LỜi cảm tạ /small> MỤc lụC

IX. Dịch vụ Send Mail:

1. Mục đích:

II. Các ưu, nhược điểm:

1. Ưu điểm:

- Phát triển hệ thống theo hướng nguồn mở (open source) hoàn toàn miễn phí.

- Tích hợp gần như đầy đủ dịch vụ cho việc quản trị hệ thống.

- Hệ thống chạy ổn định, không sinh lỗi và không ăn bộ nhớ.

2. Nhược điểm:

- Chưa hỗ trợ được một Makefile cho toàn bộ hệ thống.

- Giao diện tương tác user chỉ là giao diện dòng lệnh.

III. Hướng phát triển:

- Phát triển cho hệ thống nhỏ gọn hơn nữa để đưa vào đĩa mềm.

- Đang xây dựng hệ thống bằng tay một cách thủ công, có thể phát triển để xây dựng hệ thống một cách tự động (autobuilding) bằng cách dùng một Makefile cho toàn hệ thống.

- Tích hợp thêm giao diện đồ họa vào minimal system để hệ thống thân thiện hơn với người dùng.

TÀI LIỆU THAM KHẢO

[1] How to build a minimal system, ở địa chỉ:

[2] From-PowerUp-To-Bash-Prompt ở địa chỉ:

[3] Gerard Beekmans, Linux From Scratch, 2005, ở địa chỉ:

[4] BLFS Development Team, Beyond Linux From Scratch, 2003, ở địa chỉ:

[5] Nguyễn Phương Lan & Hoàng Đức Hải, Lập trình Linux, 2003.

[6] Gerhard Mourani, Securing and Optimizing Linux_Redhat Edition, 2003

[7] V. Stanfield, R. W. Smith, Linux System Administration, Second Edition, 2003

[8] Don Davies, Embedding Redhat Linux in a DiskOnChip – HOWTO, 2002.

[9] Building Tiny Linux Systems with Busybox, Part2: Building The Kernel ở: http://www.linuxjournal.com/

[10] Tom Fawcett, The Linux Bootdisk HOWTO, 2002, ở địa chỉ:

http://www.linuxlots.com/~fawcett/Bootdisk-HOWTO/index.html

[11] Karim Yaghmour, Building Embedded Linux Systems, 2003 ở:

[12] Trần Thạch Tùng, Bảo mật và Tối ưu trong Red Hat Linux, 2003

PHỤ LỤC

# /etc/rc.d/rc.sysinit - run once at boot time

HOSTNAME=`/bin/hostname`

HOSTTYPE=`uname -m`

unamer=`uname -r`

if [ -f /etc/sysconfig/network ]; then

. /etc/sysconfig/network

fi

if [ -z "$HOSTNAME" -o "$HOSTNAME" = "(none)" ]; then

fi
# Mount /proc and /sys (done here so volume labels can work with fsck)

mount -n -t proc /proc /proc

mount -n -t sysfs /sys /sys >/dev/null 2>&1

. /etc/init.d/functions

if [ "$HOSTTYPE" != "s390" -a "$HOSTTYPE" != "s390x" ]; then

last=0

for i in `LC_ALL=C grep '^[0-9].*respawn:/sbin/getty' /etc/inittab | sed 's/^.* tty\([0-9][0-9]*\).*/\1/g'`; do

last=$i

if [ $last -gt 0 ]; then

> /dev/tty$((last+1))

> /dev/tty$((last+2))

fi

fi
# Set the system clock.

ARC=0

UTC=0

. /etc/sysconfig/clock

# convert old style clock config to new values

if [ "${CLOCKMODE}" = "GMT" ]; then

UTC=true

elif [ "${CLOCKMODE}" = "ARC" ]; then

ARC=true

fi

fi

CLOCKFLAGS="$CLOCKFLAGS --hctosys"

case "$UTC" in

yes|true) CLOCKFLAGS="$CLOCKFLAGS --utc"

CLOCKDEF="$CLOCKDEF (utc)" ;;

no|false) CLOCKFLAGS="$CLOCKFLAGS --localtime"

CLOCKDEF="$CLOCKDEF (localtime)" ;;

esac

yes|true) CLOCKFLAGS="$CLOCKFLAGS --arc"

CLOCKDEF="$CLOCKDEF (arc)" ;;

esac

yes|true) CLOCKFLAGS="$CLOCKFLAGS --srm"

CLOCKDEF="$CLOCKDEF (srm)" ;;

esac

action $"Setting clock $CLOCKDEF: `date`" /bin/true

#update_boot_stage RChostname

action $"Setting hostname ${HOSTNAME}: " hostname ${HOSTNAME}

if [ -f /fsckoptions ]; then

fsckoptions=`cat /fsckoptions`

fi

if [ -f /forcefsck ] || strstr "$cmdline" forcefsck ; then

elif [ -f /.autofsck ]; then

[ -f /etc/sysconfig/autofsck ] && . /etc/sysconfig/autofsck

if [ "$AUTOFSCK_DEF_CHECK" = "yes" ]; then

AUTOFSCK_OPT="$AUTOFSCK_OPT -f"

fi

fsckoptions="$AUTOFSCK_OPT $fsckoptions"

if [ "$BOOTUP" = "color" ]; then

fsckoptions="-C $fsckoptions"

else

fi

if [ -f /etc/sysconfig/readonly-root ]; then

# Call rc.readonly to set up magic stuff needed for readonly root

. /etc/rc.readonly

fi

fi

if [ -z "$fastboot" -a "$READONLY" != "yes" ]; then

echo $STRING

if [ "${RHGB_STARTED}" != "0" -a -w /etc/rhgb/temp/rhgb-console ]; then

fsck -T -A -a $fsckoptions > /etc/rhgb/temp/rhgb-console

else

fsck -T -A -a $fsckoptions

rc=$?

success "$STRING"

echo

elif [ "$rc" -eq "1" ]; then

echo

echo $"Unmounting filesystems"

umount -a

mount -n -o remount,ro /

echo $"Automatic reboot in progress."

reboot -f

fi

# A return of 4 or higher means there were serious problems.

if [ -x /usr/bin/rhgb-client ] && /usr/bin/rhgb-client --ping ; then

chvt 1

fi

failure "$STRING"

echo

echo $"*** Dropping you to a shell; the system will reboot"

echo $"*** when you leave the shell."

str=$"(Repair filesystem)"

PS1="$str \# # "; export PS1

[ "$SELINUX" = "1" ] && disable_selinux

sulogin

echo $"Unmounting file systems"

mount -n -o remount,ro /

echo $"Automatic reboot in progress."

reboot -f

elif [ "$rc" -eq "1" ]; then

_RUN_QUOTACHECK=1

fi

if [ -f /.autofsck -a -x /usr/bin/rhgb-client ] && /usr/bin/rhgb-client --ping ; then

fi

fi

update_boot_stage RCmountfs

state=`LC_ALL=C awk '/ \/ / && ($3 !~ /rootfs/) { print $4 }' /proc/mounts`

[ "$state" != "rw" -a "$READONLY" != "yes" ] && \

mount -n -o remount,rw /
# Clear mtab

(> /etc/mtab) &> /dev/null

rm -f /etc/mtab~ /etc/mtab~~

#mount -f /

mount -f /proc >/dev/null 2>&1

mount -f /sys >/dev/null 2>&1

if [ -f "/var/lib/random-seed" ]; then

cat /var/lib/random-seed > /dev/urandom

else

fi

chmod 600 /var/lib/random-seed

rm -f /fastboot /fsckoptions /forcefsck /.autofsck /halt /poweroff &> /dev/null

_NEED_XFILES=

[ -f /var/run/utmpx -o -f /var/log/wtmpx ] && _NEED_XFILES=1
# Clean up /var. I'd use find, but /usr may not be mounted.

for afile in /var/lock/* /var/run/* ; do

if [ -d "$afile" ]; then

case "$afile" in

*/news|*/mon) ;;

*/sudo) rm -f $afile/*/* ;;

*/vmware) rm -rf $afile/*/* ;;

*/samba) rm -rf $afile/*/* ;;

*/screen) rm -rf $afile/* ;;

*) rm -f $afile/* ;;

esac

else

fi

done

> /var/run/utmp

touch /var/log/wtmp

chgrp utmp /var/run/utmp /var/log/wtmp

chmod 0664 /var/run/utmp /var/log/wtmp

if [ -n "$_NEED_XFILES" ]; then

> /var/run/utmpx

touch /var/log/wtmpx

chgrp utmp /var/run/utmpx /var/log/wtmpx

chmod 0664 /var/run/utmpx /var/log/wtmpx

fi

/sbin/ifconfig lo 127.0.0.1 up

TEXTDOMAIN=initscripts

umask 022

PATH="/sbin:/usr/sbin:/bin:/usr/bin"

export PATH
# Read in our configuration

if [ -z "${BOOTUP:-}" ]; then

if [ -f /etc/sysconfig/init ]; then

. /etc/sysconfig/init

else

# This all seem confusing? Look in /etc/sysconfig/init,

BOOTUP=color

RES_COL=60

MOVE_TO_COL="echo -en \\033[${RES_COL}G"

SETCOLOR_SUCCESS="echo -en \\033[1;32m"

SETCOLOR_FAILURE="echo -en \\033[1;31m"

SETCOLOR_WARNING="echo -en \\033[1;33m"

SETCOLOR_NORMAL="echo -en \\033[0;39m"

LOGLEVEL=1

fi

if [ "$CONSOLETYPE" = "serial" ]; then

MOVE_TO_COL=

SETCOLOR_SUCCESS=

SETCOLOR_FAILURE=

SETCOLOR_WARNING=

SETCOLOR_NORMAL=

fi

fi

if [ "${BOOTUP:-}" != "verbose" ]; then

else

fi
# Check if $pid (could be plural) are running

checkpid() {

local i

[ -d "/proc/$i" ] && return 0

done

return 1

# A function to start a program.

daemon() {

# Test syntax.

local gotbase= force=

local base= user= nice= bg= pid=

nicelevel=0

while [ "$1" != "${1##[-+]}" ]; do

case $1 in

'') echo $"$0: Usage: daemon [+/-nicelevel] {program}"

return 1;;

--check)

gotbase="yes"

shift 2

;;

--check=?*)

gotbase="yes"

shift

;;

--user)

shift 2

--user=?*)

user=${1#--user=}

shift

--force)

shift

[-+][0-9]*)

nice="nice -n $1"

shift

*) echo $"$0: Usage: daemon [+/-nicelevel] {program}"

return 1;;

esac

[ -z "$gotbase" ] && base=${1##*/}

if [ -f /var/run/${base}.pid ]; then

local line p

read line < /var/run/${base}.pid

for p in $line ; do

[ -z "${p//[0-9]/}" -a -d "/proc/$p" ] && pid="$pid $p"

done

fi

[ -n "${pid:-}" -a -z "${force:-}" ] && return

ulimit -S -c ${DAEMON_COREFILE_LIMIT:-0} >/dev/null 2>&1

# if they set NICELEVEL in /etc/sysconfig/foo, honor it

[ -n "$NICELEVEL" ] && nice="nice -n $NICELEVEL"

# Echo daemon

[ "${BOOTUP:-}" = "verbose" -a -z "$LSB" ] && echo -n " $base"

# And start it up.

if [ -z "$user" ]; then

$nice $*

else

fi

[ "$?" -eq 0 ] && success $"$base startup" || failure $"$base startup"

killproc() {

RC=0

# Test syntax.

echo $"Usage: killproc {program} [signal]"

return 1

fi

notset=0

if [ -n "$2" ]; then

killlevel=$2

else

killlevel="-9"

fi

# Save basename.

# Find pid.

pid=

if [ -f /var/run/${base}.pid ]; then

read line < /var/run/${base}.pid

for p in $line ; do

[ -z "${p//[0-9]/}" -a -d "/proc/$p" ] && pid="$pid $p"

done

fi

if [ -z "$pid" ]; then

pidof -o $$ -o $PPID -o %PPID -x $base`

fi

# Kill it.

[ "$BOOTUP" = "verbose" -a -z "$LSB" ] && echo -n "$base "

if [ "$notset" -eq "1" ] ; then

if checkpid $pid 2>&1; then

# TERM first, then KILL if not dead

kill -TERM $pid >/dev/null 2>&1

usleep 100000

if checkpid $pid && sleep 1 &&

checkpid $pid && sleep 3 &&

checkpid $pid ; then

kill -KILL $pid >/dev/null 2>&1

usleep 100000

fi

fi

checkpid $pid

[ "$RC" -eq 0 ] && failure $"$base shutdown" || success $"$base shutdown"

RC=$((! $RC))

# use specified level only

else

if checkpid $pid; then

RC=$?

fi

fi

failure $"$base shutdown"

RC=0

fi

# Remove pid file if any.

rm -f /var/run/$base.pid

fi

return $RC

pidfileofproc() {

local base=${1##*/}

# Test syntax.

if [ "$#" = 0 ] ; then

echo $"Usage: pidfileofproc {program}"

return 1

fi

# First try "/var/run/*.pid" files

local line p pid=

read line < /var/run/$base.pid

for p in $line ; do

[ -z "${p//[0-9]/}" -a -d /proc/$p ] && pid="$pid $p"

done

echo $pid

return 0

fi

fi

pidofproc() {

base=${1##*/}

# Test syntax.

if [ "$#" = 0 ]; then

echo $"Usage: pidofproc {program}"

return 1

fi

# First try "/var/run/*.pid" files

local line p pid=

read line < /var/run/$base.pid

for p in $line ; do

[ -z "${p//[0-9]/}" -a -d /proc/$p ] && pid="$pid $p"

done

echo $pid

return 0

fi

fi

pidof -c -o $$ -o $PPID -o %PPID -x $base

}

status() {

local pid

# Test syntax.

if [ "$#" = 0 ] ; then

echo $"Usage: status {program}"

return 1

# First try "pidof"

pid=`pidof -o $$ -o $PPID -o %PPID -x $1 || \

pidof -o $$ -o $PPID -o %PPID -x ${base}`

if [ -n "$pid" ]; then

echo $"${base} (pid $pid) is running..."

return 0

fi

# Next try "/var/run/*.pid" files

read pid < /var/run/${base}.pid

if [ -n "$pid" ]; then

echo $"${base} dead but pid file exists"

return 1

fi

fi

if [ -f /var/lock/subsys/${base} ]; then

echo $"${base} dead but subsys locked"

return 2

echo $"${base} is stopped"

return 3

}

echo_success() {

echo -n "[ "

[ "$BOOTUP" = "color" ] && $SETCOLOR_SUCCESS

echo -n $"OK"

[ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL

echo -n " ]"

echo -ne "\r"

return 0

echo_failure() {

[ "$BOOTUP" = "color" ] && $MOVE_TO_COL

echo -n "["

[ "$BOOTUP" = "color" ] && $SETCOLOR_FAILURE

echo -n $"FAILED"

[ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL

echo -n "]"

echo -ne "\r"

return 1

echo_passed() {

[ "$BOOTUP" = "color" ] && $MOVE_TO_COL

echo -n "["

[ "$BOOTUP" = "color" ] && $SETCOLOR_WARNING

echo -n $"PASSED"

[ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL

echo -n "]"

echo -ne "\r"

return 1

echo_warning() {

[ "$BOOTUP" = "color" ] && $MOVE_TO_COL

echo -n "["

[ "$BOOTUP" = "color" ] && $SETCOLOR_WARNING

echo -n $"WARNING"

[ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL

echo -n "]"

echo -ne "\r"

return 1

update_boot_stage() {

if [ "$GRAPHICAL" = "yes" -a -x /usr/bin/rhgb-client ]; then

/usr/bin/rhgb-client --update="$1"

fi

return 0

success() {

#if [ -z "${IN_INITLOG:-}" ]; then

# initlog $INITLOG_ARGS -n $0 -s "$1" -e 1

#fi

[ "$BOOTUP" != "verbose" -a -z "$LSB" ] && echo_success

}
# Log that something failed

failure() {

rc=$?

# initlog $INITLOG_ARGS -n $0 -s "$1" -e 2

#fi

[ "$BOOTUP" != "verbose" -a -z "$LSB" ] && echo_failure

[ -w /var/gdm/.gdmfifo ] && echo "BOOTUP_ERRORS" > /var/gdm/.gdmfifo &

return $rc

}
# Log that something passed, but may have had errors. Useful for fsck

passed() {

rc=$?

# initlog $INITLOG_ARGS -n $0 -s "$1" -e 1

#fi

[ "$BOOTUP" != "verbose" -a -z "$LSB" ] && echo_passed

}

# Log a warning

rc=$?

# initlog $INITLOG_ARGS -n $0 -s "$1" -e 1

#fi

[ "$BOOTUP" != "verbose" -a -z "$LSB" ] && echo_warning

}

# Run some action. Log its output.

STRING=$1

echo -n "$STRING "

if [ "${RHGB_STARTED}" != "" -a -w /etc/rhgb/temp/rhgb-console ]; then

echo -n "$STRING " > /etc/rhgb/temp/rhgb-console

fi

shift

rc=$?

if [ "${RHGB_STARTED}" != "" -a -w /etc/rhgb/temp/rhgb-console ]; then

if [ "$rc" = "0" ]; then

echo_success > /etc/rhgb/temp/rhgb-console

else

echo_failure > /etc/rhgb/temp/rhgb-console

fi

echo

return $rc

}

# returns OK if $1 contains $2

[ "${1#*$2*}" = "$1" ] && return 1

return 0

}

# Confirm whether we really want to run this service

[ -x /usr/bin/rhgb-client ] && /usr/bin/rhgb-client --details=yes

while : ; do

echo -n $"Start service $1 (Y)es/(N)o/(C)ontinue? [Y] "

read answer

if strstr $"yY" "$answer" || [ "$answer" = "" ] ; then

return 0

elif strstr $"cC" "$answer" ; then

rm -f /var/run/confirm

[ -x /usr/bin/rhgb-client ] && /usr/bin/rhgb-client --details=no

return 2

elif strstr $"nN" "$answer" ; then

return 1

fi

done

#

# The default compiled in settings are fairly paranoid. This sample file

# Please see vsftpd.conf.5 for all compiled in defaults.

#

# READ THIS: This example file is NOT an exhaustive list of vsftpd options.

# capabilities.

#

# Allow anonymous FTP? (Beware - allowed by default if you comment this out).

#

# Uncomment this to allow local users to log in.

#

# Uncomment this to enable any form of FTP write command.

#

# Default umask for local users is 077. You may wish to change this to 022,

local_umask=022

#

# Uncomment this to allow the anonymous FTP user to upload files. This only

# obviously need to create a directory writable by the FTP user.

#anon_upload_enable=YES

#

# Uncomment this if you want the anonymous FTP user to be able to create

#anon_mkdir_write_enable=YES

#

# Activate directory messages - messages given to remote users when they

dirmessage_enable=YES

#

# Activate logging of uploads/downloads.

#

# Make sure PORT transfer connections originate from port 20 (ftp-data).

#

# If you want, you can arrange for uploaded anonymous files to be owned by

# recommended!

#chown_uploads=YES

#chown_username=whoever

#

# You may override where the log file goes if you like. The default is shown

#xferlog_file=/var/log/vsftpd.log

#

# If you want, you can have your log file in standard ftpd xferlog format

#

# You may change the default value for timing out an idle session.

#

# You may change the default value for timing out a data connection.

#

# It is recommended that you define on your system a unique user which the

#nopriv_user=ftpsecure

#

# Enable this and the server will recognise asynchronous ABOR requests. Not

# however, may confuse older FTP clients.

#async_abor_enable=YES

#

# By default the server will pretend to allow ASCII mode but in fact ignore

# mangling on files when in ASCII mode.

# Beware that on some FTP servers, ASCII support allows a denial of service

# attack (DoS) via the command "SIZE /big/file" in ASCII mode. vsftpd

# predicted this attack and has always been safe, reporting the size of the

# raw file.

# ASCII mangling is a horrible feature of the protocol.

#ascii_upload_enable=YES

#ascii_download_enable=YES

#

# You may fully customise the login banner string:

#

# You may specify a file of disallowed anonymous e-mail addresses. Apparently

#deny_email_enable=YES

# (default follows)

#banned_email_file=/etc/vsftpd.banned_emails

#

# You may specify an explicit list of local users to chroot() to their home

# users to NOT chroot().

#chroot_list_enable=YES

# (default follows)

#chroot_list_file=/etc/vsftpd.chroot_list

#

# You may activate the "-R" option to the builtin ls. This is disabled by

# sites. However, some broken FTP clients such as "ncftp" and "mirror" assume

# the presence of the "-R" option, so there is a strong case for enabling it.

#ls_recurse_enable=YES

listen=YES
4. /etc/init.d/named

#!/bin/sh

#

# named This shell script takes care of starting and stopping

#

# chkconfig: - 55 45

# that is used to resolve host names to IP addresses.

# probe: true
# Source function library.

. /etc/rc.d/init.d/functions

. /etc/sysconfig/network

[ ${NETWORKING} = "no" ] && exit 0

case "$1" in

start)

# Start daemons.

daemon named

RETVAL=$?

[ $RETVAL -eq 0 ] && touch /var/lock/subsys/named

echo

;;

stop)

echo -n "Shutting down named: "

killproc named

RETVAL=$?

[ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/named

echo

status)

exit $?

restart)

$0 start

reload)

exit $?

probe)

# to offer to restart every time

/usr/sbin/rndc reload >/dev/null 2>&1 || echo start

exit 0

*)

echo "Usage: named {start|stop|status|restart}"

esac
exit $RETVAL

[global]

netbios name = MinSystem

server string = Samba Server

security = user

encrypt passwords = true

smb passwd file = /etc/samba/smbpasswd

hosts allow = 192.168.1. 192.168.2. 127.

; load printers = yes

; printcap name = /etc/printcap

; printcap name = lpstat

; printing = cups

; guest account = pcguest

log file = /var/log/samba/log.%m

max log size = 50

; password server =

; realm = MY_REALM

; include = /usr/local/samba/lib/smb.conf.%m

socket options = TCP_NODELAY

; interfaces = 192.168.12.2/24 192.168.13.2/24

local master = yes

os level = 65

preferred master = yes

; domain logons = yes

; logon script = %m.bat

# run a specific logon batch file per username

; logon script = %U.bat

# Where to store roving profiles (only for Win95 and WinNT)

# %L substitutes for this servers netbios name, %U is username

# You must uncomment the [Profiles] share below

; logon path = \\%L\Profiles\%U

# Windows Internet Name Serving Support Section:

# WINS Support - Tells the NMBD component of Samba to enable it's WINS Server

; wins support = yes
# WINS Server - Tells the NMBD components of Samba to be a WINS Client

# Note: Samba can be either a WINS Server, or a WINS Client, but NOT both

; wins server = w.x.y.z

# WINS Proxy - Tells Samba to answer name resolution queries on

# behalf of a non WINS capable client, for this to work there must be

# at least one WINS Server on the network. The default is NO.

; wins proxy = yes

# DNS Proxy - tells Samba whether or not to try to resolve NetBIOS names

# via DNS nslookups. The default is NO.

dns proxy = no

name resolve order = lmhosts host bcash

# These scripts are used on a domain controller or stand-alone

# machine to add or delete corresponding unix accounts

; add user script = /usr/sbin/useradd %u

; add group script = /usr/sbin/groupadd %g

; add machine script = /usr/sbin/adduser -n -g machines -c Machine -d /dev/null -s /bin/false %u

; delete user script = /usr/sbin/userdel %u

; delete user from group script = /usr/sbin/deluser %u %g

; delete group script = /usr/sbin/groupdel %g

#============================ Share Definitions ==============================

[homes]

comment = Home Directories

writable = yes

# Un-comment the following and create the netlogon directory for Domain Logons

; [netlogon]

; comment = Network Logon Service

; path = /usr/local/samba/lib/netlogon

; guest ok = yes

; writable = no

; share modes = no

;[Profiles]

; path = /usr/local/samba/profiles

; browseable = no

; guest ok = yes

# NOTE: If you have a BSD-style print system there is no need to

# specifically define each individual printer

[printers]

comment = All Printers

path = /usr/spool/samba

browseable = no

# Set public = yes to allow user 'guest account' to print

; guest ok = no

writable = no

printable = yes

# This one is useful for people to share files

[tmp]

comment = Temporary file space

read only = no

writable = yes

public = yes

id:3:initdefault:

# System initialization.

si::sysinit:/etc/rc.d/rc.sysinit

l0:0:wait:/etc/rc.d/rc 0

l1:1:wait:/etc/rc.d/rc 1

l3:3:wait:/etc/rc.d/rc 3

l6:6:wait:/etc/rc.d/rc 6

ca::ctrlaltdel:/sbin/shutdown -t3 -r now

# of power left. Schedule a shutdown for 2 minutes from now.

# This does, of course, assume you have powerd installed and your

# UPS connected and working correctly.

pf::powerfail:/sbin/shutdown -f -h +2 "Power Failure; System Shutting Down"
# If power was restored before the shutdown kicked in, cancel it.

pr:12345:powerokwait:/sbin/shutdown -c "Power Restored; Shutdown Cancelled"

1:2345:respawn:/sbin/getty 9600 tty1

2:2345:respawn:/sbin/getty 9600 tty2

3:2345:respawn:/sbin/getty 9600 tty3

#

/dev/hda11 / ext2 defaults 1 1

proc /proc proc defaults 0 0

sys /sys sysfs defaults 0 0