使用 Calibre 移除电子书中的 DRM

Question

安装 Calibre

Calibre 是一款 Linux 上的电子书管理软件，在 archlinux 下可以直接用 pacman 安装

sudo pacman -S calibre --noconfirm

resolving dependencies...
looking for conflicting packages...

Packages (1) calibre-3.26.1-1

Total Installed Size:  95.67 MiB
Net Upgrade Size:       0.00 MiB

:: Proceed with installation? [Y/n] 
(0/1) checking keys in keyring                     [----------------------]   0%(1/1) checking keys in keyring                     [######################] 100%
(0/1) checking package integrity                   [----------------------]   0%(1/1) checking package integrity                   [######################] 100%
(0/1) loading package files                        [----------------------]   0%(1/1) loading package files                        [######################] 100%
(0/1) checking for file conflicts                  [----------------------]   0%(1/1) checking for file conflicts                  [######################] 100%
(0/1) checking available disk space                [----------------------]   0%(1/1) checking available disk space                [######################] 100%
:: Processing package changes...
(1/1) reinstalling calibre                         [----------------------]   0%(1/1) reinstalling calibre                         [----------------------]   0%(1/1) reinstalling calibre                         [----------------------]   0%(1/1) reinstalling calibre                         [----------------------]   0%(1/1) reinstalling calibre                         [----------------------]   0%(1/1) reinstalling calibre                         [----------------------]   0%(1/1) reinstalling calibre                         [#---------------------]   6%(1/1) reinstalling calibre                         [##--------------------]  11%(1/1) reinstalling calibre                         [###-------------------]  16%(1/1) reinstalling calibre                         [####------------------]  21%(1/1) reinstalling calibre                         [#####-----------------]  27%(1/1) reinstalling calibre                         [########--------------]  37%(1/1) reinstalling calibre                         [#################-----]  80%(1/1) reinstalling calibre                         [####################--]  92%(1/1) reinstalling calibre                         [#####################-]  99%(1/1) reinstalling calibre                         [######################] 100%
:: Running post-transaction hooks...
(1/4) Updating icon theme caches...
(2/4) Arming ConditionNeedsUpdate...
(3/4) Updating the desktop file MIME type cache...
(4/4) Updating the MIME type database...
Unknown media type in type 'all/all'
Unknown media type in type 'all/allfiles'

安装插件

Calibre 本身没有移除 DRM 的能力，需要借助第三方插件来实现：

1、下载 DeDRM_tools

wget https://github.com/apprenticeharper/DeDRM_tools/releases/download/v6.6.1/DeDRM_tools_6.6.1.zip

2、解压 zip 包

unzip -d DeDRM DeDRM_tools_6.6.1.zip

3、启动 Calibre

calibre

4、选择 偏好选项 -> 插件 -> 从文件加载插件

5、选择 DeDRM_calibre_plugin 中的 DeDRM_plugin.zip

6、重启 Calibre

移除 DRM

安装插件后，在添加书籍的时候，Calibre 会自动去掉 DRM。而且无法手工对已经添加的书籍移除 DRM。如果要移除已经添加书籍的 DRM，则需要先把书籍删掉后，在重新添加。