node: /lib64/libc.so.6: version `GLIBC_2.9' not found (required by node)

I'm trying to run a software etherpad. When I run the ./run.sh it is giving me error

node: /lib64/libc.so.6: version `GLIBC_2.9' not found (required by node)
node: /lib64/libc.so.6: version `GLIBC_2.6' not found (required by node)
node: /lib64/libc.so.6: version `GLIBC_2.7' not found (required by node)
node: /lib64/libc.so.6: version `GLIBC_2.9' not found (required by node)
node: /lib64/libc.so.6: version `GLIBC_2.6' not found (required by node)
node: /lib64/libc.so.6: version `GLIBC_2.7' not found (required by node)
Ensure that all dependencies are up to date...  If this is the first time you have run Etherpad please be patient.
node: /lib64/libc.so.6: version `GLIBC_2.9' not found (required by node)
node: /lib64/libc.so.6: version `GLIBC_2.6' not found (required by node)
node: /lib64/libc.so.6: version `GLIBC_2.7' not found (required by node)

I have installed Python 2.7

What am I missing here?

What am I missing here.

The program you are trying to run was built on a system with GLIBC 2.9 (or above).

You are trying to run that program on a system that has GLIBC 2.5 (or older). That will not work: UNIX systems support backward compatibility (old executables continue to run on newer systems), but not the inverse: binaries built on new systems do not (generally) run on older ones.

I have installed Python 2.7

Python has nothing to do with your problem.

Try either installing an older version of [node] or compiling it for yourself.

You confusion about python27 is understandable because many ./configure scripts are python.