Busybox · DOCKER

## Busybox ### 简介 ![](https://box.kancloud.cn/a200c2b43fcfa383ff59e090fcb85aa4_164x116.png) BusyBox 是一个集成了一百多个最常用 Linux 命令和工具（如 cat、echo、grep、mount、telnet 等）的精简工具箱，它只需要几 MB 的大小，很方便进行各种快速验证，被誉为“Linux 系统的瑞士军刀”。 BusyBox 可运行于多款 POSIX 环境的操作系统中，如 Linux（包括 Android）、Hurd、FreeBSD 等。 ### 获取官方镜像在 Docker Hub 中搜索 busybox 相关的镜像。 ``` <pre class="prettyprint"><ol class="linenums"><li class="l"><code class="pcalibre10 pcalibre11 pcalibre9">$ docker search busybox</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9">NAME DESCRIPTION STARS OFFICIAL AUTOMATED</code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9">busybox Busybox base image. 755 [OK]</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9">progrium/busybox 63 [OK]</code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9">radial/busyboxplus Full-chain, Internet enabled, busybox made... 11 [OK]</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9">odise/busybox-python 3 [OK]</code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9">multiarch/busybox multiarch ports of ubuntu-debootstrap 2 [OK]</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9">azukiapp/busybox This image is meant to be used as the base... 2 [OK]</code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9">...</code></li> </ol> ``` 读者可以看到最受欢迎的镜像同时带有 OFFICIAL 标记，说明它是官方镜像。用户使用 docker pull 指令下载镜像 `busybox:latest`： ``` <pre class="prettyprint"><ol class="linenums"><li class="l"><code class="pcalibre10 pcalibre11 pcalibre9">$ docker pull busybox:latest</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9">busybox:latest: The image you are pulling has been verified</code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9">e433a6c5b276: Pull complete</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9">e72ac664f4f0: Pull complete</code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9">511136ea3c5a: Pull complete</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9">df7546f9f060: Pull complete</code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9">Status: Downloaded newer image for busybox:latest</code></li> </ol> ``` 下载后，可以看到 busybox 镜像只有2.433 MB： ``` <pre class="prettyprint"><ol class="linenums"><li class="l"><code class="pcalibre10 pcalibre11 pcalibre9">$ docker image ls</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9">REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE</code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9">busybox latest e72ac664f4f0 6 weeks ago 2.433 MB</code></li> </ol> ``` ### 运行 busybox 启动一个 busybox 容器，并在容器中执行 grep 命令。 ``` <pre class="prettyprint"><ol class="linenums"><li class="l"><code class="pcalibre10 pcalibre11 pcalibre9">$ docker run -it busybox</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9">/ # grep</code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9">BusyBox v1.22.1 (2014-05-22 23:22:11 UTC) multi-call binary.</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9">Usage: grep [-HhnlLoqvsriwFE] [-m N] [-A/B/C N] PATTERN/-e PATTERN.../-f FILE [FILE]...</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9">Search for PATTERN in FILEs (or stdin)</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"></code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"> -H Add 'filename:' prefix</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"> -h Do not add 'filename:' prefix</code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"> -n Add 'line_no:' prefix</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"> -l Show only names of files that match</code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"> -L Show only names of files that don't match</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"> -c Show only count of matching lines</code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"> -o Show only the matching part of line</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"> -q Quiet. Return 0 if PATTERN is found, 1 otherwise</code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"> -v Select non-matching lines</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"> -s Suppress open and read errors</code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"> -r Recurse</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"> -i Ignore case</code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"> -w Match whole words only</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"> -x Match whole lines only</code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"> -F PATTERN is a literal (not regexp)</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"> -E PATTERN is an extended regexp</code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"> -m N Match up to N times per file</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"> -A N Print N lines of trailing context</code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"> -B N Print N lines of leading context</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"> -C N Same as '-A N -B N'</code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9"> -e PTRN Pattern to match</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9"> -f FILE Read pattern from file</code></li> </ol> ``` 查看容器内的挂载信息。 ``` <pre class="prettyprint"><ol class="linenums"><li class="l"><code class="pcalibre10 pcalibre11 pcalibre9">/ # mount</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9">rootfs on / type rootfs (rw)</code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9">none on / type aufs (rw,relatime,si=b455817946f8505c)</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9">proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)</code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9">tmpfs on /dev type tmpfs (rw,nosuid,mode=755)</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9">shm on /dev/shm type tmpfs (rw,nosuid,nodev,noexec,relatime,size=65536k)</code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9">devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=666)</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9">sysfs on /sys type sysfs (ro,nosuid,nodev,noexec,relatime)</code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9">/dev/disk/by-uuid/b1f2dba7-d91b-4165-a377-bf1a8bed3f61 on /etc/resolv.conf type ext4 (rw,relatime,errors=remount-ro,data=ordered)</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9">/dev/disk/by-uuid/b1f2dba7-d91b-4165-a377-bf1a8bed3f61 on /etc/hostname type ext4 (rw,relatime,errors=remount-ro,data=ordered)</code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9">/dev/disk/by-uuid/b1f2dba7-d91b-4165-a377-bf1a8bed3f61 on /etc/hosts type ext4 (rw,relatime,errors=remount-ro,data=ordered)</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9">devpts on /dev/console type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)</code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9">proc on /proc/sys type proc (ro,nosuid,nodev,noexec,relatime)</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9">proc on /proc/sysrq-trigger type proc (ro,nosuid,nodev,noexec,relatime)</code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9">proc on /proc/irq type proc (ro,nosuid,nodev,noexec,relatime)</code></li> <li class="l1"><code class="pcalibre10 pcalibre11 pcalibre9">proc on /proc/bus type proc (ro,nosuid,nodev,noexec,relatime)</code></li> <li class="l"><code class="pcalibre10 pcalibre11 pcalibre9">tmpfs on /proc/kcore type tmpfs (rw,nosuid,mode=755)</code></li> </ol> ``` busybox 镜像虽然小巧，但包括了大量常见的 Linux 命令，读者可以用它快速熟悉 Linux 命令。 ### 相关资源 - `Busybox` 官网：<https://busybox.net/> - `Busybox` 官方仓库：<https://git.busybox.net/busybox/> - `Busybox` 官方镜像：[https://hub.docker.com/\_/busybox/](https://hub.docker.com/_/busybox/) - `Busybox` 官方仓库：<https://github.com/docker-library/busybox>