当使用Dash作为默认Shell时，尝试安装Arm交叉编译工具链可能会遇到不兼容的问题。本文介绍了解决该问题的方法，通过配置系统让安装程序能够正常运行。
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。
解决办法：
在命令行下下列命令：
chmod +x arm-2009q1-203-arm-none-linux-gnueabi.bin
sudo dpkg-reconfigure -plow dash
在出现的对话框中选择NO，然后就可以执行“./arm-2009q1-203-arm-none-linux-gnueabi.bin”来安装了。
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