What are the main differences between RHEL4 & RHEL5 and RHEL 6
#########RHEL4 and RHEL 5 ######################## XEN, YUM and improved SELinux all the features updated with better options Better GUI support then RHEL4 YUM over RPM package management IPTables and SELinux for more secure environment ext2 & ext3 file system In RHEL 4 SELinux Block only 13 services, But on RHEL 5 SElinux Block 80 services ############################################### Difference between RHEL 4 and RHEL 5 : 1) In RHEL 4 SELinux Block only 13 services, But on RHEL 5 SElinux Block 80 services. 2) RHEL 4 have ext2 filesystem, but RHEL 5 we have ext3 filesystem that support Journal. 3) RHEL 4 have no virtualization Feature, but in RHEL 5 we have virtualization with Hypervisor-V. 4) In RHEL 4 we have no Yum, But in RHEL 5 we have Yum available. #####################################################