.17-317.el7.x86_64
--> Running transaction check
---> Package glibc-headers.x86_64 0:2.17-317.el7 will be installed
--> Processing Dependency: kernel-headers >= 2.2.1 for package: glibc-headers-2.17-317.el7.x86_64
--> Processing Dependency: kernel-headers for package: glibc-headers-2.17-317.el7.x86_64
--> Running transaction check
---> Package kernel-headers.x86_64 0:3.10.0-1160.el7 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
=============================================================================================================================
Package Arch Version Repository Size
=============================================================================================================================
Installing:
gcc x86_64 4.8.5-44.el7 centos7 16 M
Installing for dependencies:
cpp x86_64 4.8.5-44.el7 centos7 5.9 M
glibc-devel x86_64 2.17-317.el7 centos7 1.1 M
glibc-headers x86_64 2.17-317.el7 centos7 690 k
kernel-headers x86_64 3.10.0-1160.el7 centos7 9.0 M
Transaction Summary
=============================================================================================================================
Install 1 Package (+4 Dependent packages)
Total download size: 33 M
Installed size: 59 M
Downloading packages:
-----------------------------------------------------------------------------------------------------------------------------
Total 45 MB/s | 33 MB 00:00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : cpp-4.8.5-44.el7.x86_64 1/5
Installing : kernel-headers-3.10.0-1160.el7.x86_64 2/5
Installing : glibc-headers-2.17-317.el7.x86_64 3/5
Installing : glibc-devel-2.17-317.el7.x86_64 4/5
Installing : gcc-4.8.5-44.el7.x86_64 5/5
Verifying : glibc-devel-2.17-317.el7.x86_64 1/5
Verifying : gcc-4.8.5-44.el7.x86_64 2/5
Verifying : kernel-headers-3.10.0-1160.el7.x86_64 3/5
Verifying : glibc-headers-2.17-317.el7.x86_64 4/5
Verifying : cpp-4.8.5-44.el7.x86_64 5/5
Installed:
gcc.x86_64 0:4.8.5-44.el7
Dependency Installed:
cpp.x86_64 0:4.8.5-44.el7 glibc-devel.x86_64 0:2.17-317.el7 glibc-headers.x86_64 0:2.17-317.el7
kernel-headers.x86_64 0:3.10.0-1160.el7
Complete!
