Question

我必须创建50个文件夹，每个第五个文件夹中应包含2 * 2个文件，例如

folder1
.
.
folder5 - has 2 files in it
folder 6
.
.
folder 10 - has 4 files in it 
.
.
folder 15 - has 8 files in it

这是我的代码：

#!/bin/bash


n=1 
declare -i countFolder

for (( countFolder = 1; countFolder <= 50; countFolder++ )) 
do 
    mkdir Folder$countFolder
done

for (( countFolder = 5; countFolder <= 50; countFolder = countFolder+5 ))
do

    let "n = n * 2"

    for (( f = 0; f < n; f++ )) do
    cd Folder$countFolder && touch File$f.txt
    done
done

Answer 1

这个问题是你cd进入了一个目录，但你永远不会cd回来。

解决此问题的最简单方法是在cd周围添加括号。这些括号开始一个子shell，因此cd保留在其中：

for (( f = 0; f < n; f++ )) do
  ( cd Folder$countFolder && touch File$f.txt ) 
done

这相当于但比手动cd ..更短：

for (( f = 0; f < n; f++ )) do
  cd Folder$countFolder && { touch File$f.txt; cd ..; }
done

Answer 2

您需要进入目录，制作文件，然后离开。最有效的方法如下：

#!/bin/bash


n=1 
declare -i countFolder

for (( countFolder = 1; countFolder <= 50; countFolder++ )) 
do 
    mkdir Folder$countFolder
    ls
done

for (( countFolder = 5; countFolder <= 50; countFolder = countFolder+5 ))
do

    let "n = n * 2"
    cd Folder$countFolder
    for (( f = 0; f < n; f++ )) do
        touch File$f.txt
    done
    cd ..
done

使用bash脚本创建文件夹和文件

2 个答案: