Offline Repository Procedure for CentOS 7

How to set up the CentOS 7 package manager on a system with no internet access to the TelcoBridges repository, using a downloaded local copy.

This describes the configuration of CentOS packages manager for a system that does not have access to TelcoBridges repository (no internet access).

Download TelcoBridges repository

Download the ISO image of TelcoBridges repository on a machine that has access to the system.

• Minimal version is here: tb_centos7_x86_64_repo_minimal.iso (2025.07 0.9GB)

• Full version is here: tb_centos7_x86_64_repo.iso (2025.07 6.6GB)

Upload TelcoBridges repository to the system

Upload the ISO file to the "/root" directory of the system with scp or a SFTP tool like FileZilla

Mount the ISO file on the system

Mount the ISO file on your system

1. mkdir -p /repo/centos/7

2. mount -t iso9660 -o loop /root/tb_centos7_x86_64_repo.iso /repo/centos/7

Change TelcoBridges repository file

Edit the TB-Base.repo file

1. vim /etc/yum.repos.d/TB-Base.repo

Change [tb-base] baseurl line to: baseurl=file:///repo/centos/7/os/$basearch/

Update CentOS 7

1. yum clean metadata

2. yum update

Delete ISO file

Since the repository file is quite large, it is better to delete it after the update is complete:

1. rm /root/*repo.iso

Other Links

• Here is a link to upgrade the Telcobridges Linux

• Here is a link to Update a TelcoBridges linux OS without internet access

• Here is a link to Update a CentOS 5 operating system without internet access