yum-config-manager --add-repo=

[root@server0 yum.repos.d]# yum-config-manager --add-repo=ftp://192.168.31.121/centos7u4
Loaded plugins: langpacks, product-id
adding repo from: ftp://192.168.31.121/centos7u4

[192.168.31.121_centos7u4]
name=added from: ftp://192.168.31.121/centos7u4
baseurl=ftp://192.168.31.121/centos7u4
enabled=1

[root@server0 yum.repos.d]# yum repolist
Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-manager
This system is not registered with an entitlement server. You can use subscription-manager to register.
192.168.31.121_centos7u4 | 3.6 kB 00:00:00
(1/2): 192.168.31.121_centos7u4/group_gz | 156 kB 00:00:00
(2/2): 192.168.31.121_centos7u4/primary_db | 3.1 MB 00:00:00
repo id repo name status
192.168.31.121_centos7u4 added from: ftp://192.168.31.121/centos7u4 3,894
repolist: 3,894
[root@server0 yum.repos.d]#

添加gpgkey 不检查

[root@server0 yum.repos.d]# cat 192.168.31.121_centos7u4.repo

[192.168.31.121_centos7u4]
name=added from: ftp://192.168.31.121/centos7u4
baseurl=ftp://192.168.31.121/centos7u4
enabled=1
gpgcheck=0
[root@server0 yum.repos.d]#