linux - 使用 bash 脚本创建文件夹和文件

Question

我必须创建 50 个文件夹，每五个文件夹中应该有 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

问题在于您cd 进入一个目录，但您永远不会cd 返回。

解决此问题的最简单方法是在 cd 两边添加括号。这些括号开始一个子 shell，因此 cd 留在其中:

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

这等同于但短于手动cd ..:

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