Oracle Database Error Solutions & DBA Guide

Error in Invoking Target 'agent nmhs' of Makefile During Oracle Database 11.2.0.4 Installation on Oracle Linux 7 📅 Last Updated: August 2026 This guide has been fully updated for Oracle Database 11.2.0.4 installations on Oracle Linux 7. It explains the causes of the "Error in invoking target 'agent nmhs' of makefile" installation failure, how to analyze Oracle installation logs, understand the linker error, apply the recommended workaround, and follow Oracle best practices to complete the installation successfully. Oracle Database 11.2.0.4 remains widely deployed in enterprise environments because of long-term application compatibility and legacy system requirements. During installation on Oracle Linux 7 or Red Hat Enterprise Linux 7, administrators may encounter a compilation failure while Oracle Universal Installer (OUI) attempts to build Enterprise Manager components. The installation usually stops during the linking phase with the f...

How to Change the Boot Sequence of Oracle Linux 7 (Complete Enterprise GRUB2 Administration Guide) 📅 Last Updated: August 2026 This guide has been completely updated for Oracle Linux 7 and covers the proper enterprise methods for changing the default boot sequence using GRUB2 . It explains the Oracle Linux boot process, BIOS versus UEFI boot modes, Unbreakable Enterprise Kernel (UEK), Red Hat Compatible Kernel (RHCK), kernel management utilities, and enterprise best practices for safely changing the default boot entry. Oracle Linux uses the GRUB2 (GRand Unified Bootloader version 2) bootloader to load the operating system during startup. Every installed kernel appears as a boot menu entry, allowing administrators to select which kernel should start automatically. After installing a new kernel, upgrading Oracle Linux, testing kernel patches, installing the Oracle Unbreakable Enterprise Kernel (UEK), or troubleshooting boot problems, administrators often need to c...