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                >[success] # echo -- 輸出指定內容 1. `echo 輸出內容`,無需選項,只有一個參數,表示要輸出的內容,復雜內容可以用""包圍 ![](https://img.kancloud.cn/5c/f5/5cf5ccafce0b9977d2bbb6e6fb215015_355x85.png) ~~~ `echo pwd`,想輸出當前的工作路徑,但是pwd被作為普通字符輸出了 可以使用,反引號(通常也稱之為飄號)"`" 將其包圍 被 "`" 包圍的內容,會被作為命令執行,而非普通字符 ~~~ ![](https://img.kancloud.cn/2b/41/2b41d4b5e1705cc334a9a4aaf1438bb6_320x85.png) ~~~ echo `pwd` > a.txt 等同 pwd > a.txt ~~~
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