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。
在 Docker Hub
中搜索 busybox
相关的镜像。
$ docker search busyboxNAME DESCRIPTION STARS OFFICIAL AUTOMATEDbusybox 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 busybox:latest
镜像:
$ docker pull busybox:latestbusybox:latest: The image you are pulling has been verifiede433a6c5b276: Pull completee72ac664f4f0: Pull complete511136ea3c5a: Pull completedf7546f9f060: Pull completeStatus: Downloaded newer image for busybox:latest
下载后,可以看到 busybox
镜像只有 2.433 MB:
$ docker image lsREPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZEbusybox latest e72ac664f4f0 6 weeks ago 2.433 MB
启动一个 busybox
容器,并在容器中执行 grep
命令。
$ docker run -it busybox/ # grepBusyBox 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。
/ # mountoverlay on / type overlay (rw,relatime,lowerdir=/var/lib/docker/overlay2/l/BOTCI5RF24AMC4A2UWF4N6ZWFP:/var/lib/docker/overlay2/l/TWVP5T5DMKJGXZOROR7CAPWGFP,upperdir=/var/lib/docker/overlay2/801ef0bf6cce35288dbb8fe00a4f9cc47760444693bfdf339ed0bdcf926e12a3/diff,workdir=/var/lib/docker/overlay2/801ef0bf6cce35288dbb8fe00a4f9cc47760444693bfdf339ed0bdcf926e12a3/work)proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)tmpfs on /dev type tmpfs (rw,nosuid,size=65536k,mode=755)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)tmpfs on /sys/fs/cgroup type tmpfs (ro,nosuid,nodev,noexec,relatime,mode=755)cgroup on /sys/fs/cgroup/systemd type cgroup (ro,nosuid,nodev,noexec,relatime,xattr,release_agent=/lib/systemd/systemd-cgroups-agent,name=systemd)cgroup on /sys/fs/cgroup/net_cls,net_prio type cgroup (ro,nosuid,nodev,noexec,relatime,net_cls,net_prio)cgroup on /sys/fs/cgroup/freezer type cgroup (ro,nosuid,nodev,noexec,relatime,freezer)cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (ro,nosuid,nodev,noexec,relatime,cpu,cpuacct)cgroup on /sys/fs/cgroup/cpuset type cgroup (ro,nosuid,nodev,noexec,relatime,cpuset)cgroup on /sys/fs/cgroup/blkio type cgroup (ro,nosuid,nodev,noexec,relatime,blkio)cgroup on /sys/fs/cgroup/perf_event type cgroup (ro,nosuid,nodev,noexec,relatime,perf_event)cgroup on /sys/fs/cgroup/memory type cgroup (ro,nosuid,nodev,noexec,relatime,memory)cgroup on /sys/fs/cgroup/devices type cgroup (ro,nosuid,nodev,noexec,relatime,devices)cgroup on /sys/fs/cgroup/pids type cgroup (ro,nosuid,nodev,noexec,relatime,pids)mqueue on /dev/mqueue type mqueue (rw,nosuid,nodev,noexec,relatime)shm on /dev/shm type tmpfs (rw,nosuid,nodev,noexec,relatime,size=65536k)/dev/vda1 on /etc/resolv.conf type ext3 (rw,noatime,data=ordered)/dev/vda1 on /etc/hostname type ext3 (rw,noatime,data=ordered)/dev/vda1 on /etc/hosts type ext3 (rw,noatime,data=ordered)devpts on /dev/console type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=666)proc on /proc/bus type proc (ro,relatime)proc on /proc/fs type proc (ro,relatime)proc on /proc/irq type proc (ro,relatime)proc on /proc/sys type proc (ro,relatime)proc on /proc/sysrq-trigger type proc (ro,relatime)tmpfs on /proc/acpi type tmpfs (ro,relatime)tmpfs on /proc/kcore type tmpfs (rw,nosuid,size=65536k,mode=755)tmpfs on /proc/keys type tmpfs (rw,nosuid,size=65536k,mode=755)tmpfs on /proc/timer_list type tmpfs (rw,nosuid,size=65536k,mode=755)tmpfs on /proc/sched_debug type tmpfs (rw,nosuid,size=65536k,mode=755)tmpfs on /sys/firmware type tmpfs (ro,relatime)
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。
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