执行./arm-2009q1-203-arm-none-linux-gnueabi.bin命令时，出现如下提示：
The installer has detected that your system uses the dash shell
as /bin/sh. This shell is not supported by the installer.
You can work around this problem by changing /bin/sh to be a
symbolic 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? No
Please refer to the Getting Started guide for more information,
or contact CodeSourcery Support for assistance。
进入/bin，运行 ls -l
发现sh默认指向dash而不是bash，所以只要让sh指向bash就好了，于是删除sh到dash的软链接：
sudo rm -f sh
再建立sh 到bash的软链接：
sudo ln -s /bin/bash /bin/sh
必须要加sudo，否则权限不够.
问题解决！