bash:仅提取tar.gz归档文件的一部分 [英] bash: extract only part of tar.gz archive

问题描述

我有一个大 .tar.gz 文件，由于空间不足，我无法将其全部提取出来.我想提取 一半其内容，对其进行处理，然后提取剩余的一半.

I have a very large .tar.gz file which I can't extract all together because of lack of space. I would like to extract half of its contents, process them, and then extract the remaining half.

档案包含几个子目录，这些子目录又包含文件.提取子目录时，需要 all 的所有内容才能与之一起提取.

The archive contains several subdirectories, which in turn contain files. When I extract a subdirectory, I need all its contents to be extracted with it.

在 bash 中执行此操作的最佳方法是什么? tar 已经允许了吗?

What's the best way of doing this in bash? Does tar already allow this?

推荐答案

好，所以根据此答案，我可以列出所需深度的所有内容.就我而言，tar.gz文件的结构如下:

OK, so based on this answer, I can list all contents at the desired depth. In my case, the tar.gz file is structured as follows:

archive.tar.gz:
archive/
archive/a/
archive/a/file1
archive/a/file2
archive/a/file3
archive/b/
archive/b/file4
archive/b/file5
archive/c/
archive/c/file6

因此，我想遍历子目录 a，b，c ，例如，提取其中的前两个:

So I want to loop over subdirectories a, b, c and, for instance extract the first two of them:

parent_folder='archive/'
max_num=2
counter=0
mkdir $parent_folder
for subdir in `tar --exclude="*/*/*" -tf archive.tar.gz`; do
    if [ "$subdir" = "$parent_folder" ];
    then
        echo 'not this one'
        continue        
    fi
    if [ "$counter" -lt "$max_num" ];
    then
        tar zxvf archive.tar.gz $subdir -C ./${parentfolder}${subdir}
        counter=$((counter + 1))
    fi
done

接下来，对于其余文件:

Next, for the remaining files:

max_num=2
counter=0
mkdir $parent_folder
for subdir in `tar --exclude="*/*/*" -tf files.tar.gz`; do
    if [ "$subdir" = "$parent_folder" ];
    then
        echo 'not this one'
        continue        
    fi
    if [ "$counter" -ge "$max_num" ];
    then
        tar zxvf files.tar.gz $subdir -C ./${parent_folder}$subdir
    fi
    counter=$((counter + 1))
done

这篇关于bash:仅提取tar.gz归档文件的一部分的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！