libc.so.6: version `GLIBC_2.14' not found

Solution 1:

You don't have a high enough version of libc6, that is causing the error.

From How to fix “/lib/x86_64-linux-gnu/libc.so.6: version `GLIBC_2.14' not found”? – Super User:

That means the program was compiled against glibc version 2.14, and it requires that version to run, but your system has an older version installed. You'll need to either recompile the program against the version of glibc that's on your system, or install a newer version of glibc (the "libc6" package in Debian).

So, you just need to upgrade your libc6 package. All versions of Ubuntu have at least version 2.15 because it's a faily important package (reference).

To upgrade it, use these commands in a terminal:

sudo apt-get update
sudo apt-get install libc6

Solution 2:

For the benefit of those like me who are only experiencing this issue in one particular directory;

In my case there was a shared library file in my directory that was somehow throwing off the OS. I opened the folder in a file explorer, sorted by 'mime type' then deleted files of the type 'sharedlib' (or application/x-sharedlib) until my command (ls) worked again without that error. In my case the shared library file at fault was named 'libc.so.6'.