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How to fix the following issue and what's the underlying problem? Due to this problem, everything that uses python is not working.

/lib/librt.so.1: symbol
pthread_barrier_wait, version
GLIBC_2.2 not defined in file
libpthread.so.0 with link time
reference

Please install a package which
provides this module, or verify that
the module is installed correctly.     

It's possible that the above module
doesn't match the current version of
Python, which is:
2.6.2 (r262:71600, Aug 21 2009, 12:22:21)  [GCC 4.4.1 20090818 (Red
Hat 4.4.1-6)]
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up vote 0 down vote accepted

The problem is with grub2 installation. System reboot solved the problem.

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