[Linux] shell script to modify default compiler

Recent small series of ubuntu compile environmental problems, leading to reload. Upgrade from version 12.04 to 16.04. Resulting in many incompatibility problems, the following shell script to talk about the problem of incompatibility

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Problems such as:

        "[: XXXX: unexpected operator" issue

solution:

The interpreter Ubuntu connected to modify the default bash

sudo dpkg-reconfigure dash

Select No enough. This completes the handover to the bash.