mirror of
git://slackware.nl/current.git
synced 2024-12-28 09:59:53 +01:00
668a929acf
a/gptfdisk-1.0.9-x86_64-2.txz: Rebuilt. Applied upstream patches to fix a crash and partition corruption caused by the popt upgrade: [PATCH] Updated guid.cc to deal with minor change in libuuid [PATCH] Fix failure & crash of sgdisk when compiled with latest popt [PATCH] Fix NULL dereference when duplicating string argument Thanks to jloco. d/cmake-3.25.1-x86_64-1.txz: Upgraded. kde/calligra-3.2.1-x86_64-24.txz: Rebuilt. Recompiled against poppler-22.12.0. kde/cantor-22.08.3-x86_64-2.txz: Rebuilt. Recompiled against poppler-22.12.0. kde/kfilemetadata-5.100.0-x86_64-2.txz: Rebuilt. Recompiled against poppler-22.12.0. kde/kile-2.9.93-x86_64-22.txz: Rebuilt. Recompiled against poppler-22.12.0. kde/kitinerary-22.08.3-x86_64-2.txz: Rebuilt. Recompiled against poppler-22.12.0. kde/krita-5.1.3-x86_64-2.txz: Rebuilt. Recompiled against poppler-22.12.0. kde/okular-22.08.3-x86_64-2.txz: Rebuilt. Recompiled against poppler-22.12.0. l/glib2-2.74.3-x86_64-1.txz: Upgraded. l/poppler-22.12.0-x86_64-1.txz: Upgraded. Shared library .so-version bump. n/NetworkManager-1.40.6-x86_64-1.txz: Upgraded. xap/NetworkManager-openvpn-1.10.2-x86_64-1.txz: Upgraded. xap/libnma-1.10.4-x86_64-1.txz: Upgraded. xap/network-manager-applet-1.30.0-x86_64-1.txz: Upgraded.
99 lines
3.7 KiB
Text
99 lines
3.7 KiB
Text
|
|
Slackware initrd mini HOWTO
|
|
by Patrick Volkerding, volkerdi@slackware.com
|
|
@DATE@
|
|
|
|
This document describes how to create and install an initrd, which may be
|
|
required to use some features of the kernel. Also see "man mkinitrd".
|
|
|
|
1. What is an initrd?
|
|
2. Why do I need an initrd?
|
|
3. How do I build the initrd?
|
|
4. Now that I've built an initrd, how do I use it?
|
|
|
|
|
|
1. What is an initrd?
|
|
|
|
Initrd stands for "initial ramdisk". An initial ramdisk is a very small
|
|
Linux filesystem that is loaded into RAM and mounted as the kernel boots,
|
|
and before the main root filesystem is mounted.
|
|
|
|
2. Why do I need an initrd?
|
|
|
|
The usual reason to use an initrd is because you need to load kernel
|
|
modules before mounting the root partition. Usually these modules are
|
|
required to support the filesystem used by the root partition (ext3,
|
|
reiserfs, xfs), or perhaps the controller that the hard drive is attached
|
|
to (SCSI, RAID, etc). Essentially, there are so many different options
|
|
available in modern Linux kernels that it isn't practical to try to ship
|
|
many different kernels to try to cover everyone's needs. It's a lot more
|
|
flexible to ship a generic kernel and a set of kernel modules for it.
|
|
|
|
3. How do I build the initrd?
|
|
|
|
The easiest way to make the initrd is to use the mkinitrd script included
|
|
in Slackware's mkinitrd package. We'll walk through the process of
|
|
upgrading to the generic @KERNEL_VERSION@ Linux kernel using the packages
|
|
found in Slackware's slackware/a/ directory.
|
|
|
|
First, make sure the kernel, kernel modules, and mkinitrd package are
|
|
installed (the current version numbers might be a little different, so
|
|
this is just an example):
|
|
|
|
installpkg kernel-generic-@KERNEL_VERSION@-@ARCH@-@BUILD@.tgz
|
|
installpkg kernel-modules-@KERNEL_VERSION@-@ARCH@-@BUILD@.tgz
|
|
installpkg mkinitrd-@MKINITRD_VERSION@-@ARCH@-@BUILD@.tgz
|
|
|
|
Change into the /boot directory:
|
|
|
|
cd /boot
|
|
|
|
Now you'll want to run "mkinitrd". I'm using ext4 for my root
|
|
filesystem, and since mkinitrd should figure out any other modules
|
|
it requires, I shouldn't need to specify any others:
|
|
|
|
mkinitrd -c -k @KERNEL_VERSION@ -m ext4
|
|
|
|
This should do two things. First, it will create a directory
|
|
/boot/initrd-tree containing the initrd's filesystem. Then it will
|
|
create an initrd (/boot/initrd.gz) from this tree. If you wanted to,
|
|
you could make some additional changes in /boot/initrd-tree/ and
|
|
then run mkinitrd again without options to rebuild the image. That's
|
|
optional, though, and only advanced users will need to think about that.
|
|
|
|
Here's another example: Build an initrd image using Linux @KERNEL_VERSION@
|
|
kernel modules for a system with an ext3 root partition on /dev/sdb3:
|
|
|
|
mkinitrd -c -k @KERNEL_VERSION@ -m ext3 -f ext3 -r /dev/sdb3
|
|
|
|
|
|
4. Now that I've built an initrd, how do I use it?
|
|
|
|
Now that you've got an initrd (/boot/initrd.gz), you'll want to load
|
|
it along with the kernel at boot time. If you use LILO for your boot
|
|
loader you'll need to edit /etc/lilo.conf and add a line to load the
|
|
initrd. Here's an example section of lilo.conf showing how this is
|
|
done:
|
|
|
|
# Linux bootable partition config begins
|
|
image = /boot/vmlinuz-generic-@KERNEL_VERSION@
|
|
initrd = /boot/initrd.gz
|
|
root = /dev/sda6
|
|
label = @LILO_KERNEL_NAME@
|
|
read-only
|
|
# Linux bootable partition config ends
|
|
|
|
The initrd is loaded by the "initrd = /boot/initrd.gz" line.
|
|
Just add the line right below the line for the kernel image you use.
|
|
Save the file, and then run LILO again ('lilo' at the command line).
|
|
You'll need to run lilo every time you edit lilo.conf or rebuild the
|
|
initrd.
|
|
|
|
Other bootloaders such as syslinux also support the use of an initrd.
|
|
See the documentation for those programs for details on using an
|
|
initrd with them.
|
|
|
|
|
|
---------
|
|
|
|
Have fun!
|