COMP 3000 2011 Report: ttian1

Background The name of the distribution I choose is CRUX. It is a lightweight, i686-optimized Linux distribution. It is delivered by a tar.gz-based package system with BSD-style initscripts and also utilizes a ports system to install and upgrade applications. Unlike other distributions, the primary goal of CRUX is not to be popular or to put as many features as possible into the system. In fact, CRUX is targeted at experienced Linux users especially. CRUX is first created by Per Liden (found through wikipedia) and the project has grown into a reasonable team whose members are all volunteers sharing a common philosophy(found through http://crux.nu/Main/About). The team provides the core and optional packages for CRUX. The crux-2.7.iso file is 226 MB. However after installed, it will become 1.3GB and even more which depends on the ports and packages user want to install. CRUX is derived from GNU/LINUX. I use VMware to run Crux with its iso file. And my setting is as blow.

________________________________________________________________________________________________________________________________________________

Installation/Startup Attention: My installation and basic operation are together, as CRUX is so special a OS that for experienced users with only shell interface. It looks like the shell after we run putty.exe in the laboratory. After I run the iso file through VMware, it shows me interface which looks like the scs.lambda machine--- a shell with command line. And then I follow the handbook provided by the crux.nu. After I login as root, the first thing I need to do is to partition my hard disk( the virtual one in fact). At first I use “fdisk /dev/sda” command to do partition, but I get a bad partition table and I can not mount my partition.

As a result, I use “cfdisk /dev/sda” command instead the old one, and I get a good partition table. After that, I use “mkfs.ext4 /dev/sda1” command to build my file system. Then I use “mount /dev/sda1 /mnt” to mount my sda1 partition, so I can do with sda1. After that I use “mkdir /mnt/var” command to make that directory which is for the later installation. Then I use “mount /dev/sda1 /mnt/var” command to mount the “var” directory. Then I use “setup” command to go into the CRUX setup windows to start the package installation script.

After the setup, I need to do some other work to compile my kernel. I use the following commands:

Mount --bind /dev /mnt/dev
Mount --bind /tmp /mnt/tmp

//Attention: the bind option for Mount command make the first parameter of the arguments inherits the properties of the second parameter.

Mount –t proc proc /mnt/proc
Mount –t sysfs none /mnt/sys
Chroot /mnt /bin/bash

//Attention: Chroot to change root for current running processes. Then initiate the password by using command “passwd”. Then use vim to edit files such as fstab, rc.conf, /rc.d/net and so on.

Then goes to the /usr/src/linux-2.5.35.6 directory to make instal. Using command:

Cd /usr/src/linux-2.6.35.6
Make menuconfig --------//go into a configure script
Make all

After install a lot of files, input “make modules_install” for another installation.

Cp arch/x86/boot/bzImage /boot/vmlinuz
cd System.map /boot

And at last, edit the /etc/lilo.conf to boot the kernel I have just compiled and then run lilo to make the new system bootable. I do learn a lot through the installation. 1. Because I use a virtual machine to run Crux, the label of the disk is sda, rather than hda. 2. Sometimes there are more than one way to do the same one thing in Linux, but one or more of them may never work well and meet kinds of problems such as “permission denied”. If so, just use other method and it may work well. For example, the partition in my distribution. 3. Learn quite a lot of commands and much familiar with the shell(bash) than before. 4. When download software which provides md5, check it before install to make sure it is the right one. 5. Os works on their corresponding CPU, such as x86 and i686. 6. Familiar with command “which” and “whereis”, as the command line does not show the directory. 7. Cat command is very useful to view files. And vim is so powerful that I can use it to edit system files. And I think that is very dangerous. 8. Chmod 777 * is dangerous but useful sometimes. 9. Learn about the “mount”, “swapon” command and so on.

________________________________________________________________________________________________________________________________________________ Usage Evaluation From my point of view, as I am a fresh man to Linux, CRUX is really quite targeted to experienced users. Just as the developer says, I do have to do almost everything by myself by using the shell, even compile my own kernel! And the command line is only the “#” symbol, rather than shows almost the full directory in other distribution of Linux such as Ubuntu. So I have to be very familiar with the directory commands and clearly know what I am doing and where I am, or I have to use “cd ..” command to go back to top directory and go into the directory I want a again and that makes me think that the CRUX is not very user friendly. However, as one of the features of CRUX, it really makes the screen “light and clean”. Another feature of CRUX is its ports system, and it makes it much easier to install and update package. CRUX does not contain the gcc C compiler. And it does not install KDE automatically, so the UI looks like the lambda machine we use at laboratory. And I think using Crux is much more difficult than using Ubuntu. At last, I want to say that I choose Crux because it sounds cool and it is a lightweight distribution of Linux. Though it really takes me a lot of time to do with and be familiar with it, I love this distribution because it forces me to learn much more about Linux from the surface to the kernel.

________________________________________________________________________________________________________________________________________________

Reference: Handbook for CRUX: http://crux.nu/Main/HomePage More information about CRUX such as the author:http://en.wikipedia.org/wiki/CRUX