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Fixes ldlinux.c32 Bug and Compiling Errors

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The old way of creating the image used to require the user to manually add Syslinux Features like isolinux.bin and ldlinux.c32, which without them, the system wouldn't boot. Now the small instruction guide will move the required files with the Kernel and Rootfs. Also fixed a small user error when generating the Rootfs by changing "find . | cpio -R +0:+0 -H newc -o | gzip > ../../rootfs.cpio.gz" to "find . | cpio -R root:root -H newc -o | gzip > ../../rootfs.cpio.gz"
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AwlsomeAlex 2016-09-30 23:38:19 -04:00 committed by GitHub
parent d2b2366cf6
commit 2c52814722
1 changed files with 26 additions and 5 deletions
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README.md
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@ -7,10 +7,13 @@ The script below uses **Linux kernel 4.7.2** and **BusyBox 1.24.2**. The source
After that simply run the below script. It doesn't require root privileges. In the end you should have a bootable ISO image named `minimal_linux_live.iso` in the same directory where you executed the script. After that simply run the below script. It doesn't require root privileges. In the end you should have a bootable ISO image named `minimal_linux_live.iso` in the same directory where you executed the script.
wget http://kernel.org/pub/linux/kernel/v4.x/linux-4.7.2.tar.xz wget http://kernel.org/pub/linux/kernel/v4.x/linux-4.7.6.tar.xz
wget http://busybox.net/downloads/busybox-1.24.2.tar.bz2 wget http://busybox.net/downloads/busybox-1.24.2.tar.bz2
tar -xvf linux-4.7.2.tar.xz wget http://kernel.org/pub/linux/utils/boot/syslinux/syslinux-6.03.tar.xz
mkdir isoimage
tar -xvf linux-4.7.6.tar.xz
tar -xvf busybox-1.24.2.tar.bz2 tar -xvf busybox-1.24.2.tar.bz2
tar -xvf syslinux-6.03.tar.xz
cd busybox-1.24.2 cd busybox-1.24.2
make distclean defconfig make distclean defconfig
sed -i "s/.*CONFIG_STATIC.*/CONFIG_STATIC=y/" .config sed -i "s/.*CONFIG_STATIC.*/CONFIG_STATIC=y/" .config
@ -26,10 +29,28 @@ After that simply run the below script. It doesn't require root privileges. In t
echo 'setsid cttyhack /bin/sh' >> init echo 'setsid cttyhack /bin/sh' >> init
chmod +x init chmod +x init
find . | cpio -R root:root -H newc -o | gzip > ../../rootfs.cpio.gz find . | cpio -R root:root -H newc -o | gzip > ../../rootfs.cpio.gz
cd ../../linux-4.7.2 cd ../../linux-4.7.6
make mrproper defconfig bzImage make mrproper defconfig bzImage
make isoimage FDINITRD=../rootfs.cpio.gz cp arch/x86/boot/bzImage \
cp arch/x86/boot/image.iso ../minimal_linux_live.iso ../isoimage/kernel
cd .. cd ..
cd isoimage
cp ../syslinux-6.03/bios/core/isolinux.bin .
cp ../syslinux-6.03/bios/com32/elflink/ldlinux/ldlinux.c32 .
cp kernel ./kernel.xz
cp ../rootfs.cpio.xz ./rootfs.xz
echo 'default kernel.xz initrd=rootfs.xz vga=ask' > ./isolinux.cfg
genisoimage \
-J \
-r \
-o ../minimal_linux_live.iso \
-b isolinux.bin \
-c boot.cat \
-input-charset UTF-8 \
-no-emul-boot \
-boot-load-size 4 \
-boot-info-table \
./
isohybrid -u ../minimal_linux_live.iso 2>/dev/null || true
Note that this produces very small live Linux OS with working shell only. The network support has been implemented properly in the [Minimal Linux Live](http://github.com/ivandavidov/minimal) project which is extensively documented and more feature rich, yet still produces very small live Linux ISO image. Note that this produces very small live Linux OS with working shell only. The network support has been implemented properly in the [Minimal Linux Live](http://github.com/ivandavidov/minimal) project which is extensively documented and more feature rich, yet still produces very small live Linux ISO image.