在Linux Shell scripts下变量如何取linux的命令运行值

#!/bin/bash
d='date'
echo $d

为什么显示date,而不是当前日期
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d='date'出错,date不是用单引号引起来,而是键,也就是Esc下面,1前面的那个键 d=date`
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#!/bin/bash
d=date #反引号
echo $d

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