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SoloCompany 2017-04-26 00:15:08 +08:00
加引号
http://www.gnu.org/software/bash/manual/html_node/Bourne-Shell-Builtins.html#index-test The test and [ builtins evaluate conditional expressions using a set of rules based on the number of arguments. 0 arguments The expression is false. 1 argument The expression is true if and only if the argument is not null. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
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SmartDancer OP @SoloCompany thank you! 请教一下这个问题如何 google 关键词!
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