- Navigate to the Centos Mirror.
- Select your architecture (i386 for 32bit, x86_64 for 64bit)
- Click the Packages link
- Download the rpm-libs-4.8.0-55.el6.[arch].rpm package.
- cd to the root directory
cd /
- Unpack the rpm using:
sudo rpm2cpio /path/to/rpm-libs-4.8.0-55.el6.[arch].rpm | cpio -idmv
This will unpack and install 3 libraries and 3 symlinks in the package to where they belong.
If you are more cautious, unpack them to a working directory and manually move them over, paying strict attention to syslinks and permissions.
On my system (Centos 6.7, x86_64) the packages are in /usr/lib64 with the following permissions:
lrwxrwxrwx. 1 root root 20 Oct 24 20:13 librpmbuild.so.1 -> librpmbuild.so.1.0.0
-rwxr-xr-x. 1 root root 155344 May 10 2016 librpmbuild.so.1.0.0
lrwxrwxrwx. 1 root root 17 Oct 24 20:13 librpmio.so.1 -> librpmio.so.1.0.0
-rwxr-xr-x. 1 root root 183968 May 10 2016 librpmio.so.1.0.0
lrwxrwxrwx. 1 root root 15 Oct 24 20:13 librpm.so.1 -> librpm.so.1.0.0
-rwxr-xr-x. 1 root root 435496 May 10 2016 librpm.so.1.0.0