linux根文件系统树制作

旧城等待， 2022-08-09 11:55 224阅读 0赞

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系统环境：Centos 6.5

板子芯片：s3c2440

内核版本：linux 3.0

编译器：arm-linux-gcc 4.5.4

作者：Lu Zengmeng <1540999272@qq.com>

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1、创建根文件目录树

\[monster@localhost ~\]$ mkdir rootfs

\[monster@localhost ~\]$ cd rootfs/ 
\[monster@localhost rootfs\]$ mkdir -p \{apps,bin,data,dev,info,proc,root,sbin,sys,tmp,var,etc/\{,init.d,dropbear\},mnt/\{,usb,sdc,nfs,dev\},usr/\{,bin,sbin,lib,sharre\},lib/\{,modules/\{,3.0.0\}\}\} 
\[monster@localhost rootfs\]$ tree -L 3 
. 
├── apps 
├── bin 
├── data 
├── dev 
├── etc 
│   ├── dropbear 
│   └── init.d 
├── info 
├── lib 
│   └── modules 
│       └── 3.0.0 
├── mnt 
│   ├── dev 
│   ├── nfs 
│   ├── sdc 
│   └── usb 
├── proc 
├── root 
├── sbin 
├── sys 
├── tmp 
├── usr 
│   ├── bin 
│   ├── lib 
│   ├── sbin 
│   └── sharre 
└── var 
 
27 directories, 0 files 
\[monster@localhost rootfs\]$  
时静态创建这两个设备文件，否则在系统启动时将提示 
Waring：unable to open an initial console: 
\[monster@localhost rootfs\]$ sudo mknod -m666 dev/null c 1 3 
\[monster@localhost rootfs\]$ sudo mknod -m666 dev/console c 5 1 
\[monster@localhost rootfs\]$ sudo mknod -m666 dev/ttyS0 c 4 64 
\[monster@localhost rootfs\]$ sudo mknod -m666 dev/ttySAC0 c 4 64 
\[monster@localhost rootfs\]$ sudo mknod dev/mtdblock0 b 31 0 
\[monster@localhost rootfs\]$ sudo mknod dev/mtdblock1 b 31 1 
\[monster@localhost rootfs\]$ sudo mknod dev/mtdblock2 b 31 2 
\[monster@localhost rootfs\]$ sudo mknod dev/mtdblock3 b 31 3 
\[monster@localhost rootfs\]$ sudo mknod dev/mtdblock4 b 31 4 
\[monster@localhost rootfs\]$ sudo mknod dev/mtdblock5 b 31 5  
\[monster@localhost rootfs\]$ sudo mknod dev/mtdblock6 b 31 6  
\[monster@localhost rootfs\]$ sudo mknod dev/mtdblock7 b 31 7   
\[monster@localhost rootfs\]$ sudo mknod dev/mtdblock8 b 31 8  
\[monster@localhost rootfs\]$ ll dev/ 
总用量 0 
crw-rw-rw- 1 root root  5,  1 10月 22 00:39 console 
brw-r--r-- 1 root root 31,  0 10月 22 00:39 mtdblock0 
brw-r--r-- 1 root root 31,  1 10月 22 00:39 mtdblock1 
brw-r--r-- 1 root root 31,  2 10月 22 00:39 mtdblock2 
brw-r--r-- 1 root root 31,  3 10月 22 00:39 mtdblock3 
brw-r--r-- 1 root root 31,  4 10月 22 00:40 mtdblock4 
brw-r--r-- 1 root root 31,  5 10月 22 00:40 mtdblock5 
brw-r--r-- 1 root root 31,  6 10月 22 00:40 mtdblock6 
brw-r--r-- 1 root root 31,  7 10月 22 00:40 mtdblock7 
brw-r--r-- 1 root root 31,  8 10月 22 00:40 mtdblock8 
crw-rw-rw- 1 root root  1,  3 10月 22 00:38 null 
crw-rw-rw- 1 root root  4, 64 10月 22 00:39 ttyS0 
crw-rw-rw- 1 root root  4, 64 10月 22 00:39 ttySAC0 
\[monster@localhost rootfs\]$ ln -s /tmp var/log 
\[monster@localhost rootfs\]$ ln -s /tmp var/run 
\[monster@localhost rootfs\]$ ln -s /tmp var/tmp 
\[monster@localhost rootfs\]$ ls -l var/ 
总用量 0 
lrwxrwxrwx 1 monster monster 4 10月 22 00:42 lock -> /tmp 
lrwxrwxrwx 1 monster monster 4 10月 22 00:47 log -> /tmp 
lrwxrwxrwx 1 monster monster 4 10月 22 00:47 run -> /tmp 
lrwxrwxrwx 1 monster monster 4 10月 22 00:47 tmp -> /tmp 
\[monster@localhost rootfs\]$ cp -af /opt/buildroot-2012.08/arm920t/usr/arm-unknown-linux-uclibcgnueabi/lib/\*so\* lib/ 
\[monster@localhost etc\]$ ls 
dropbear  init.d 
\[monster@localhost etc\]$ vim inittab 
\# /etc/inittab 
\# 
\# Copyright (C) 2011 fulinux <fulinux@gmail.com> 
\# 
\# Note: BusyBox init doesn't support runlevels. The runlevels field is 
\# completely ignored by BusyBox init. If you want runlevels, use sysvinit. 
\# 
\# Format for each entry: <id>:<runlevels>:<action>:<process> 
\# 
\# id == tty to run on, or empty for /dev/console. 
\# If specified, then /dev/$id device must exist 
\# runlevels == ignored, busybox doesn't support it 
\# action == one of sysinit, respawn, askfirst, wait, and once 
\# process == program to run 
\# Startup the system 
\# mount all the file systems specified in /etc/fstab 
::sysinit:/bin/mount -a 
\#Use mdev as hotplug to auto mount USB storage or SD card 
::sysinit:/bin/echo /sbin/mdev > /proc/sys/kernel/hotplug 
\#Use mdev to auto generate the device node in /dev path 
::sysinit:/sbin/mdev -s 
\#make shm, pts support 
::sysinit:/bin/mkdir -p /dev/pts 
::sysinit:/bin/mkdir -p /dev/shm 
::sysinit:/bin/mount -t devpts devpts /dev/pts 
\#Mount our apps/info partition 
null::wait:/bin/mount -o sync,noatime,ro -t jffs2 /dev/mtdblock6 /apps 
null::wait:/bin/mount -o sync,noatime,ro -t jffs2 /dev/mtdblock7 /info 
\#Set hostname 
null::sysinit:/bin/hostname -F /etc/hostname 
\#Enable console logon 
null::respawn:/sbin/getty -L ttyS0 115200 vt100 
\# now run any rc scripts 
null::wait:/etc/init.d/rcS 
\# system daemon 
null::respawn:/sbin/syslogd -n 
null::respawn:/sbin/klogd -n 
\# Stuff to do before rebooting 
null::shutdown:/bin/umount /apps 
null::shutdown:/bin/umount /info 
null::shutdown:/bin/killall klogd 
null::shutdown:/bin/killall syslogd 
null::shutdown:/bin/umount -a -r 
\#null::shutdown:/sbin/swapoff -a 
创建/etc/init.d/rcS 脚本 
\[monster@localhost etc\]$ vim init.d/rcS 
\#!/bin/sh 
\# Copyright (C) 2011 fulinux <fulinux@gmail.com> 
\# Start all init scripts in /etc/init.d 
\# executing them in numerical order. 
\# 
for i in /etc/init.d/S??\* ; do 
$i 
done 
配置网卡启动脚本

2、dev目录下创建设备节点

因为内核挂载完文件系统后，init 进程需要用到/dev/console 和/dev/null 这两个设备文件来调用 mdev 构建 dev，所以必须在制作文件系统

3、var目录下创建符号链接

\[monster@localhost rootfs\]$ ln -s /tmp var/lock

5、拷贝交叉编译器中的动态库到相应的目录下

\[monster@localhost rootfs\]$ cp -af /opt/buildroot-2012.08/arm920t/usr/arm-unknown-linux-uclibcgnueabi/sysroot/lib/\*so\* lib/

6、etc/目录下创建一些文件

创建inittab文件

\[monster@localhost rootfs\]$ cd etc/

\[monster@localhost etc\]$ vim init.d/S01\_network

#!/bin/sh
 ifconfig eth0 192.168.1.111 netmask 255.255.255.0 up

创建支持/apps/etc 目录下的启动脚本  
\[monster@localhost etc\]$ vim init.d/S99\_rcsApp

#!/bin/sh
 # Copyright (C) 2011 fulinux <fulinux@gmail.com>
 # 
 # Start all init scripts in /apps/etc/init.d
 # executing them in numerical order.
 #
 if (test -d /apps/etc/init.d)
 then
 for i in /apps/etc/init.d/S??* ; do
 $i
 done
 fi

修改 init.d 目录下的文件权限  
\[monster@localhost etc\]$ chmod 777 init.d/\*  
\[monster@localhost etc\]$ ll init.d/  
总用量 12  
\-rwxrwxrwx 1 monster monster 179 10月 22 01:11 rcS  
\-rwxrwxrwx 1 monster monster  63 10月 22 01:14 S01\_network  
\-rwxrwxrwx 1 monster monster 236 10月 22 01:16 S99\_rcsApp

创建 fstab 文件

\[monster@localhost etc\]$ vim fstab

# /etc/fstab: static file system information.
 # Copyright (C) 2011 fulinux <fulinux@gmail.com>
 #
 #<File system> <mount pt> <type> <options> <dump> <pass>
 #devpts /dev/pts devpts defaults 0 0
 #/dev/root / ext2 rw,noauto 0 1
 proc /proc proc defaults 0 0
 tmpfs /tmp tmpfs defaults 0 0
 tmpfs /dev tmpfs defaults 0 0
 sysfs /sys sysfs defaults 0 0

创建 hostname,hosts,TZ 文件 
\[monster@localhost etc\]$ echo "root" > hostname 
\[monster@localhost etc\]$ echo "127.0.0.1 localhost" >> hosts 
\[monster@localhost etc\]$ echo "127.0.0.1 localhost" >> hostsecho "MST7MDT" >> TZ^C 
\[monster@localhost etc\]$ echo "MST7MDT" >> TZ 
\[monster@localhost etc\]$ echo "Copyright (C) 2015 luzengmeng<luzengmeng@gmail.com>" >> issue

创建profile文件

\[monster@localhost etc\]$ vim profile

# /etc/profile: system-wide .profile file for the Bourne shells.
 export PATH=\
 /bin:\
 /sbin:\
 /usr/bin:\
 /usr/sbin:\
 /usr/local/bin:\
 /apps/bin:\
 /apps/tools:\
 /apps/tslib/bin\
 # If running interactively, then:
 if [ "$PS1" ]; then
 if [ "$BASH" ]; then
 export PS1="[\u@\h \W]\\$ "
 alias ll='/bin/ls --color=tty -laFh'
 alias ls='/bin/ls --color=tty -F'
 export
 LS_COLORS='no=00:fi=00:di=01;34:ln=01;36:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:ex=01;
 32:*.tar=01;31:*.tgz=01;31:*.arj=01;31:*.taz=01;31:*.lzh=01;31:*.zip=01;31:*.z=01;31:*.Z=01;31:*.gz=01;31:*.bz2=01;31:*.de
 b=0
 1;31:*.rpm=01;31:*.jar=01;31:*.jpg=01;35:*.jpeg=01;35:*.png=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;
 35
 :*.tga=01;35:*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.mpg=01;35:*.mpeg=01;35:*.avi=01;35:*.fli=01;35:*.gl=01;35:
 *.d
 l=01;35:*.xcf=01;35:*.xwd=01;35:';
 else
 if [ "`id -u`" -eq 0 ]; then
 export PS1='>: '
 else
 export PS1='>: '
 fi
 fi
 # System Setting
 set -o vi
 alias ll='ls -l'
 export USER=`id -un`
 export LOGNAME=$USER
 export HOSTNAME=`/bin/hostname`
 export HISTSIZE=1000
 export HISTFILESIZE=1000
 export PAGER='/bin/more '
 export EDITOR='/bin/vi'
 export INPUTRC=/etc/inputrc
 export DMALLOC_OPTIONS=debug=0x34f47d83,inter=100,log=logfile
 export VAR1=
 export VAR2=
 export VAR3=
 export VAR4=
 export VAR5=
 export LD_LIBRARY_PATH=/lib:/usr/lib/
 # QT Extendded 4.4.3 Setting
 export QTDIR=/apps/qt-extended-4.4.3
 export QWS_MOUSE_PROTO='TSLIB:/dev/event0'
 export QWS_DISPLAY='LinuxFB:/dev/fb0'
 export QWS_DISPLAY='LinuxFB:mmWidth240:mmHeight320:0'
 export QWS_SIZE='240x320'
 export QT_PLUGIN_PATH=$QTDIR/plugins/
 export QT_QWS_FONTDIR=$QTDIR/lib/fonts
 export PATH=$QTDIR/bin:$PATH
 export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$QTDIR/lib
 # Touch Scree tslib Setting
 export TSLIB_ROOT=/apps/tslib
 export TSLIB_CONFFILE=$TSLIB_ROOT/etc/ts.conf
 export TSLIB_CALIBFILE=$TSLIB_ROOT/etc/pointercal
 export TSLIB_TSDEVICE=/dev/event0
 export TSLIB_CONSOLEDEVICE=none
 export TSLIB_FBDEVICE=/dev/fb0
 fi;

创建指定一些协议所使用的端口号文件 protocols  
\[monster@localhost etc\]$ vim protocols

# /etc/protocols:
 # $Id: protocols,v 1.1.1.1 2001/09/12 19:03:24 andersee Exp $
 # 
 # Internet (IP) protocols
 # from: @(#)protocols 5.1 (Berkeley) 4/17/89
 # Updated for NetBSD based on RFC 1340, Assigned Numbers (July 1992).
 ip 0 IP # internet protocol, pseudo protocol number
 icmp 1 ICMP # internet control message protocol
 igmp 2 IGMP # Internet Group Management
 ggp 3 GGP # gateway-gateway protocol
 ipencap 4 IP-ENCAP # IP encapsulated in IP (officially ``IP'')
 st 5 ST # ST datagram mode
 tcp 6 TCP # transmission control protocol
 egp 8 EGP # exterior gateway protocol
 pup 12 PUP # PARC universal packet protocol
 udp 17 UDP # user datagram protocol
 hmp 20 HMP # host monitoring protocol
 xns-idp 22 XNS-IDP # Xerox NS IDP
 rdp 27 RDP # "reliable datagram" protocol
 iso-tp4 29 ISO-TP4 # ISO Transport Protocol class 4
 xtp 36 XTP # Xpress Tranfer Protocol
 ddp 37 DDP # Datagram Delivery Protocol
 idpr-cmtp 39 IDPR-CMTP # IDPR Control Message Transport
 rspf 73 RSPF #Radio Shortest Path First.
 vmtp 81 VMTP # Versatile Message Transport
 ospf 89 OSPFIGP # Open Shortest Path First IGP
 ipip 94 IPIP # Yet Another IP encapsulation
 encap 98 ENCAP # Yet Another IP encapsulation

创建**mdev.conf**文件

mdev 会在/etc 目录下找 mdev 的配置文件: mdev.conf. 如果该文件不存在，那么在执行 mdev –s 这个命令时，  
会提示找不到 mdev.conf， 这时我们可以建一个空的 mdev.conf 文件解决这个问题。 下面创建使用 mdev 自动挂载 u 盘和 SD 卡的配置/etc/mdev.conf

\[monster@localhost etc\]$ vim mdev.conf

sd[a-z][0-9] 0:0 0777 @(mount /dev/$MDEV /mnt/usb)
 sd[a-z] 0:0 0777 $(umount /mnt/usb)
 ub[a-z][0-9] 0:0 0777 @(mount /dev/$MDEV /mnt/usb)
 ub[a-z] 0:0 0777 $(umount /mnt/usb)
 mmcblk[0-9]p[0-9] 0:0 0777 @(mount /dev/$MDEV /mnt/sdc)
 mmcblk[0-9] 0:0 0777 $(umount /mnt/sdc)

创建用户组**group**文件  
\[monster@localhost etc\]$ vim group  
root:x:0:root  
它的格式如下：  
groupname:password:gid:members  
第一个字段为用户组名称  
第二个字段为用户组密码，当为 x 时密码是映射到/etc/gshadow 中的，是非逆的  
第三个字段为 GID，及组号，为正整数或 0，0 被付于了 root 用户组；系统通常会预留一些较靠前的 GID 给系统虚拟用户之用，每个系统预留的  
GID 都不同，Fedora 预留了 500 个，所以我们添加新用户组时是从 500 开始的。GID 的范围由/etc/login.defs 中的 GID\_MIN 和 GID\_MAX 决定  
第四个字段为用户列表，每个用户间用逗号分隔  
这里的 password 代表组口令，很少用到。它可使原先不在这个群组中的用户可以通过 newgrp 命令暂时继承该组的权限，使用 newgrp 命令时会新开一个 shell。口令的加密方式和 passwd 文件中的口令一样，所以如果需设置组口令，要用 passwd 程序虚设一个用户，再把该用户password节中的加密口令拷贝到/etc/group 文件中。members 列代表组成员，我们可把需加入该组的用户以逗号分隔添加到这里即可。同一组的成员可继承该组所拥有的权限。

创建用户**passwd**文件

\[monster@localhost etc\]$ vim psswd

root:x:0:0:root:/:/bin/sh

它的格式如下：  
username:password:uid:gid:gecos:homedir:shell  
第一个字段为登录名  
第二个字段为口令，一般被映射到 shadow 文件中  
第三个字段为 UID  
第四个字段为 GID  
第五个字段为用户名全称，gecos 是通用电子计算机操作系统的缩写，是 Bell 实验室中的一台大型主机。  
第六个字段为用户根目录  
第七个字段为用户所用 SHELL 的类型  
Unix 系统最初是用明文保存密码的，后来由于安全的考虑，采用 crypt()算法加密密码并存放在/etc/passwd 文件。现在，由于计算机处理能力的提高，使密码破解变得越来越容易。/etc/passwd 文件是所有合法用户都可访问的，大家都可互相看到密码的加密字符串，这给系统带来很大的安全威胁。现代的 Unix 系统使用影子密码系统，它把密码从/etc/pa sswd 文件中分离出来，真正的密码保存在/etc/shadow 文件中，shadow文件只能由超级用户访问。这样入侵者就不能获得加密密码串，用于破解。使用 shadow 密码文件后，/etc/passwd 文件中所有帐户的 password域的内容为"x"，如果 password 域的内容为"\*"，则该帐号被停用。使用 passwd 这个程序可修改用户的密。  
创建密码映射 **shadow** 文件  
\[monster@localhost etc\]$ vim shadow  
root::0:0:99999:7:::

7、在文件系统中安装busybox

\[monster@localhost ~\]cd

\[monster@localhost ~\]$ tar -xjf busybox-1.20.2.tar.bz2   
\[monster@localhost ~\]$ cd busybox-1.20.2  
\[monster@localhost busybox-1.20.2\]$ vim Makefile

\#修改 CROSS\_COMPILER 为：  
CROSS\_COMPILE ?= /opt/buildroot-2012.08/arm920t/usr/bin/arm-linux-

\[monster@localhost busybox-1.20.2\]$ sudo make menuconfig

\#选择：  
Busybox Settings --->  
General Configuration --->  
\[\*\] Don't use /usr  
Installation Options ("make install" behavior) --->  
What kind of applet links to install (as soft-links) --->

(~/rootfs) BusyBox installation prefix

\[monster@localhost busybox-1.20.2\]$ sudo make

编译过程略

\[monster@localhost busybox-1.20.2\]$ file busybox  
busybox: ELF 32-bit LSB executable, ARM, version 1 (SYSV), dynamically linked (uses shared libs), stripped  
\[monster@localhost busybox-1.20.2\]$ sudo make install  
  ~/rootfs//bin/\[ -> busybox  
  ~/rootfs//bin/\[\[ -> busybox  
  ~/rootfs//bin/add-shell -> busybox  
  ~/rootfs//bin/addgroup -> busybox  
  ~/rootfs//bin/adduser -> busybox  
  ~/rootfs//bin/arping -> busybox  
  ~/rootfs//bin/ash -> busybox

。。。。。。。。

\--------------------------------------------------  
You will probably need to make your busybox binary  
setuid root to ensure all configured applets will  
work properly.  
\--------------------------------------------------

\[monster@localhost busybox-1.20.2\]$ ls ../rootfs/  
apps  bin  data  dev  etc  info  lib  mnt  proc  root  sbin  sys  tmp  usr  var

8、移植dropbear

首先编译生成 **PC** 版的，在制作密钥时用到  
\[monster@localhost dropbear-0.53.1\]$ tar -xjf dropbear-0.53.1.tar.bz2

\[monster@localhost dropbear-0.53.1\]$ cd dropbear-0.53.1

\[monster@localhost dropbear-0.53.1\]$ ./configure && make

生成的文件：  
dropbear： ssh2 server  
dropbearkey: 密钥生成器  
dropbearconvert: 可以转换 openssh 的密钥  
dbclient: ssh2 client  
\[monster@localhost dropbear-0.53.1\]$ ./dropbearkey -t rsa -f ~/rootfs/etc/dropbear/dropbear\_rsa\_host\_key  
Will output 1024 bit rsa secret key to '/home/monster/rootfs/etc/dropbear/dropbear\_rsa\_host\_key'  
Generating key, this may take a while...  
Public key portion is:  
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAAAgmb5EKxtGdLQ2JuOPljKxFFmzdMj30lvR6EPWzCE2sQ/UV3mSOGvRq27Jo0ANmq+PDu2eLN+EYkwZDdq4svQK8+wH9KWuAnUDZHGB83tE/RwiI2PI1Xpp0/D3/RuoUs9LS8qs2LeLCUEbZlPidTliOUtN4IGqdgxarSkt/hfixHVgI8= monster@localhost.localdomain  
Fingerprint: md5 f0:e3:2c:54:bb:d3:64:0b:e5:ab:a3:11:67:a7:84:4d  
\[monster@localhost dropbear-0.53.1\]$ ./dropbearkey -t dss -f ~/rootfs/etc/dropbear/dropbear\_dss\_host\_key  
Will output 1024 bit dss secret key to '/home/monster/rootfs/etc/dropbear/dropbear\_dss\_host\_key'  
Generating key, this may take a while...  
Public key portion is:  
ssh-dss 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 monster@localhost.localdomain  
Fingerprint: md5 e2:ec:7a:7d:9e:97:e1:ba:22:ac:08:82:cb:1f:a8:fc

\[monster@localhost ~\]$ chmod 666 rootfs/etc/dropbear/dropbear\_\*

编译arm版

\[monster@localhost dropbear-0.53.1\]$ make distclean

\[monster@localhost dropbear-0.53.1\]$ ./configure CC=/opt/buildroot-2012.08/arm920t/usr/bin/arm-linux-gcc --build=i686 --host=arm-linux --disable-zlib  
\[monster@localhost dropbear-0.53.1\]$ make

\[monster@localhost dropbear-0.53.1\]$ file dropbear dbclient  
dropbear: ELF 32-bit LSB executable, ARM, version 1 (SYSV), dynamically linked (uses shared libs), not stripped  
dbclient: ELF 32-bit LSB executable, ARM, version 1 (SYSV), dynamically linked (uses shared libs), not stripped

\[monster@localhost dropbear-0.53.1\]$ mv dbclient ssh

\[monster@localhost dropbear-0.53.1\]$ /opt/buildroot-2012.08/arm920t/usr/bin/arm-linux-strip dropbear  
\[monster@localhost dropbear-0.53.1\]$ /opt/buildroot-2012.08/arm920t/usr/bin/arm-linux-strip ssh

\[monster@localhost dropbear-0.53.1\]$ cp dropbear ssh ../rootfs/usr/sbin/

9、在文件系统中创建启动脚本

\[monster@localhost rootfs\]$ vim etc/init.d/S04\_dropbear

\#!/bin/sh  
 /usr/sbin/dropbear

\[monster@localhost rootfs\]$ chmod 777 etc/init.d/S04\_dropbear   
\[monster@localhost rootfs\]$ ls  
apps  bin  data  dev  etc  info  lib  mnt  proc  root  sbin  sys  tmp  usr  var  
\[monster@localhost rootfs\]$ OK