How to Check the glibc (GNU libc) Version on CentOS 6 and CentOS 7

Using ldd

ldd --version

This should return a result similar to:

ldd (GNU libc) 2.17
Copyright (C) 2012 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
Written by Roland McGrath and Ulrich Drepper.

In this case, version 2.17 is installed.

Using yum

yum list glibc

This should return a result similar to:

Loaded plugins: fastestmirror, langpacks, priorities
Loading mirror speeds from cached hostfile
3 packages excluded due to repository priority protections
Installed Packages
glibc.x86_64        2.17-55.el7_0.3          @system-updates-released
Available Packages
glibc.i686          2.17-55.el7_0.3          system-updates-released

In this case, 2.17-55.el7_0.3 is the package installed.

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