Fedora 30
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Docker : install
2019/05/10
 
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 official 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 -it fedora /bin/bash

[root@0e7be7503d41 /]#    
# Container's console
[root@0e7be7503d41 /]#
uname -a

Linux 0e7be7503d41 5.0.10-300.fc30.x86_64 #1 SMP Tue Apr 30 16:22:12 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
[root@0e7be7503d41 /]#
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 -it fedora /bin/bash

[root@c303d34d84f9 /]# [root@dlp ~]#    
# Ctrl+p, Ctrl+q
# show docker process

[root@dlp ~]#
docker ps

CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
c303d34d84f9        fedora              "/bin/bash"         22 seconds ago      Up 20 seconds                           modest_liskov

# connect to container's session

[root@dlp ~]#
docker exec -it c303d34d84f9 /bin/bash

[root@c303d34d84f9 /]#    
# just connected
# shutdown container's process from Host's console

[root@dlp ~]#
docker kill c303d34d84f9

[root@dlp ~]#
docker ps

CONTAINER ID    IMAGE          COMMAND       CREATED          STATUS          PORTS     NAMES
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