Fedora 28
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Docker : Install
2018/05/30
 
Install Docker which is the Operating System-Level Virtualization Tool, which automates the deployment of applications inside Containers.
[1] Install Docker.
[root@dlp ~]#
dnf -y install docker
[root@dlp ~]#
systemctl start docker

[root@dlp ~]#
systemctl enable docker

[2] Download an official image and create a Container and output the words [Welcome to the Docker World] inside the Container.
# download the image

[root@dlp ~]#
docker pull fedora

Using default tag: latest
Trying to pull repository docker.io/library/fedora ...
.....
.....
# run echo inside Container

[root@dlp ~]#
docker run fedora /bin/echo "Welcome to the Docker World"

Welcome to the Docker World
[3] Connect to the interactive session of a Container with [i] and [t] option like follows. If exit from the Container session, the process of a Container finishes.
[root@dlp ~]#
docker run -i -t fedora /bin/bash

[root@9fbefde05ed8 /]#    
# Container's console
[root@9fbefde05ed8 /]#
uname -a

Linux 9fbefde05ed8 4.16.6-302.fc28.x86_64 #1 SMP Wed May 2 00:07:06 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
[root@9fbefde05ed8 /]#
exit

exit
[root@dlp ~]#    
# come back
[4] If exit from the Container session with keeping container's process, push [Ctrl+p] and [Ctrl+q] key.
[root@dlp ~]#
docker run -i -t fedora /bin/bash

[root@e31197f3854a /]# [root@dlp ~]#    
# Ctrl+p, Ctrl+q
# show docker process

[root@dlp ~]#
docker ps

CONTAINER ID   IMAGE    COMMAND       CREATED          STATUS           PORTS    NAMES
e31197f3854a   fedora   "/bin/bash"   18 seconds ago   Up 17 seconds             suspicious_roentgen

# connect to container's session

[root@dlp ~]#
docker exec -it e31197f3854a /bin/bash

[root@e31197f3854a /]#    
# connected
# shutdown container's process from Host's console

[root@dlp ~]#
docker kill e31197f3854a

[root@dlp ~]#
docker ps

CONTAINER ID    IMAGE          COMMAND       CREATED          STATUS          PORTS     NAMES
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