1.解压软件包
tar jxvf busybox-1.15.2.tar.tar
2.修改Makefile
CROSS_COMPILE ?= arm_920t_le-
ARCH = arm
##ARCH ?= $(SUBARCH)
3.make menuconfig
Busybox Settings --->
General Configuration --->
去掉[ ] Use the devpts filesystem for Unix98 PTYs //为了使telnetd服务更方便使用,将这个选项去掉
Busybox Settings --->
Build Options --->
选择 [*] Build shared libbusybox
去掉[ ]Produce a binary for each applet, linked against libbusybox
去掉[ ]Produce additional busybox binary linked against libbusybox
(/usr/local/920t_le/bin/arm_920t_le-) Cross Compiler prefix //设置交叉编译工具
Busybox Settings --->
Installation Options --->
去掉 [ ] Don't use /usr // make install时,生成/usr 目录
(../../Rootfs/rootfs_rita/) BusyBox installation prefix //设置busybox的安装路径
Busybox Settings --->
Busybox Library Tuning --->
选择[*] vi-style line editing commands
选择[*] Fancy shell prompts //为了设置PS1, 是/u,/h,/w等特殊字符生效,必须选上
Coreutils --->
去掉[ ] fsync
Miscellaneous Utilities --->
去掉[ ] ionice
去掉[ ] watchdog
Networking Utilities --->
去掉[ ] ifenslave
Networking Utilities --->
去掉[ ] Support standalone telnetd (not inetd only)
如果直接启动telnetd服务,则
Networking Utilities --->
选择[*] Support standalone telnetd (not inetd only)
Login/Password Management Utilities
去掉[ ] Support for /etc/nologin
去掉[ ] Support for /etc/securetty //使root用户能登录到板子上
配置/etc/inittab ,内容如下:
console::sysinit:-/etc/rc
ttySL0::respawn:/sbin/getty -L ttySL0 115200 vt100
::restart:/sbin/init
::ctrlaltdel:/sbin/reboot
::shutdown:/bin/umount -a -r
::shutdown:/sbin/swapoff -a
板子启动时,出现如下出错信息:
*** 问题 1 ***
Warning: unable to open an initial console.
解决方法:
在/dev/目录下,增加两个设备:
/dev/ttySL0
/dev/console
*** 问题 2 ***
Kernel panic - not syncing: No init found. Try passing init= option to kernel.
解决方法:
因为这里使用的init程序是busybox中的命令,所以先用ldd命令查看busybox的相关库:
bash-2.05b# arm_920t_le-ldd busybox
libcrypt.so.1 => /usr/local/920t_le/target/lib/libcrypt.so.1 (0xdead1000)
libc.so.6 => /usr/local/920t_le/target/lib/libc.so.6 (0xdead2000)
/lib/ld-linux.so.2 => /usr/local/920t_le/target/lib/ld-linux.so.2 (0xdead3000)
很明显可以看出:
busybox所需要的库为: libcrypt.so.1,libc.so.6,/lib/ld-linux.so.2
去/usr/local/920t_le/target/lib目录下拷贝这三个库文件到ramdisk的/lib目录下;
如果,不知道/dev下下有哪些设备节点,可以使用如下命令,自动生成/dev目录下的设备节点
touch /etc/mdev.conf
/sbin/mdev -s
*** 问题 3 ***
/usr/sbin/thttpd: unknown user - 'root'
proftd 开启ftp服务出错:
解决方法:
需要库文件:
libnss_dns.so.2
libnss_files.so.2
去/usr/local/920t_le/target/lib目录下拷贝这两个库文件到ramdisk的/lib目录下
*** 问题 4 ***
root用户不能登录
解决方法有两种
解决方法一:
在/etc/securetty中增加一行:
ttySL0
解决方法二:
修改busybox配置:
Login/Password Management Utilities
去掉[ ] Support for /etc/nologin
去掉[ ] Support for /etc/securetty
*** 问题 5 ***
PS1变量设置的特殊字符不生效,如:
在/root/.profile中,这样设置PS1:
PS1="[\u@\h \w]# "
其中,\u \h \w 等特殊字符分别表示的是当前用户、主机名和当前目录,
但是发现在板子上并没有生效,而是原样显示上述字符:
[\u@\h \w]\$
解决方法:
修改busybox的配置
Busybox Settings --->
Busybox Library Tuning --->
选择[*] vi-style line editing commands
选择[*] Fancy shell prompts //为了设置PS1, 是/u,/h,/w等特殊字符生效,必须选上
*** 问题 6 ***
ftp无法登录
C:\Documents and Settings\Administrator>ftp 192.168.5.231
Connected to 192.168.5.231.
220 ProFTPD 1.3.0 Server (TinaGarden FTPD) [192.168.5.231]
User (192.168.5.231:(none)): admin
331 Password required for admin.
Password:
530 Login incorrect.
Login failed.
ftp>
ftp>
ftp>
ftp> by
421 No Transfer Timeout (300 seconds): closing control connection.
C:\Documents and Settings\Administrator>ftp 192.168.5.231
Connected to 192.168.5.231.
220 ProFTPD 1.3.0 Server (TinaGarden FTPD) [192.168.5.231]
User (192.168.5.231:(none)): root
331 Password required for root.
Password:
530 Login incorrect.
Login failed.
ftp> user admin
331 Password required for admin.
Password:
530 Login incorrect.
Login failed.
ftp>
ftp>
ftp>
ftp>
原因:
/etc/ftpusers 限定了root用户不能登录ftp,
admin用户就可以登录ftp,用户:admin,密码:admin
C:\Documents and Settings\Administrator>ftp 192.168.5.231
Connected to 192.168.5.231.
220 ProFTPD 1.3.0 Server (TinaGarden FTPD) [192.168.5.231]
User (192.168.5.231:(none)): admin
331 Password required for admin.
Password:
230 User admin logged in.
ftp>
*** 问题 7 ***
板子做telnet服务器,从客户端telnet到板子上时,无法登录
提示信息如下:
[root@flexserv Rootfs]# telnet 192.168.5.231
Trying 192.168.5.231...
Connected to 192.168.5.231.
Escape character is '^]'.
Connection closed by foreign host.
开启telnetd服务器的方式有两种:
第一种方式: 通过inetd启动telnetd服务
必须这样设置busybox配置
Networking Utilities --->
去掉 [ ] Support standalone telnetd (not inetd only)
配置/etc/inetd.conf
[root@TinaGarden ~]# vi /etc/inetd.conf
telnet stream tcp nowait root /usr/sbin/telnetd telnetd
运行命令:
/usr/sbin/inetd
第二种方式:直接运行telnetd,启动服务
必须这样设置busybox配置:
Networking Utilities --->
选择 [*] Support standalone telnetd (not inetd only)
运行命令:
/usr/sbin/telnetd
可能出现的问题
1)客户端登录不上,查看/var/log/message,得到如下信息:
cat /var/log/message
Nov 18 10:04:11 TinaGarden daemon.err telnetd[1442]: bind: Address already in use
解决方法:
修改busybox的配置
Networking Utilities --->
去掉 [ ] Support standalone telnetd (not inetd only)
cat /var/log/message
Nov 18 11:48:50 TinaGarden daemon.err telnetd[1782]: can't find free pty
解决方法一:
修改busybox配置
Busybox Settings --->
General Configuration --->
去掉[ ] Use the devpts filesystem for Unix98 PTYs
解决方法二:
mkdir /dev/pts
mount -t devpts devpts /dev/pts //将devpts文件系统加载在/dev/pst
mknod -m 666 /dev/ptmx c 5 2 //使用telnetd所必须的设备文件节点
修改/etc/securetty,增加如下行:
# psudo terminals used by telnet
pts/0
pts/1
pts/2
pts/3
pts/4
pts/5
pts/6
pts/7
经过上述修改后, 客户端应该可以telnet到板子上,信息如下:
在192.168.5.17上运行telnet:(板子ip:192.168.5.231)
在客户端运行命令:
telnet 192.168.5.231
即出现如下登录提示信息:
Welcome to TinaGarden!
TinaGarden login: root
Password:
[root@TinaGarden ~]#
调试过程如下:
1525 root 2712 S /usr/sbin/inetd
1557 root 2644 R ps
[root@TinaGarden /var/log]# netstat -ant
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:49154 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:49155 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:139 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:21 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:23 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:445 0.0.0.0:* LISTEN
tcp 0 0 ::%1278820:80 ::%1300168:* LISTEN
[root@TinaGarden /var/log]# kill 1525
[root@TinaGarden /var/log]# netstat -ant
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:49154 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:49155 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:139 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:21 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:445 0.0.0.0:* LISTEN
tcp 0 0 ::%1278820:80 ::%1300168:* LISTEN
[root@TinaGarden /var/log]# /usr/sbin/inetd
[root@TinaGarden /var/log]# netstat -ant
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:49154 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:49155 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:139 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:21 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:23 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:445 0.0.0.0:* LISTEN
tcp 0 0 ::%1278820:80 ::%1300168:* LISTEN
[root@TinaGarden ~]# netstat -lt
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:49154 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:49155 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:netbios-ssn 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:ftp 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:telnet 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:microsoft-ds 0.0.0.0:* LISTEN
tcp 0 0 ::%1278820:http ::%1300168:* LISTEN
说明23号端口,即telnetd已经在监听 ,telet服务已经开启