Before we start, we first list what hardware requirements you need to successfully install Gentoo on your box. This of course depends on your architecture.

Check the following requirements before you continue with the Gentoo installation:

• You need at least 1 Gb of free disk space
• You need at least 300 Mb of memory (RAM + swap)
• For the PowerPC64 architecture, you can install Gentoo/PPC64 on machines having a PowerPC64 microprocessor, including IBM RS/6000s, Power Macintosh G5 systems, IBM pSeries (and soon IBM iSeries) boxen. For a full list go to http://www.linuxppc64.org/hardware.shtml.

Still interested in trying out Gentoo? Well, then it is now time to choose the installation medium you want to use. Yes, you have the choice, no, they are not all equal, and yes, the result is always the same: a Gentoo base system.

The installation media we will describe are:

• Gentoo's Minimal LiveCD for Apple's G5
• Gentoo's Minimal LiveCD for IBM pSeries RS/6000

As you can see there are no Universal CDs at the moment, but they will follow. The consequence of this is that you have to download the stages (see next paragraph) separately.

Gentoo Linux can be installed using one of three stage tarball files. The one you choose depends on how much of the system you want to compile yourself. The stage1 tarball is used when you want to bootstrap and build the entire system from scratch. The stage2 tarball is used for building the entire system from a bootstrapped "semi-compiled" state. The stage3 tarball already contains a basic Gentoo Linux system that has been built for you. As we will explain later, you can also install Gentoo without compiling anything (except your kernel and some optional packages). If you want this, you have to use a stage3 tarball.

Now what stage do you have to choose?

Starting from a stage1 allows you to have total control over the optimization settings and optional build-time functionality that is initially enabled on your system. This makes stage1 installs good for power users who know what they are doing. It is also a great installation method for those who would like to know more about the inner workings of Gentoo Linux.

A stage1 installation can only be performed when you have a working Internet connection.

Stage2 installs allow you to skip the bootstrap process and doing this is fine if you are happy with the optimization settings that we chose for your particular stage2 tarball.

A stage2 installation can only be performed when you have a working Internet connection.

Choosing to go with a stage3 allows for the fastest install of Gentoo Linux, but also means that your base system will have the optimization settings that we chose for you (which to be honest, are good settings and were carefully chosen to enhance performance while maintaining stability). stage3 is also required if you want to install Gentoo using prebuilt packages or without a network connection.

Write down (or remember) what stage you want to use. You need this later when you decide what LiveCD (or other installation medium) you want to use. You might be interested to know that, if you decide to use different optimization settings after having installed Gentoo, you will be able to recompile your entire system with the new optimization settings.

Now take a look at the available installation media.

The Gentoo LiveCDs are bootable CDs which contain a self-sustained Gentoo environment. They allow you to boot Linux from the CD. During the boot process your hardware is detected and the appropriate drivers are loaded. They are maintained by Gentoo developers.

All LiveCDs allow you to boot, setup networking, initialize your partitions and start installing Gentoo from the Internet. However, some LiveCDs also contain all necessary source code so you are able to install Gentoo without a working network configuration.

Now what do these LiveCDs contain?

This is a small, no-nonsense, bootable CD which sole purpose is to boot the system, prepare the networking and continue with the Gentoo installation. It does not contain any stages (or, in some cases, a single stage1 file), source code or precompiled packages. For example the ppc variant of this LiveCD can be found in the universal subdirectory and is called install-ppc-minimal-2004.1.iso.

You have chosen to use a Gentoo LiveCD (if not, then you are reading the wrong section). We'll first start by downloading and burning the chosen LiveCD. We previously discussed the several available LiveCDs, but where can you find them?

Visit one of our mirrors and go to experimental/ppc64/livecd, which is the path where the LiveCD(s) of your choice are located. Inside that directory you'll find so-called ISO-files. Those are full CD images which you can write on a CD-R.

In case you wonder if your downloaded file is corrupted or not, you can check its MD5 checksum and compare it with the MD5 checksum we provide (such as install-ppc64-minimal-2004.2.iso.md5). You can check the MD5 checksum with the md5sum tool under Linux/Unix or md5sum for Windows.

As long as Mac OS X does not support md5sum you have to use the md5 capability of openssl.

$ openssl md5 /path/to/iso
(This could take some time depending on the size of the ISO and your CPU)

Now compare this output with the appropriate file found on the server where you downloaded the ISO (the file will end with .md5). If it is the same, the ISO image downloaded correctly. Be sure you have not mounted it (e.g. with Disk Copy) yet!

More information is available in our Gentoo/PPC FAQ.

To burn the downloaded ISO(s), you have to select raw-burning. How you do this is highly program-dependent. We will discuss cdrecord and k3b here; more information canb be found in our Gentoo FAQ and the Gentoo/PPC FAQ.

• With cdrecord, you simply type cdrecord dev=/dev/hdc (replace /dev/hdc with your CD-RW drive's device path) followed by the path to the ISO file :)
• With K3B, select Tools > CD > Burn Image. Then you can locate your ISO file within the 'Image to Burn' area. Finally click Start.

Place the LiveCD in the CD-ROM and reboot the system. Hold down the 'C' key at bootup (or run an OldWorld bootloader like BootX or quik). You will be greeted by a friendly welcome message and a boot: prompt at the bottom of the screen.

You are also able to tweak some kernel options at this prompt. The following table lists the available boot options you can add:

At this prompt, hit enter, and a complete Gentoo Linux environment will be loaded from the CD. Continue with And When You're Booted....

For pSeries boxes, sometimes the cds might not autoboot. You might have to setup your cdrom as a bootable device in the multi-boot menu. (F1 at startup) The other option is to jump into OF and do it from there:

1) Boot into OF (this is 8 from the serial cons or F8 from a graphics cons, start hitting the key when you see the keyboard mouse etc etc messages

2) run the command 0> boot cdrom:1,yaboot

3) stand back and enjoy!

You will be greeted by a root ("#") prompt on the current console. You can also switch to other consoles by pressing Alt-fn-F2, Alt-fn-F3 and Alt-fn-F4. Get back to the one you started on by pressing Alt-fn-F1.

If you are installing Gentoo on a system with a non-US keyboard, use loadkeys to load the keymap for your keyboard. To list the available keymaps, execute ls /usr/share/keymaps/i386.

(PPC uses x86 keymaps on most systems. The mac/ppc keymaps provided
 on the LiveCD are ADB keymaps and unusable with the LiveCD kernel)
# ls /usr/share/keymaps/i386

Now load the keymap of your choice:

# loadkeys be-latin1

Now continue with Extra Hardware Configuration.

When the Live CD boots, it tries to detect all your hardware devices and loads the appropriate kernel modules to support your hardware. In the vast majority of cases, it does a very good job. However, in some cases (the SPARC LiveCDs don't even do autodetection), it may not auto-load the kernel modules you need. If the PCI auto-detection missed some of your system's hardware, you will have to load the appropriate kernel modules manually.

In the next example we try to load the 8139too module (support for certain kinds of network interfaces):

# modprobe 8139too

If you are an advanced user, you might want to tweak the IDE hard disk performance using hdparm. With the -tT options you can test the performance of your disk (execute it several times to get a more precise impression):

# hdparm -tT /dev/hda

To tweak, you can use any of the following examples (or experiment yourself) which use /dev/hda as disk (substitute with your disk):

Activate DMA:                                       # hdparm -d 1 /dev/hda
Activate DMA + Safe Performance-enhancing Options:  # hdparm -d 1 -A 1 -m 16 -u 1 -a 64 /dev/hda

If you plan on giving other people access to your installation environment or you want to chat using irssi without root privileges (for security reasons), you need to create the necessary user accounts and change the root password.

To change the root password, use the passwd utility:

# passwd
New password: (Enter your new password)
Re-enter password: (Re-enter your password)

To create a user account, we first enter their credentials, followed by its password. We use useradd and passwd for these tasks. In the next example, we create a user called "john".

# useradd john
# passwd john
New password: (Enter john's password)
Re-enter password: (Re-enter john's password)

You can change your user id from root to the newly created user by using su:

# su john -

If you want to allow other users to access your computer during the Gentoo installation (perhaps because those users are going to help you install Gentoo, or even do it for you), you need to create a user account for them and perhaps even provide them with your root password (only do that if you fully trust that user).

To fire up the SSH daemon, execute the following command:

# /etc/init.d/sshd start

To be able to use sshd, you first need to setup your networking. Continue with the chapter on Configuring your Network.