无需解压巨大的 zip 文件即可显示巨大的 txt/json 文件的内容

无需解压巨大的 zip 文件即可显示巨大的 txt/json 文件的内容

我得到了一个~400MB 的 zip 文件,其中有一些大小大约在 400MB - 1GB 范围内的 txt/json 文件。

我只是想查看目标文件的前 100 行,而不必从 zip 中提取它,也不会占用太多内存。(非常低)

或者是否有一个选项可以拆分 zip 中的目标文件,而无需提取并按顺序执行,即,当给出split50MB 的命令时,例如,我只获得第一个拆分文件,查看它,然后继续拆分第二个文件,查看它,继续拆分第三个 50MB 的文件,查看它,一次又一次?

答案1

好的,步骤如下:

  1. 要获取存档中您想要查看其内容的文件的名称,请使用以下命令列出(zip 文件)的内容:

    unzip -l file.zip
    
  2. 现在查看第一100行:

    unzip -c file.zip file/name_of_file_of_interest.json | head -100
    

笔记:

  1. 这种格式

    unzip -c file.zip file/name_of_file_of_interest.json
    

    是需要的,不是

    unzip -c file.zip name_of_file_of_interest.json
    

    获取文件的路径,运行命令时将获取该路径step 1

例子:

  1. 文件unzip -l wordpress-4.7.zip,产生

     ...
     0  2016-12-06 19:40   wordpress/wp-includes/Text/Diff/Renderer/
     5535  2010-02-19 02:25   wordpress/wp-includes/Text/Diff/Renderer/inline.php
     6813  2015-06-28 16:27   wordpress/wp-includes/Text/Diff/Renderer.php
    12950  2015-06-28 16:27   wordpress/wp-includes/Text/Diff.php
    14460  2016-12-02 08:11   wordpress/wp-includes/class-wp-hook.php
    34760  2016-12-01 03:19   wordpress/wp-includes/rest-api.php
    23621  2016-11-21 03:46   wordpress/wp-includes/update.php
    102116  2016-12-04 21:37   wordpress/wp-includes/comment.php
    14066  2016-08-25 18:37   wordpress/wp-includes/class-wp-text-diff-renderer-table.php
    2853  2015-12-16 10:58   wordpress/wp-config-sample.php
    
  2. 现在我想查看100文件的第一行wp-config-sample.phpwordpress-4.7.zip因此我执行以下操作:

    unzip -p wordpress-4.7.zip wordpress/wp-config-sample.php | head -100
    

更多信息:

  1. 为什么使用-p选项:

     -p     extract files to pipe (stdout).  Nothing but the file data is sent to stdout, and the files are  always
          extracted in binary format, just as they are stored (no conversions).
    

更优雅的输出是less

less wordpress-4.7.zip

# OUTPUT

    Archive:  wordpress-4.7.zip
 Length   Method    Size  Cmpr    Date    Time   CRC-32   Name
--------  ------  ------- ---- ---------- ----- --------  ----
       0  Stored        0   0% 2016-12-06 19:40 00000000  wordpress/
   16250  Defl:X     4157  74% 2016-11-29 06:39 2b3bf692  wordpress/wp-settings.php
    3286  Defl:X     1397  58% 2015-05-24 18:26 e732ef29  wordpress/wp-cron.php
    1627  Defl:X      799  51% 2016-08-29 13:00 d0339e89  wordpress/wp-comments-post.php
    5447  Defl:X     2006  63% 2016-09-27 22:36 888ccd8b  wordpress/wp-activate.php
       0  Stored        0   0% 2016-12-06 19:40 00000000  wordpress/wp-admin/
    2401  Defl:X      933  61% 2016-10-24 05:45 1e03d7a9  wordpress/wp-admin/link-parse-opml.php
       0  Stored        0   0% 2016-12-06 19:40 00000000  wordpress/wp-admin/js/
   12000  Defl:X     3291  73% 2016-09-13 07:03 77f8b8cb  wordpress/wp-admin/js/editor.js
    6224  Defl:X     2215  64% 2016-11-03 06:40 693a34f0  wordpress/wp-admin/js/user-profile.min.js
    1508  Defl:X      640  58% 2015-07-27 12:19 ee45bde7  wordpress/wp-admin/js/word-count.min.js
    5148  Defl:X     2010  61% 2016-11-17 19:28 2384dae7  wordpress/wp-admin/js/tags-suggest.js
    6842  Defl:X     2399  65% 2016-10-23 19:16 41742fcd  wordpress/wp-admin/js/tags-box.js
   17717  Defl:X     5102  71% 2016-07-05 14:37 93dfd6b0  wordpress/wp-admin/js/image-edit.js
   34299  Defl:X     7077  79% 2016-11-04 18:18 97b89baa  wordpress/wp-admin/js/updates.min.js
    4192  Defl:X     1539  63% 2016-06-08 23:37 b8c4c822  wordpress/wp-admin/js/postbox.min.js
   20983  Defl:X     6187  71% 2016-11-03 06:40 3aec32c2  wordpress/wp-admin/js/nav-menu.min.js
   25330  Defl:X     7009  72% 2016-11-03 06:40 43591b6e  wordpress/wp-admin/js/theme.min.js
    1502  Defl:X      707  53% 2013-11-14 06:40 4dc0acc0  wordpress/wp-admin/js/custom-header.js
   11462  Defl:X     4344  62% 2016-11-03 06:40 0aa95325  wordpress/wp-admin/js/press-this.min.js

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