Replace the FedoraCore6 kernel-general Linux technology-Linux programming and kernel information. For more information, see the following. The i586 kernel is installed by default in the first Fedora Core 6 version. The i586 kernel has many drawbacks. For example, problems may occur when installing the nvidia graphics card driver, and the performance of the processor cannot be fully utilized.
First, let's briefly explain the differences and relationships between i386, i586, and i686. In fact, they all belong to the compatible processor category of the x86 architecture, including amd cpu, horizontal is relative to arm, powerpc and other processor architectures, vertical is backward compatible, it's just a new processor. I386 mainly refers to the old 386 machines, also refers to the IA32 system CPU (32 bits Intel Architecture), i586 refers to the Pentium, AMD K6 level CPU, i686 indicates the CPU of Pentium 2/3/4, K7, and above. Because these CPUs are vertically backward compatible, the i686 CPU is compatible with the instruction set of the i586 machine, so it can run the i586 kernel. However, it is clear that this does not play the best performance of the processor.
The following describes how to upgrade the i586 kernel to the i686 kernel. Note that the command "yum update kernel" cannot be used, because update only upgrades the kernel to a later version, but does not change the kernel architecture. After switching to the root permission:
(1) first check whether the kernel version is i586 or i686. Run the "arch" command to view the kernel architecture. You can also run the "yum list kernel" command to view the currently installed kernel and the kernel information that can be upgraded and installed. If the kernel is already i686, you do not have to proceed with the following steps.
(2) install yumdownloader, which is part of yum-utils. Run the following command to install it:
Yum-y install yum-utils
(3) download the i686 kernel installation package.
Yumdownloader kernel. i686
(4) install the downloaded i686 kernel installation package. There are two cases (generally the first one ):
(A) If the i686 kernel version is later than the current kernel version, run the following command: rpm-ivh kernel-2 *. i686.rpm
(B) If the i686 kernel version is the same as the current i586 version, run the following command: rpm-ivh -- replacefiles -- replacepkgs kernel-2 *. i686.rpm
(5) If the kernel has been installed, check/etc/grub. conf or/boot/grub. in the conf file, you will find an extra startup option for the newly installed i686 kernel in the Startup menu. Restart the machine and enter the i686 kernel system.
In this way, the new i686 kernel is installed. This is a safe installation method and does not affect the old i586 kernel. If it is found that the new i686 kernel cannot be used normally, you can also enter the original i586 kernel. If the i686 kernel is used stably, the previous i586 kernel can be detached and only the new i686 kernel can be retained.
How do I find that the desktop becomes KDE after I start to enter the i686 kernel? In addition, you cannot switch back to the original GNOME Desktop. You cannot find the GNOME Desktop selection option in the switchdesk-gui tool. (You can run the "yum-y install switchdesk-gui" command to install the package ). Don't worry. This is because some GNOME functions are dependent on the i686 kernel. Run the following command to install the following software packages:
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