how to use docker by step

# how to use docker by step

---

简明提要：

## 1. download images.

# docker pull ununtu

docker images list.

# docker images

Docker Hello World # docker run ubuntu

# /bin/echo “Hello world, bobby”

Hello world, bobby

## 2. 互式的容器

# docker run -i -t centos /bin/bash

# docker run -it centos /bin/bash

[root@314993aa7405 /]

# ls

```
anaconda-post.log  bin  dev  etc  home  lib  lib64  lost+found  media  mnt  opt  proc  root  run  sbin  srv  sys  tmp  usr  var
```

[root@314993aa7405 /]

# uname -a

```
Linux 314993aa7405 3.10.108-1.el6.elrepo.x86_64 #1 SMP Sun Nov 5 10:54:49 EST 2017 x86_64 x86_64 x86_64 GNU/Linux
```

[root@314993aa7405 /]

# hostname

```
314993aa7405
```

[root@314993aa7405 /]

# uname -r

```
3.10.108-1.el6.elrepo.x86_64
```

[root@314993aa7405 /]

# cat /etc/redhat-release

```
CentOS Linux release 7.4.1708 (Core) 
```

## 3. 后台模式

# docker run -d centos /bin/sh -c “while true; do echo hello bobby; sleep 1; done”

查看进程的ID

# docker ps

- CONTAINER ID        IMAGE     COMMAND                CREATED              STATUS      PORTS     NAMES
- 3c2c1c75966f        centos    "/bin/sh -c 'while t   About a minute ago   Up About a minute     serene_hodgkin

查看进程在DOCKER里运行的状态，ID和 NAMES 都是唯一性

[root@tstpc ~]
    # docker logs 3c2c1c75966f

- hello bobby
- hello bobby
- hello bobby
- hello bobby

## 4. Stop docker

```bash
[root@tstpc ~]
    # docker ps
 CONTAINER ID        IMAGE     COMMAND         CREATED      STATUS        PORTS        NAMES
 3c2c1c75966f        centos    "/bin/sh -c 'while t   6 minutes ago    Up 6 minutes    serene_hodgkin      
```

```bash
ID和 NAMES 都是唯一性   
[root@tstpc ~]
    # docker stop 3c2c1c75966f
3c2c1c75966f
```

```bash
[root@tstpc ~]
    # docker ps
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES

```