> First: Old distributions, such as RedHat 6.1 or SuSe 5.3, I think, used libc. > Actually version 5. This version should not be in use, in newer distributions, > and should you find it some where, it is for compatibility reasons. That should be Redhat 5.1 which uses libc5. RedHat 6.1 is the most recent version of RedHat and uses glibc 2.1. Ciao, Gordon