Top 10 Red Hat Enterprise Linux 5 Security Checks | UpGuard

This document presents a 10-step hardening checklist for Red Hat Enterprise Linux 5 to strengthen system security, including separating user-writable partitions, using nosuid/nodev/noexec mount options, disabling boot from removable media, setting a GRUB password, replacing yum-updatesd with cron-based updates, removing X Windows, mounting /boot as read-only, restricting SSH (Protocol 2, no root login, AllowGroups), disabling unnecessary services, and requiring the root password for single-user mode.