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Ivan Davidov 2016-06-12 14:01:46 +03:00 committed by GitHub
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# Minimal Linux Script # Minimal Linux Script
One script which generates fully functional live Linux ISO image with minimal effort. This is based on the first published version of [Minimal Linux Live](http://github.com/ivandavidov/minimal). All comments and empty lines have been removed and the original script code has been slightly altered to reduce the overall script length. One script which generates fully functional live Linux ISO image with minimal effort. This is based on the first published version of [Minimal Linux Live](http://github.com/ivandavidov/minimal). All comments and empty lines have been removed and the original script code has been modified to reduce the overall script length.
The script below uses **Linux kernel 3.15.6** and **BusyBox 1.22.1**. The source bundles are downloaded and compiled automatically. If you are using [Ubuntu](http://ubuntu.com) or [Linux Mint](http://linuxmint.com), you should be able to resolve all build dependencies by executing the following command: The script below uses **Linux kernel 4.6.2** and **BusyBox 1.24.2**. The source bundles are downloaded and compiled automatically. If you are using [Ubuntu](http://ubuntu.com) or [Linux Mint](http://linuxmint.com), you should be able to resolve all build dependencies by executing the following command:
sudo apt-get install wget bc build-essential gawk syslinux genisoimage sudo apt-get install wget bc build-essential gawk syslinux genisoimage
@ -11,19 +11,19 @@ After that simply run the below script. It doesn't require root privileges. In t
mkdir work mkdir work
cd work cd work
rm -f linux-3.15.6.tar.xz rm -f linux-3.15.6.tar.xz
wget http://kernel.org/pub/linux/kernel/v3.x/linux-3.15.6.tar.xz wget http://kernel.org/pub/linux/kernel/v4.x/linux-4.6.2.tar.xz
rm -rf kernel rm -rf kernel
mkdir kernel mkdir kernel
tar -xvf linux-3.15.6.tar.xz -C kernel tar -xvf linux-4.6.2.tar.xz -C kernel
cd kernel/linux-3.15.6 cd kernel/linux-4.6.2
make clean defconfig vmlinux make clean defconfig vmlinux
cd ../.. cd ../..
rm -f busybox-1.22.1.tar.bz2 rm -f busybox-1.24.2.tar.bz2
wget http://busybox.net/downloads/busybox-1.22.1.tar.bz2 wget http://busybox.net/downloads/busybox-1.24.2.tar.bz2
rm -rf busybox rm -rf busybox
mkdir busybox mkdir busybox
tar -xvf busybox-1.22.1.tar.bz2 -C busybox tar -xvf busybox-1.24.2.tar.bz2 -C busybox
cd busybox/busybox-1.22.1 cd busybox/busybox-1.24.2
make clean defconfig make clean defconfig
sed -i "s/.*CONFIG_STATIC.*/CONFIG_STATIC=y/" .config sed -i "s/.*CONFIG_STATIC.*/CONFIG_STATIC=y/" .config
make busybox install make busybox install
@ -31,35 +31,21 @@ After that simply run the below script. It doesn't require root privileges. In t
cp -R _install ../../rootfs cp -R _install ../../rootfs
cd ../../rootfs cd ../../rootfs
rm -f linuxrc rm -f linuxrc
mkdir dev etc proc sys tmp mkdir dev proc sys
cd etc
echo > welcome.txt
echo ' #####################################' >> welcome.txt
echo ' # #' >> welcome.txt
echo ' # Welcome to "Minimal Linux Live" #' >> welcome.txt
echo ' # #' >> welcome.txt
echo ' #####################################' >> welcome.txt
echo >> welcome.txt
cd ..
echo '#!/bin/sh' > init echo '#!/bin/sh' > init
echo 'dmesg -n 1' >> init echo 'dmesg -n 1' >> init
echo 'mount -t devtmpfs none /dev' >> init echo 'mount -t devtmpfs none /dev' >> init
echo 'mount -t proc none /proc' >> init echo 'mount -t proc none /proc' >> init
echo 'mount -t sysfs none /sys' >> init echo 'mount -t sysfs none /sys' >> init
echo 'cat /etc/welcome.txt' >> init echo 'setsid cttyhack /bin/sh' >> init
echo 'while true' >> init
echo 'do' >> init
echo ' setsid cttyhack /bin/sh' >> init
echo 'done' >> init
echo >> init
chmod +x init chmod +x init
rm -f ../rootfs.cpio.gz rm -f ../rootfs.cpio.gz
cd ../rootfs cd ../rootfs
find . | cpio -H newc -o | gzip > ../rootfs.cpio.gz find . | cpio -H newc -o | gzip > ../rootfs.cpio.gz
rm -f ../../minimal_linux_live.iso rm -f ../../minimal_linux_live.iso
cd ../kernel/linux-3.15.6 cd ../kernel/linux-4.6.2
make isoimage FDINITRD=../../rootfs.cpio.gz make isoimage FDINITRD=../../rootfs.cpio.gz
cp arch/x86/boot/image.iso ../../../minimal_linux_live.iso cp arch/x86/boot/image.iso ../../../minimal_linux_live.iso
cd ../../.. cd ../../..
Note that this produces very small live Linux OS with working shell and no proper network support. 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.