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一、帮助启动类命令

1、启动docker
[root@localhost ~]# systemctl start docker
2、停止docker
[root@localhost ~]# systemctl stop docker
3、重启docker
[root@localhost ~]# systemctl stop docker
4、查看docker状态
[root@localhost ~]# systemctl status docker
5、开机自启动
[root@localhost ~]# systemctl enable docker
6、查看docker 概要信息
[root@localhost ~]# docker info
7、查看docker总体帮助文档
[root@localhost ~]# docker --help
8、查看docker命令帮助文档
docker 具体命令 --help
[root@localhost ~]# docker image --help

二、镜像命令

查看帮助文档：
Commands:attach    Attach to a running container                 # 当前 shell 下 attach 连接指定运行镜像build     Build an image from a Dockerfile              # 通过 Dockerfile 定制镜像commit    Create a new image from a container's changes # 提交当前容器为新的镜像cp        Copy files/folders from the containers filesystem to the host path # 从容器中拷贝指定文件或者目录到宿主机中create    Create a new container                        # 创建一个新的容器，同 run，但不启动容器diff      Inspect changes on a container's filesystem   # 查看 docker 容器变化events    Get real time events from the server          # 从 docker 服务获取容器实时事件exec      Run a command in an existing container        # 在已存在的容器上运行命令export    Stream the contents of a container as a tar archive # 导出容器的内容流作为一个 tar 归档文件[对应 import ]history   Show the history of an image                  # 展示一个镜像形成历史images    List images                                   # 列出系统当前镜像import    Create a new filesystem image from the contents of a tarball # 从tar包中的内容创建一个新的文件系统映像[对应 export]info      Display system-wide information               # 显示系统相关信息inspect   Return low-level information on a container   # 查看容器详细信息kill      Kill a running container                      # kill 指定 docker 容器load      Load an image from a tar archive              # 从一个 tar 包中加载一个镜像[对应 save]login     Register or Login to the docker registry server # 注册或者登陆一个 docker 源服务器logout    Log out from a Docker registry server         # 从当前 Docker registry 退出logs      Fetch the logs of a container                 # 输出当前容器日志信息port      Lookup the public-facing port which is NAT-ed to PRIVATE_PORT # 查看映射端口对应的容器内部源端口pause     Pause all processes within a container        # 暂停容器ps        List containers                               # 列出容器列表pull      Pull an image or a repository from the docker registry server # 从docker镜像源服务器拉取指定镜像或者库镜像push      Push an image or a repository to the docker registry server # 推送指定镜像或者库镜像至docker源服务器restart   Restart a running container                   # 重启运行的容器rm        Remove one or more containers                 # 移除一个或者多个容器rmi       Remove one or more images# 移除一个或多个镜像[无容器使用该镜像才可删除，否则需删除相关容器才可继续或 -f 强制删除]run       Run a command in a new container  # 创建一个新的容器并运行一个命令save      Save an image to a tar archive                # 保存一个镜像为一个 tar 包[对应 load]search    Search for an image on the Docker Hub         # 在 docker hub 中搜索镜像start     Start a stopped containers                    # 启动容器stop      Stop a running containers                     # 停止容器tag       Tag an image into a repository                # 给源中镜像打标签top       Lookup the running processes of a container   # 查看容器中运行的进程信息unpause   Unpause a paused container                    # 取消暂停容器version   Show the docker version information           # 查看 docker 版本号wait      Block until a container stops, then print its exit code# 截取容器停止时的退出状态值
Run 'docker COMMAND --help' for more information on a command.示例：
1、列出本地的镜像
语法：docker images [OPTIONS] [REPOSITORY[:TAG]]
[root@localhost ~]# docker images
REPOSITORY    TAG       IMAGE ID       CREATED         SIZE各个选项说明：REPOSITORY：表示镜像的仓库源TAG:镜像的标签版本号IMAGE ID 
:镜像IDCREATED:镜像创建时间SIZE:镜像大小OPTIONS 选项说明：-a:列出本地所有镜像（含历史镜像层）-q:只显示镜像ID
示例：
[root@localhost lib]# docker images -q
d2c94e258dcb
[root@localhost lib]# 
[root@localhost lib]# 
[root@localhost lib]# docker images -a
REPOSITORY    TAG       IMAGE ID       CREATED         SIZE
hello-world   latest    d2c94e258dcb   13 months ago   13.3kB2、查询镜像
语法：docker search [OPTIONS] 镜像名字
[root@localhost ~]# docker search redis
NAME                                    DESCRIPTION                                   STARS     OFFICIAL
redis                                   Redis is the world’s fastest data platform f…   12853     [OK]
redislabs/redisearch                    Redis With the RedisSearch module pre-loaded…   64        
redislabs/redisinsight                  RedisInsight - The GUI for Redis                103       
redis/redis-stack-server                redis-stack-server installs a Redis server w…   76        
有点多不粘贴了只列出前5个
[root@localhost ~]# docker search --limit 5 redis
NAME                       DESCRIPTION                                     STARS     OFFICIAL
redis                      Redis is the world’s fastest data platform f…   12853     [OK]
redislabs/redisearch       Redis With the RedisSearch module pre-loaded…   64        
redislabs/redisinsight     RedisInsight - The GUI for Redis                103       
redis/redis-stack-server   redis-stack-server installs a Redis server w…   76        
redis/redis-stack          redis-stack installs a Redis server with add…   1073、拉取镜像
语法：docker pull [OPTIONS] NAME[:TAG|@DIGEST]
[root@localhost ~]# docker pull ubuntu    # 下载官方 ubuntu docker镜像，默认下载最新 ubuntu 官方库镜像
[root@localhost ~]# docker pull ubuntu:14.04  # 下载指定版本 ubuntu 官方镜像4、查看镜像、容器、数据卷所占的空间
[root@localhost ~]# docker system df
TYPE（类型）  TOTAL（数量）ACTIVE （运行的）   SIZE （大小）     RECLAIMABLE（可用的）
Images          1            1              13.26kB            0B (0%)
Containers      1            0              0B                 0B
Local Volumes   0            0              0B                 0B
Build Cache     0            0              0B                 0B5、删除一个或者多个镜像
语法：docker rmi [OPTIONS] IMAGE [IMAGE...][root@localhost ~]# docker images
REPOSITORY    TAG       IMAGE ID       CREATED         SIZE
hello-world   latest    d2c94e258dcb   13 months ago   13.3kB
[root@localhost ~]# 6、删除镜像
[root@localhost ~]# docker rmi d2c94e258dcb
Error response from daemon: conflict: unable to delete d2c94e258dcb (must be forced) - image is being used by stopped container 0ac0ad1afbfc
[root@localhost ~]# #删除多个镜像
docker rmi -f 镜像名1：版本号 镜像名2：版本号
docker rmi -f 镜像ID1 镜像ID2
#删除全部
docker rmi -f $(docker images -qa)7、attach
# 当前 shell 下 attach 连接指定运行镜像
[root@localhost ~]# docker attach f6d23f416b00
root@f6d23f416b00:/#

三、容器命令

有镜像才能创建容器，本次演示使用Ubuntu镜像，先拉取镜像

[root@localhost network-scripts]# docker pull ubuntu[root@localhost ~]# docker images
REPOSITORY    TAG       IMAGE ID       CREATED       SIZE
ubuntu        latest    ba6acccedd29   2 years ago   72.8MB
hello-world   latest    feb5d9fea6a5   2 years ago   13.3kB

1、新建或启动一个容器

查看帮助文档
[root@localhost ~]# docker run --help语法：docker run [OPTIONS] IMAGE [COMMAND] [ARG...]
常用选项：注意 有些是一个减号，有些是两个减号
-c：设置 cpu 使用权重
-d：后台运行容器，并返回容器ID
-h：# 设置容器主机名
-i:以交互模式运行容器，通常与 -t 同时使用
-t：为容器重新分配一个伪输入终端
-m： 内存限制
--name="容器新名字"  ：为容器指定一个名称-P：# 自动映射容器对外提供服务的端口-p：# 指定端口映射示例：# 创建一个 cpu 优先级为 100，内存限制 512MB，主机名为 test1，名为 docker_test1 后台运行 bash 的容器[root@localhost ~]# docker run -t -i -c 100 -m 512MB -h test1 -d --name="docker_test1" ubuntu /bin/bash
1551e23a57a11d72f1089ee61672a8063c82529ab2b07ac2009cd4e96c3fe3a4
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# docker ps
CONTAINER ID   IMAGE     COMMAND       CREATED          STATUS          PORTS     NAMES
1551e23a57a1   ubuntu    "/bin/bash"   28 seconds ago   Up 28 seconds             docker_test1
[root@localhost ~]# 
[root@localhost ~]# docker attach docker_test1
root@test1:/# 
root@test1:/# 
root@test1:/# exit
exit
[root@localhost ~]# 

2、查看当前运行的容器

语法： docker ps [OPTIONS]
选项：-a # 列出当前系统正在运行的容器，+历史运行过的-l # 显示最近创建的容器-n # 显示最近n个创建的容器-q # 静默模式，只显示容器编号示例：
[root@localhost ~]# docker ps
CONTAINER ID   IMAGE     COMMAND       CREATED              STATUS              PORTS     NAMES
1ed59b9bdb95   ubuntu    "/bin/bash"   About a minute ago   Up About a minute             docker_test2[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE     COMMAND       CREATED         STATUS                     PORTS     NAMES
1ed59b9bdb95   ubuntu    "/bin/bash"   2 minutes ago   Up 2 minutes                         docker_test2
5cd794497a4d   ubuntu    "/bin/bash"   3 minutes ago   Exited (0) 3 minutes ago             docker_test1[root@localhost ~]# docker ps -l
CONTAINER ID   IMAGE     COMMAND       CREATED         STATUS         PORTS     NAMES
1ed59b9bdb95   ubuntu    "/bin/bash"   9 minutes ago   Up 9 minutes             docker_test2
[root@localhost ~]# 
[root@localhost ~]# docker ps -n 1
CONTAINER ID   IMAGE     COMMAND       CREATED          STATUS          PORTS     NAMES
1ed59b9bdb95   ubuntu    "/bin/bash"   10 minutes ago   Up 10 minutes             docker_test2
[root@localhost ~]# docker ps -n 2
CONTAINER ID   IMAGE     COMMAND       CREATED          STATUS                      PORTS     NAMES
1ed59b9bdb95   ubuntu    "/bin/bash"   10 minutes ago   Up 10 minutes                         docker_test2
5cd794497a4d   ubuntu    "/bin/bash"   11 minutes ago   Exited (0) 11 minutes ago             docker_test1
[root@localhost ~]# 
[root@localhost ~]# docker ps -q
1ed59b9bdb95

3、退出容器

退出容器方式有两种，
（1）、exit: run 进去容器，exit退出，容器停止
（2）、ctrl+p+q：run进去容器，Ctrl+p+q退出，容器不停止示例1：[root@localhost ~]# docker ps 
CONTAINER ID   IMAGE     COMMAND       CREATED         STATUS         PORTS     NAMES
f6d23f416b00   ubuntu    "/bin/bash"   5 seconds ago   Up 4 seconds             kind_pike
1ed59b9bdb95   ubuntu    "/bin/bash"   3 hours ago     Up 3 hours               docker_test2
[root@localhost ~]# 
[root@localhost ~]# docker attach f6d23f416b00root@f6d23f416b00:/# 
root@f6d23f416b00:/# ls
bin  boot  dev  etc  home  lib  lib32  lib64  libx32  media  mnt  opt  proc  root  run  sbin  srv  sys  tmp  usr  var
root@f6d23f416b00:/# 
root@f6d23f416b00:/# exit
exit
[root@localhost ~]# 
[root@localhost ~]# docker ps 
CONTAINER ID   IMAGE     COMMAND       CREATED       STATUS       PORTS     NAMES
1ed59b9bdb95   ubuntu    "/bin/bash"   3 hours ago   Up 3 hours             docker_test2
可以看到刚才进去的容器已经消失了。
示例2：
进入第二个容器，然后Ctrl+p+q退出，然后容器还在运行中
[root@localhost ~]# docker attach 1ed59b9bdb95
root@test2:/# 
root@test2:/# 
root@test2:/# read escape sequence
[root@localhost ~]# docker ps 
CONTAINER ID   IMAGE     COMMAND       CREATED       STATUS       PORTS     NAMES
1ed59b9bdb95   ubuntu    "/bin/bash"   3 hours ago   Up 3 hours             docker_test2

4、启动已经停止运行的容器

docker start 容器ID或者容器名
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE     COMMAND       CREATED         STATUS                     PORTS     NAMES
f6d23f416b00   ubuntu    "/bin/bash"   7 minutes ago   Exited (0) 4 minutes ago             kind_pike
1ed59b9bdb95   ubuntu    "/bin/bash"   3 hours ago     Up 3 hours                           docker_test2[root@localhost ~]# 
[root@localhost ~]# docker start f6d23f416b00
f6d23f416b00
[root@localhost ~]# 
[root@localhost ~]# docker ps 
CONTAINER ID   IMAGE     COMMAND       CREATED         STATUS         PORTS     NAMES
f6d23f416b00   ubuntu    "/bin/bash"   8 minutes ago   Up 4 seconds             kind_pike
1ed59b9bdb95   ubuntu    "/bin/bash"   3 hours ago     Up 3 hours               docker_test2

5、重启、停止、强制停止容器

重启容器
docker restart 容器ID或者容器名
停止容器
docker stop 容器ID或者容器名
强制停止容器
docker kill 容器ID或者容器名
示例：
[root@localhost ~]# docker restart f6d23f416b00
f6d23f416b00
[root@localhost ~]# 
[root@localhost ~]# docker stop f6d23f416b00
f6d23f416b00
[root@localhost ~]# docker ps 
CONTAINER ID   IMAGE     COMMAND       CREATED       STATUS       PORTS     NAMES
1ed59b9bdb95   ubuntu    "/bin/bash"   3 hours ago   Up 3 hours             docker_test2
[root@localhost ~]# 
[root@localhost ~]# docker start f6d23f416b00
f6d23f416b00
[root@localhost ~]# 
[root@localhost ~]# docker ps 
CONTAINER ID   IMAGE     COMMAND       CREATED          STATUS         PORTS     NAMES
f6d23f416b00   ubuntu    "/bin/bash"   11 minutes ago   Up 2 seconds             kind_pike
1ed59b9bdb95   ubuntu    "/bin/bash"   3 hours ago      Up 3 hours               docker_test2
[root@localhost ~]# 
[root@localhost ~]# docker kill f6d23f416b00
f6d23f416b00
[root@localhost ~]# docker ps 
CONTAINER ID   IMAGE     COMMAND       CREATED       STATUS       PORTS     NAMES
1ed59b9bdb95   ubuntu    "/bin/bash"   3 hours ago   Up 3 hours             docker_test2

6、删除容器 docker rm 容器ID或者名字，如果正在运行是不能删除的，必须先停止容器。

[root@localhost ~]# docker rm 0ac0ad1afbfc
0ac0ad1afbfc
[root@localhost ~]# 
如果非要删除，可不是不可以 ,加上-f 选项 强制删除
[root@localhost ~]# docker rm -f 0ac0ad1afbfc
0ac0ad1afbfc
[root@localhost ~]# 

四、重点

1、启动守护式容器（后台启动），也就是使用 -d 选项

命令：docker run -d ubuntu
[root@localhost ~]# docker run -d redis
b7c4927819e6c41373a056ead4efb448e2225ca61492ec9ad5ded72ad80dad3f
[root@localhost ~]# 
[root@localhost ~]# docker ps
CONTAINER ID   IMAGE     COMMAND                  CREATED         STATUS         PORTS      NAMES
b7c4927819e6   redis     "docker-entrypoint.s…"   2 seconds ago   Up 2 seconds   6379/tcp   interesting_snyder

2、查看日志

命令：docker logs 容器ID
选项：--details        显示更多的信息-f, --follow         跟踪实时日志--since string   显示自某个timestamp之后的日志，或相对时间，如42m（即42分钟）--tail string    从日志末尾显示多少行日志， 默认是all-t, --timestamps     显示时间戳--until string   显示自某个timestamp之前的日志，或相对时间，如42m（即42分钟）示例：
[root@localhost ~]# docker logs b7c4927819e6
查看实时日志
[root@localhost ~]# docker logs -f b7c4927819e6
查看指定行数的日志
[root@localhost ~]# docker logs -f --tail=200 b7c4927819e6日志过滤：
1、关键字过滤
docker logs <容器id> | grep “关键词”
2、时间范围的过滤：使用–since和–until参数，可以查看指定时间段内的日志
docker logs --since "2024-06-17T00:00:00" --until "2024-06-17T23:59:59" <容器id>
3、日志输出
docker logs <容器id> > container_logs.txt

3、查看容器内运行的进程

[root@localhost ~]# docker ps
CONTAINER ID   IMAGE     COMMAND                  CREATED          STATUS          PORTS      NAMES
b7c4927819e6   redis     "docker-entrypoint.s…"   41 minutes ago   Up 41 minutes   6379/tcp   interesting_snyder
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# docker top b7c4927819e6
UID                 PID                 PPID                C                   STIME               TTY                 TIME                CMD
polkitd             21682               21661               0                   14:48               ?                   00:00:05            redis-server *:6379

4、查看容器或者镜像的详细信息

docker  inspect 容器ID
[root@localhost ~]# docker inspect b7c4927819e6

5、进入正在运行的容器并以命令行交互

1、docker exec -it 容器ID /    bin/bash
2、docker attach -it 容器ID /bin/bash
以上两个都可以。但是他们有什么区别呢
（1）：attach 直接进入容器启动命令的终端，不会启动新的进程，用exit退出，会导致容器停止
（2）：exec 是在容器中打开新的终端，并且可以启动新的进程，用exit退出，不会导致容器停止示例
[root@localhost ~]# docker run -it -d ubuntu /bin/bash
8bb2bfc0fb83b11eb4951d26af49221e6a8d9ae426f6ab47fee6773ca6b13952
[root@localhost ~]# 
[root@localhost ~]# docker ps
CONTAINER ID   IMAGE     COMMAND                  CREATED             STATUS             PORTS      NAMES
8bb2bfc0fb83   ubuntu    "/bin/bash"              3 seconds ago       Up 2 seconds                  exciting_grothendieck
b7c4927819e6   redis     "docker-entrypoint.s…"   About an hour ago   Up About an hour   6379/tcp   interesting_snyder
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# docker attach 8bb2bfc0fb83
root@8bb2bfc0fb83:/# 
root@8bb2bfc0fb83:/# exit
exit
[root@localhost ~]# 
[root@localhost ~]# docker ps
CONTAINER ID   IMAGE     COMMAND                  CREATED             STATUS             PORTS      NAMES
b7c4927819e6   redis     "docker-entrypoint.s…"   About an hour ago   Up About an hour   6379/tcp   interesting_snyder
[root@localhost ~]# 
[root@localhost ~]# docker run -it -d ubuntu /bin/bash
17d361f6c531847d1713a8ff403aefe96c504927888f1528f7228309f8adb3d8
[root@localhost ~]# 
[root@localhost ~]# docker ps
CONTAINER ID   IMAGE     COMMAND                  CREATED             STATUS             PORTS      NAMES
17d361f6c531   ubuntu    "/bin/bash"              3 seconds ago       Up 2 seconds                  busy_kapitsa
b7c4927819e6   redis     "docker-entrypoint.s…"   About an hour ago   Up About an hour   6379/tcp   interesting_snyder
[root@localhost ~]#
[root@localhost ~]# 
[root@localhost ~]# docker exec -it 17d361f6c531 /bin/bash
root@17d361f6c531:/# 
root@17d361f6c531:/# exit
exit
[root@localhost ~]# docker ps
CONTAINER ID   IMAGE     COMMAND                  CREATED             STATUS             PORTS      NAMES
17d361f6c531   ubuntu    "/bin/bash"              2 minutes ago       Up 2 minutes                  busy_kapitsa
b7c4927819e6   redis     "docker-entrypoint.s…"   About an hour ago   Up About an hour   6379/tcp   interesting_snyder

6、从容器内拷贝文件到主机上

进入容器
命令：docker cp 容器ID:容器内路径 目的主机路径
[root@localhost ~]# docker exec -it 17d361f6c531 /bin/bash
root@17d361f6c531:/# 
root@17d361f6c531:/# cd /tmp/
root@17d361f6c531:/tmp# 
root@17d361f6c531:/tmp# touch a.txt
root@17d361f6c531:/tmp# 
root@17d361f6c531:/tmp# ll
total 0
drwxrwxrwt. 1 root root 19 Jun 17 08:26 ./
drwxr-xr-x. 1 root root 29 Jun 17 07:50 ../
-rw-r--r--. 1 root root  0 Jun 17 08:26 a.txt
[root@localhost ~]# docker cp 17d361f6c531:/tmp/a.txt /tmp/
Successfully copied 1.54kB to /tmp/
[root@localhost ~]# 

7、导入和导出容器

export 导出容器的内容留做为一个tar归档文件【对应import命令】
import从tar包中的内容创建一个新的文件系统在导入为镜像【对应export】
示例：
[root@localhost tmp]# docker ps
CONTAINER ID   IMAGE     COMMAND                  CREATED        STATUS       PORTS      NAMES
17d361f6c531   ubuntu    "/bin/bash"              21 hours ago   Up 3 hours              busy_kapitsa
b7c4927819e6   redis     "docker-entrypoint.s…"   22 hours ago   Up 3 hours   6379/tcp   interesting_snyder
[root@localhost tmp]# 
[root@localhost tmp]# docker export 17d361f6c531 > /tmp/ubuntu.tar
[root@localhost tmp]#导入
cat 包名.tar | docker import - 镜像用户/镜像名:镜像版本号
[root@localhost tmp]# docker ps
CONTAINER ID   IMAGE     COMMAND                  CREATED        STATUS       PORTS      NAMES
17d361f6c531   ubuntu    "/bin/bash"              21 hours ago   Up 3 hours              busy_kapitsa
b7c4927819e6   redis     "docker-entrypoint.s…"   22 hours ago   Up 3 hours   6379/tcp   interesting_snyder
[root@localhost tmp]# 
[root@localhost tmp]# 
[root@localhost tmp]# docker rm -f 17d361f6c531
17d361f6c531
[root@localhost tmp]# 
[root@localhost tmp]# 
[root@localhost tmp]# docker ps
CONTAINER ID   IMAGE     COMMAND                  CREATED        STATUS       PORTS      NAMES
b7c4927819e6   redis     "docker-entrypoint.s…"   22 hours ago   Up 3 hours   6379/tcp   interesting_snyder
[root@localhost tmp]# 
[root@localhost tmp]# docker images
REPOSITORY    TAG       IMAGE ID       CREATED       SIZE
redis         latest    7614ae9453d1   2 years ago   113MB
ubuntu        latest    ba6acccedd29   2 years ago   72.8MB
hello-world   latest    feb5d9fea6a5   2 years ago   13.3kB
[root@localhost tmp]# 
[root@localhost tmp]# cat ubuntu.tar | docker import - wu/ubuntu:latest
sha256:9fd000d64b52e57a2c9111f2ffd9ea61f53a934af606327408a7c33e4c2ed0d3
[root@localhost tmp]# 
[root@localhost tmp]# docker images
REPOSITORY    TAG       IMAGE ID       CREATED                  SIZE
wu/ubuntu     latest    9fd000d64b52   Less than a second ago   72.8MB
redis         latest    7614ae9453d1   2 years ago              113MB
ubuntu        latest    ba6acccedd29   2 years ago              72.8MB
hello-world   latest    feb5d9fea6a5   2 years ago              13.3kB
[root@localhost tmp]# 
[root@localhost tmp]# docker ps
CONTAINER ID   IMAGE     COMMAND                  CREATED        STATUS       PORTS      NAMES
b7c4927819e6   redis     "docker-entrypoint.s…"   22 hours ago   Up 3 hours   6379/tcp   interesting_snyder
[root@localhost tmp]# 
[root@localhost tmp]# docker run -it -d 9fd000d64b52 /bin/bash
3fd8b4c60b6cb60f9548fb8ff204752a001bdc0705c3206ff9b969bd37ddd952
[root@localhost tmp]# 
[root@localhost tmp]# docker ps
CONTAINER ID   IMAGE          COMMAND                  CREATED                  STATUS                  PORTS      NAMES
3fd8b4c60b6c   9fd000d64b52   "/bin/bash"              Less than a second ago   Up Less than a second              relaxed_liskov
b7c4927819e6   redis          "docker-entrypoint.s…"   22 hours ago             Up 3 hours              6379/tcp   interesting_snyder[root@localhost tmp]# 
[root@localhost tmp]# docker exec -it 3fd8b4c60b6c /bin/bash
root@3fd8b4c60b6c:/# cd /tmp/
root@3fd8b4c60b6c:/tmp# ll
total 0
drwxrwxrwt. 2 root root 19 Jun 17 08:26 ./
drwxr-xr-x. 1 root root 18 Jun 18 04:34 ../
-rw-r--r--. 1 root root  0 Jun 17 08:26 a.txt
root@3fd8b4c60b6c:/tmp#