mirror of
https://github.com/yeasy/docker_practice.git
synced 2024-11-01 12:13:38 +00:00
114 lines
4.8 KiB
Markdown
114 lines
4.8 KiB
Markdown
## Busybox
|
||
|
||
### 简介
|
||
|
||
|
||
|
||
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。
|
||
|
||
```bash
|
||
$ docker search busybox
|
||
NAME DESCRIPTION STARS OFFICIAL AUTOMATED
|
||
busybox Busybox base image. 755 [OK]
|
||
progrium/busybox 63 [OK]
|
||
radial/busyboxplus Full-chain, Internet enabled, busybox made... 11 [OK]
|
||
odise/busybox-python 3 [OK]
|
||
multiarch/busybox multiarch ports of ubuntu-debootstrap 2 [OK]
|
||
azukiapp/busybox This image is meant to be used as the base... 2 [OK]
|
||
...
|
||
```
|
||
|
||
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`：
|
||
|
||
```bash
|
||
$ docker pull busybox:latest
|
||
busybox:latest: The image you are pulling has been verified
|
||
e433a6c5b276: Pull complete
|
||
e72ac664f4f0: Pull complete
|
||
511136ea3c5a: Pull complete
|
||
df7546f9f060: Pull complete
|
||
Status: Downloaded newer image for busybox:latest
|
||
```
|
||
|
||
下载后，可以看到 busybox 镜像只有2.433 MB：
|
||
|
||
```bash
|
||
$ docker image ls
|
||
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
|
||
busybox latest e72ac664f4f0 6 weeks ago 2.433 MB
|
||
```
|
||
|
||
### 运行 busybox
|
||
|
||
启动一个 busybox 容器，并在容器中执行 grep 命令。
|
||
|
||
```bash
|
||
$ docker run -it busybox
|
||
/ # grep
|
||
BusyBox v1.22.1 (2014-05-22 23:22:11 UTC) multi-call binary.
|
||
|
||
Usage: grep [-HhnlLoqvsriwFE] [-m N] [-A/B/C N] PATTERN/-e PATTERN.../-f FILE [FILE]...
|
||
|
||
Search for PATTERN in FILEs (or stdin)
|
||
|
||
-H Add 'filename:' prefix
|
||
-h Do not add 'filename:' prefix
|
||
-n Add 'line_no:' prefix
|
||
-l Show only names of files that match
|
||
-L Show only names of files that don't match
|
||
-c Show only count of matching lines
|
||
-o Show only the matching part of line
|
||
-q Quiet. Return 0 if PATTERN is found, 1 otherwise
|
||
-v Select non-matching lines
|
||
-s Suppress open and read errors
|
||
-r Recurse
|
||
-i Ignore case
|
||
-w Match whole words only
|
||
-x Match whole lines only
|
||
-F PATTERN is a literal (not regexp)
|
||
-E PATTERN is an extended regexp
|
||
-m N Match up to N times per file
|
||
-A N Print N lines of trailing context
|
||
-B N Print N lines of leading context
|
||
-C N Same as '-A N -B N'
|
||
-e PTRN Pattern to match
|
||
-f FILE Read pattern from file
|
||
```
|
||
|
||
查看容器内的挂载信息。
|
||
|
||
```bash
|
||
/ # mount
|
||
rootfs on / type rootfs (rw)
|
||
none on / type aufs (rw,relatime,si=b455817946f8505c)
|
||
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
|
||
tmpfs on /dev type tmpfs (rw,nosuid,mode=755)
|
||
shm on /dev/shm type tmpfs (rw,nosuid,nodev,noexec,relatime,size=65536k)
|
||
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=666)
|
||
sysfs on /sys type sysfs (ro,nosuid,nodev,noexec,relatime)
|
||
/dev/disk/by-uuid/b1f2dba7-d91b-4165-a377-bf1a8bed3f61 on /etc/resolv.conf type ext4 (rw,relatime,errors=remount-ro,data=ordered)
|
||
/dev/disk/by-uuid/b1f2dba7-d91b-4165-a377-bf1a8bed3f61 on /etc/hostname type ext4 (rw,relatime,errors=remount-ro,data=ordered)
|
||
/dev/disk/by-uuid/b1f2dba7-d91b-4165-a377-bf1a8bed3f61 on /etc/hosts type ext4 (rw,relatime,errors=remount-ro,data=ordered)
|
||
devpts on /dev/console type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
|
||
proc on /proc/sys type proc (ro,nosuid,nodev,noexec,relatime)
|
||
proc on /proc/sysrq-trigger type proc (ro,nosuid,nodev,noexec,relatime)
|
||
proc on /proc/irq type proc (ro,nosuid,nodev,noexec,relatime)
|
||
proc on /proc/bus type proc (ro,nosuid,nodev,noexec,relatime)
|
||
tmpfs on /proc/kcore type tmpfs (rw,nosuid,mode=755)
|
||
```
|
||
|
||
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/
|
||
* `Busybox` 官方仓库：https://github.com/docker-library/busybox
|