expansion command 扩展命令
This recorded file can be further processed as per requirements using various command options and expansion factor can be set based on the report.
所记录的文件可按照需求使用各种命令选项进一步处理,并可根据报告设置扩展因数。
Because the alias is an expansion and not a replacement, it enables you to continue adding options and arguments to an aliased command.
由于别名是一种展开形式而不是替换,它使您可以继续向别名命令添加选项和参数。
For example, the "! "character is the history expansion character, which bash normally replaces with a previously-typed command.
例如,“ ! ”字符是历史扩展字符,bash通常将其替换为前面输入的命令。
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