- 命令替换，使得可以捕获一个命令的输出而在另一个命令中替换它。
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command substitution中文什么意思
例句与用法
- Alternatively you can use the octal form of the control code , " - 033 " , but the prompt setting doesn t understand this syntax itself , so you have to use " echo " and command substitution , as shown in the next example
当然也可以使用八进制格式的控制码， " 033 " ，但是prompt设置并不能够理解这个语法本身，所以您得使用" echo "和命令替换，如下例所示：
百科释义
In computing, command substitution is a facility originally introduced in the Unix shells that allows a command to be run and its output to be pasted back on the command line as arguments to another command. Shells typically do this by creating a child process to run the first command with its standard output piped back to the shell, which reads that output, parsing it into words separated by whitespace.
详细百科解释