Ubuntu的apt-file解决依赖问题

本文介绍了如何在Ubuntu系统中利用apt-file工具解决软件包依赖问题。包括安装apt-file,搜索缺失文件所在包并安装,以及查看指定包内含文件等操作。

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文章作者:Tyan
博客:noahsnail.com  |  优快云  |  简书

1. 背景

平常我们在安装应用时,经常会碰到缺少各种文件、依赖等问题,例如缺少.so文件。Ubuntu中提供了一个强大的工具apt-file来查找依赖。最适合的场景是在Docker中使用,因为Docker Image的系统通常是Ubuntu。

2. 安装

apt-file的安装命令如下:

# Install
$ apt-get update
$ apt-get install apt-file

# Update apt-file
$ apt-file update

3. 搜索缺少的文件

如果缺少cv.py文件,则搜索cv.py文件,apt-file会列出包含cv.py的包,发现需要的包是python-opencv,然后安装ython-opencv

# 命令格式
$ apt-file seach [filename]

# Demo
$ apt-file search cv.py
gnuradio: /usr/lib/python2.7/dist-packages/gnuradio/analog/wfm_rcv.py
gnuradio: /usr/share/gnuradio/examples/uhd/usrp_am_mw_rcv.py
gnuradio: /usr/share/gnuradio/examples/uhd/usrp_nbfm_rcv.py
gnuradio: /usr/share/gnuradio/examples/uhd/usrp_tv_rcv.py
gnuradio: /usr/share/gnuradio/examples/uhd/usrp_wfm_rcv.py
gnuradio: /usr/share/gnuradio/examples/uhd/usrp_wxapt_rcv.py
libqpid-proton2-dev-examples: /usr/share/proton-0.10/examples/python/db_recv.py
libqpid-proton2-dev-examples: /usr/share/proton-0.10/examples/python/direct_recv.py
libqpid-proton2-dev-examples: /usr/share/proton-0.10/examples/python/messenger/recv.py
libqpid-proton2-dev-examples: /usr/share/proton-0.10/examples/python/reactor/recv.py
libqpid-proton2-dev-examples: /usr/share/proton-0.10/examples/python/selected_recv.py
libqpid-proton2-dev-examples: /usr/share/proton-0.10/examples/python/simple_recv.py
libqpid-proton2-dev-examples: /usr/share/proton-0.10/examples/python/tx_recv.py
lowpan-test-tools: /usr/lib/x86_64-linux-gnu/lowpan-tools/test_recv.py
python-kivy: /usr/lib/python2.7/dist-packages/kivy/core/camera/camera_opencv.py
python-mvpa2-doc: /usr/share/doc/python-mvpa2-doc/examples/nested_cv.py
python-opencv: /usr/lib/python2.7/dist-packages/cv.py
python-pyavm: /usr/lib/python2.7/dist-packages/pyavm/cv.py
python-pysnmp4: /usr/lib/python2.7/dist-packages/pysnmp/entity/rfc3413/ntfrcv.py
python-pysnmp4: /usr/share/pyshared/pysnmp/entity/rfc3413/ntfrcv.py
python-pysnmp4-doc: /usr/share/doc/python-pysnmp4-doc/examples/v1arch/manager/ntfrcv.py
python-scapy: /usr/lib/python2.7/dist-packages/scapy/sendrecv.py
python-scapy: /usr/share/pyshared/scapy/sendrecv.py
python3-kivy: /usr/lib/python3/dist-packages/kivy/core/camera/camera_opencv.py
python3-pyavm: /usr/lib/python3/dist-packages/pyavm/cv.py
python3-pysnmp4: /usr/lib/python3/dist-packages/pysnmp/entity/rfc3413/ntfrcv.py

4. 列出包中的文件

查看python-opencv中的文件。

# 命令格式
$ apt-file list [package name]

# Demo
$ apt-file list python-opencv
python-opencv: /usr/lib/python2.7/dist-packages/cv.py
python-opencv: /usr/lib/python2.7/dist-packages/cv2.x86_64-linux-gnu.so
python-opencv: /usr/share/doc/python-opencv/changelog.Debian.gz
python-opencv: /usr/share/doc/python-opencv/copyright
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/__init__.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/cfg/CamShiftConfig.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/cfg/ContourMomentsConfig.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/cfg/ConvexHullConfig.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/cfg/EdgeDetectionConfig.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/cfg/FBackFlowConfig.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/cfg/FaceDetectionConfig.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/cfg/FindContoursConfig.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/cfg/GeneralContoursConfig.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/cfg/GoodfeatureTrackConfig.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/cfg/HoughCirclesConfig.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/cfg/HoughLinesConfig.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/cfg/LKFlowConfig.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/cfg/PeopleDetectConfig.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/cfg/PhaseCorrConfig.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/cfg/SegmentObjectsConfig.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/cfg/SimpleFlowConfig.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/cfg/WatershedSegmentationConfig.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/cfg/__init__.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_Circle.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_CircleArray.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_CircleArrayStamped.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_Contour.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_ContourArray.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_ContourArrayStamped.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_Face.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_FaceArray.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_FaceArrayStamped.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_Flow.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_FlowArray.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_FlowArrayStamped.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_FlowStamped.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_Line.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_LineArray.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_LineArrayStamped.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_Moment.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_MomentArray.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_MomentArrayStamped.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_Point2D.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_Point2DArray.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_Point2DArrayStamped.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_Point2DStamped.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_Rect.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_RectArray.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_RectArrayStamped.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_RotatedRect.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_RotatedRectArray.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_RotatedRectArrayStamped.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_RotatedRectStamped.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_Size.py
python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/msg/__init__.py
python-opencv-apps: /usr/share/doc/python-opencv-apps/changelog.Debian.gz
python-opencv-apps: /usr/share/doc/python-opencv-apps/copyright

5. 其它系统

在其它系统中,例如CentOS中,可以用yum whatprovides命令来查询命令所在的包。

### Ubuntu 系统中使用 `apt-get` 进行离线安装包的方法 在 Ubuntu 中实现 `apt-get` 的离线安装可以通过多种方式完成,以下是几种常见且有效的方法: #### 方法一:利用 `apt-offline` `apt-offline` 是一个专门用于处理离线环境的工具,可以用来生成所需的依赖列表并下载这些依赖。 1. **安装 `apt-offline` 工具** 在联网环境中先安装此工具: ```bash sudo apt update && sudo apt install apt-offline ``` 2. **生成签名文件** 在目标离线机器上运行以下命令以生成签名文件: ```bash sudo apt-offline set /path/to/signature-file.sig --update --upgrade ``` 此处 `/path/to/signature-file.sig` 表示保存签名文件的位置[^1]。 3. **传输签名文件至联网设备** 使用 U 盘或其他存储介质将签名文件复制到有网络连接的计算机上。 4. **下载更新数据** 在联网设备上运行以下命令以下载所需的数据包: ```bash apt-offline get signature-file.sig --bundle bundle.zip ``` 所需的所有文件会被打包成 `bundle.zip` 文件[^2]。 5. **应用更新到离线机器** 将 `bundle.zip` 文件传回离线机器,并执行以下命令: ```bash sudo apt-offline install bundle.zip ``` 之后即可正常进行升级或安装操作。 --- #### 方法二:手动下载 `.deb` 包及其依赖项 如果不想使用额外工具,则可采用如下流程手动解决依赖关系问题。 1. **收集依赖信息** 利用一台能够访问互联网的工作站查询目标程序以及其所有依赖项的信息。例如: ```bash apt-cache depends package-name ``` 或者更精确的方式是模拟安装过程查看具体需求: ```bash apt-get -s install package-name ``` 2. **批量下载 .deb 文件** 基于上述分析结果,在另一台具备网络条件的 PC 上逐一抓取对应版本号的 deb 软件包。推荐借助 `wget` 或其他 HTTP 客户端从官方镜像站点获取资源链接地址。 另外也可以尝试直接调用下面这条指令一次性拉取主组件连同附属子部件一起存放到指定路径下供后续迁移用途: ```bash apt download $(apt rdepends package_name | grep -v Reverse) ``` 3. **部署到无网终端** 把先前累积下来的成果转移过去给待配置实体加载进来形成可用状态即告成功结束整个环节工作流。 --- #### 方法三:构建本地APT仓库 对于频繁需要维护多个相同架构类型的节点场合来说建立专属定制化私密型 APT 存储库不失为一种高效长久之计。 1. 准备阶段——挑选合适位置作为根目录存放各类已采集完毕的标准格式压缩文档形式呈现出来的索引清单档案; 2. 构建索引结构体系——运用诸如 `dpkg-scanpackages` 类实用脚本生成符合标准协议规定的描述性元数据记录条目集合体; 3. 设置源指向规则说明——修改客户端侧 configuration file 加入新增加好的自定义 URI 地址入口从而达成无缝衔接效果表现出来。 --- ```python import os def create_local_repo(repo_path, packages_dir): """ Create a local repository by scanning the given directory of Debian packages. Args: repo_path (str): Path to store the generated Packages.gz. packages_dir (str): Directory containing all downloaded .deb files. Returns: None """ if not os.path.exists(packages_dir): raise FileNotFoundError(f"The specified packages directory does not exist: {packages_dir}") command = f"cd {repo_path} && dpkg-scanpackages {packages_dir} /dev/null | gzip > Packages.gz" os.system(command) create_local_repo("/var/local-repo", "/path/to/downloaded/packages/") ```
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