https://chenfu.ai/en/tags/shell/ Recent content in Shell on Fran Kuo | R&D Leadership Hugo -- 0.157.0 en Tue, 25 Sep 2007 00:00:00 +0000 https://chenfu.ai/en/posts/ubuntu-dash-vs-bash/ Tue, 25 Sep 2007 00:00:00 +0000 https://chenfu.ai/en/posts/ubuntu-dash-vs-bash/ <p>To accelerate boot times, Ubuntu moved to using <strong>Dash</strong> (<code>/bin/dash</code>) as the default system shell (<code>/bin/sh</code>), replacing the more feature-rich but slower <strong>Bash</strong>. You can verify this linkage by checking <code>/bin/sh -&gt; /bin/dash</code>.</p> <p>While this is great for system performance, it can cause unexpected failures in shell scripts designed specifically with &ldquo;Bashisms&rdquo; (features unique to Bash). If you need to revert the default shell back to Bash for compatibility reasons, you can execute the following command:</p>