多谢两位！
话说我如果事先不知道这个feature的话，我怎么可以搜索出来呢？

【 在 RuralHunter 的大作中提到: 】
: 对的：
: The Unix C shell hashes your search path directories to help it find executables faster. But it develops blind spots if you add new executables to those directories after it's already done its hash. The solution is to use the rehash command to tell it to rebuild its hash. Alternately, you can turn off the path hash entirely (taking a slight performance hit) using the unhash command.
:
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FROM 14.16.155.*