DM&P xLinux

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2002/12/31

DM&P xLinux is a reduced Linux package for our user to test and use Linux easily. It is small and fast boot. We can add programs or components our user want.

• xLinux R1
• xLinux R2

What's New on xLinux Release 3

• Loadable module support enabled.
• inetd added to take some of the effort out of running services such as telnet and ftp.
• TELNET service daemon added.
• WU-FTPD service daemon added.

xLinux Release 3 Environment Overview

Setup Files

/boot/linux.img	Linux kernel.
/usr/www	Our web pages are here.
/etc/init.d/rcS	It will be ran first and you can add your initial programs into it. We add statement assign our IP in this file.
/etc/ppp/pap-secrets	User name and password file for PPP dial-up.
/etc/fstab	This file makes it possible to automate the mounting of certain file systems, especially at system start-up.
/etc/ftpaccess	This file controls who gets into the FTP server and how.
/etc/inetd.conf	This is the default configuration file for the inetd (super-server) daemon.
/etc/inittab	This file plays a crucial role in the boot sequence.
/etc/lilo.conf	This file is used by lilo to determine which operating system or kernel to start, as well as to know where to install itself.
/etc/profile	It work as autoexec.bat under DOS and will be run automatically. We start inetd on /etc/profile.
/etc/securetty	This file allows you to specify which TTY devices the root user is allowed to login on.
/etc/services	This file contains information regarding the known services available in the DARPA Internet.

Utilities

Command	Path	Description
insmod	/sbin	Insert module into kernel.
ppp-on	/sbin	Start a ppp connection.
ppp-off	/sbin	Stop a ppp connection.
httpd	/sbin	Start a HTTP server.
dhcpcd	/sbin	Get IP address from DHCP server.
ifconfig	/sbin	Configure a network interface.
fsck.ext2	/sbin	Check and repair a Linux EXT2 file system
lilo	/sbin	Install boot loader.
setserial	/bin	Get/set Linux serial port information.

TinyLogin commands: (refer to http://tinylogin.busybox.net/TinyLogin.html)

Path	Command
/bin	adduser, addgroup, deluser, delgroup, login, su
/sbin	sulogin
/usr/sbin	passwd

Commands listed below are implemented by BusyBox: (You can go to http://www.busybox.net/downloads/BusyBox.html to get more information.)

Path	Command
/bin	cat, chgrp, chmod, chown, cp, date, dd, df, dmesg, echo, false, grep, gunzip, gzip, kill, ln, ls, mkdir, mknod, more, mount, msh, mv, pidof, ping, ps, pwd, rm, rmdir, sed, sh, sleep, sync, tar, touch, true, umount, uname, vi, zcat
/sbin	chat, halt, init, klogd, lsmod, mkswap, modprobe, poweroff, reboot, swapoff, swapon, syslogd
/usr/bin	[, basename, chvt, clear, cut, deallocvt, dirname, du, env, find, free, head, id, killall, logger, reset, sort, tail, telnet, tty, uniq, uptime, wc, which, whoami, xargs, yes
/usr/sbin	chroot

Install Your Program

We put FTP server on our Linux DOC/MDM that you can use FTP to upload your program .The user name is "dmp" and password is "dmp".We recommend you to install Linux(RedHat, Mandrake, SuSE...) on a PC to develop your application. Write and compile your program then upload it to Mity-Mite/Tiny module via FTP to test. You can kill the process if program is not correct .Repeat those steps until program is okay. There is a example:

#!/bin/sh./lcd&
sleep 5
./lcd_time&

chmod +x ./lcd
chmod +x ./lcd_time
chmod +x ./demo

# ps
  PID  Uid     Stat Command
    1 0         S    init
    2 0         S    [keventd]
    3 0         S    [ksoftirqd_CPU0]
    4 0         S    [kswapd]
    5 0         S    [bdflush]
    6 0         S    [kupdated]
   11 0         S    -sh
   14 0         S    ./ftpd
   17 0         S    /usr/httpd/wnsd -p 80
   19 0         S    ./lcd
   21 0         S    ./lcd_time
   22 0         R    ps
# kill 21
# kill 22

[root@/root/grlcd]# ldd lcd
        libstdc++-libc6.2-2.so.3 => /usr/lib/libstdc++-libc6.2-2.so.3 (0x4002c000)
        libm.so.6 =

> /lib/libm.so.6 (0x4006e000)
        libc.so.6 =
        >  /lib/libc.so.6 (0x40090000)
        /lib/ld-linux.so.2 =
        >  /lib/ld-linux.so.2 (0x40000000)
[root@/root/grlcd]#