To discover which kind of system you have, (remember, these instructions
are for x86 based Linux only): ls -l /lib/libc.so.* What you are looking
for is lines of the form /lib/libc.so.<num> If all you see are lines where
<num> is 5, then you have libc5. If you
have a line where <num> is 6, then you have glibc, and you should get the
glibc version. An additional check is to look in /lib for libdl.so.<num>:
if at least one <num> here is 2, then you definitely have a glibc system.
rpm -q glibc
You will get glibc version number.