安装交叉编译器出问题了，
./arm-2010q1-202-arm-none-linux-gnueabi.bin
错误信息如下；
Checking for required programs: awk grep sed bzip2 gunzip===============================================================Error: DASH shell not supported as system shell===============================================================The installer has detected that your system uses the dash shellas /bin/sh. This shell is not supported by the installer.You can work around this problem by changing /bin/sh to be asymbolic link to a supported shell such as bash.For example, on Ubuntu systems, execute this shell command: % sudo dpkg-reconfigure -plow dash Install as /bin/sh? NoPlease refer to the Getting Started guide for more information,or contact CodeSourcery Support for assistance.
Google搜：
http://www.51testing.com/html/38/225738-208702.html
Ubuntu下sh默认指向dash 。echo $SHELL --> /bin/bashtype sh --> /bin/sh然后我到/bin下看了有"sh -> dash"，原来sh是/bin/dash的链接。后来google了一下才发现，buntu6.10已将先前默认的bashshell更换为了dash。其表现是/bin/sh链接到了/bin/dash而不是传统的/bin/bash。bash - GNU Bourne-Again SHelldash - Debian Almquist Shell可以分别man bash / man dash看一下。那么怎么把sh改为指向bash呢？最暴力的方法当然是直接把/bin/sh的软链接改到bash中，如：ln -s /bin/bash /bin/sh但是，有优雅一些的方法,sudo dpkg-reconfigure dash出现菜单问你是否要dash的时候，选no就可以了。
先看看链接：
cuigang@cui:~$ ls -l /bin/shlrwxrwxrwx 1 root root 4 2010-10-12 17:04 /bin/sh -> dash
按照出错的提示信息
sudo dpkg-reconfigure -plow dash Install as /bin/sh? No
就可以了，再看看链接：
cuigang@cui:~$ ls -l /bin/shlrwxrwxrwx 1 root root 4 2010-10-12 16:52 /bin/sh -> bash
那么Dash是什么东西呢
DASH is a POSIX-compliant implementation of /bin/sh that aims to be as small as possible. It does this without sacrificing speed where possible. In fact, it is significantly faster than bash (the GNU Bourne-Again SHell) for most tasks.
比bash小而快的东西
