project: d.r.e.a.m

This documentation is no longer maintained. It may be out of date, or simply wrong. I will leave it online, as long as it think it may still be useful.

Install CRUX into an UML

A short and dense HOWTO for installing CRUX into an UML

• Get UML Kernel and utilities, install them
  • fetch linux-2.4.20.tar.bz2 (or gz)
  • untar it (to your homedir)
  • chdir to it
  • fetch uml patch for your kernel
  • bzcat uml-patch-2.4.20-1.bz2 | patch -p1
  • make ARCH=um menuconfig
    you can also use make ARCH=um {x,}config
    be sure to enable tmpfs here!
  • make ARCH=um dep linux
  • sudo cp linux /usr/local/bin
  • fetch and install uml_tools
    make
    sudo make install
• Fetch CRUX iso image and docs
• Create Block Device for UML root fs
  dd if=/dev/zero of=root_fs bs=10M count=100
  1000MiB is a good size for the start
• Boot and install CRUX
  linux mem=192m ubd0=crux-1.0.iso ubd1=root_fs
• Follow the CRUX main documentation, leave away kernel compilation, bootloader installation
• Shutdown the uml, after finishing installation so far (CRUX base installed)
• Create a tun/tap device for communication with the net: (on the host)
  
  • sudo tunctl -u 1000 # replace 1000 with your own user id
  • sudo ifconfig tapX 1.2.3.4 netmask 255.255.255.255 up
  • sudo ip ro add 1.2.3.5/32 dev tapX # this is going to be the adress of your uml
  • sudo sysctl -w net.ipv4.ip_forward=1
  • sudo sysctl -w net.ipv4.conf.default.proxy_arp=1
  • sudo sysctl -w net.ipv4.conf.all.proxy_arp=1
  • chmod 666 /dev/net/tun
• boot into your fresh CRUX install
  linux ubd0=root_fs eth0=tuntap,tapX
• Finish network setup (edit /etc/rc.d/net, /etc/resolv.conf)
• enjoy