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Correcting a typo pointed out in the earlier post today. |
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This revision makes 2 changes... |
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A) The removal of udev is now standard instead of optional. udev-181 |
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and higher will be pulling in kmod, and anything else that kmod depends |
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on. Removing udev will avoid unnecessary cruft on your machine. |
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B) Splitting up step 3) into 3a) and 3b) for greater clarity as |
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requested in user feedback. |
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The usual warnings apply... |
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* this is a beta |
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* use a spare test machine |
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* if you don't follow the instructions correctly, the result might be |
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an unbootable linux |
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* even if you do follow instructions, the result might be an unbootable |
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linux |
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1) Set up your kernel to support and automount a devtmpfs filesystem at |
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/dev |
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* If you prefer to edit .config directly, set |
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CONFIG_DEVTMPFS=y and CONFIG_DEVTMPFS_MOUNT=y |
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* If you prefer "make menuconfig", the route is as shown below. Note |
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that the "Autount devtmpfs..." option won't appear until you enable |
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"Maintain a devtmpf..." option. |
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make menuconfig |
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Device Drivers ---> |
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Generic Driver Options ---> |
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[*] Maintain a devtmpfs filesystem to mount at /dev |
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[*] Automount devtmpfs at /dev, after the kernel mounted the rootfs |
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Once you've made the changes, rebuild the kernel. |
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2) Set up for emerging busybox. busybox requires the "mdev" flag in |
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this situation. The "static" flag is probably also a good idea. In |
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file /etc/portage/package.use add the line |
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sys-apps/busybox static mdev |
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Now, "emerge busybox" |
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3 a) Create /sbin/linuxrc containing at least |
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#!/bin/busybox ash |
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mount -t proc proc /proc |
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mount -t sysfs sysfs /sys |
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exec /sbin/init |
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This should be enough for most users. If you have an unusual setup, |
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you may need additional stuff in there. Remember to |
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"chmod 744 /sbin/linuxrc" to make it executable. |
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In the bootloader "append" line, include "init=/sbin/linuxrc". If |
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you're using lilo remember to re-run lilo to implement the changes. If |
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you're using another bootloader, make the equivalant initialization. |
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4) Remove udev from the services list, and replace it with mdev. Type |
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the following 2 commands at the command line |
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rc-update del udev sysinit |
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rc-update add mdev sysinit |
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5) reboot to your new kernel. You're now running without using udev. |
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6) Remove udev as per the following instructions... |
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* execute the following command at the commandline |
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emerge --unmerge sys-fs/udev |
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* In file /etc/portage/package.mask, append the line |
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sys-fs/udev |
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Create the file if it doesn't already exist. You now have a totally |
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udev-free machine |
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|
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-- |
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Walter Dnes <waltdnes@××××××××.org> |
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