Create one image which have base as ubuntu and with git, ntp, apache2
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root@ip-172-31-28-155:/home/ubuntu# docker run -itd ubuntu
root@ip-172-31-28-155:/home/ubuntu# docker attach 1e1fe360cf47
[root@1e1fe360cf47 /]# apt-get update
[root@1e1fe360cf47 /]# apt-get install git
[root@1e1fe360cf47 /]# apt-get install ntp
[root@1e1fe360cf47 /]# apt-get install apache2
root@ip-172-31-28-155:/home/ubuntu# docker commit -a"sujith" -m"ubuntu_git" 1e1fe360cf47 srm-ubuntu
root@ip-172-31-28-155:/home/ubuntu# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
manunar1 latest ba3b4bb2ee4f 4 seconds ago 611MB
srm-ubuntu latest 55edd4725739 42 seconds ago 259MB
ub-up-git-ap2 latest 3227855a10e9 3 minutes ago 259MB
root@ip-172-31-28-155:/home/ubuntu# docker history ubuntu
IMAGE CREATED CREATED BY SIZE COMMENT
fb52e22af1b0 4 hours ago /bin/sh -c #(nop) CMD ["bash"] 0B
<missing> 4 hours ago /bin/sh -c #(nop) ADD file:d2abf27fe2e8b0b5f… 72.8MB
root@ip-172-31-28-155:/home/ubuntu# docker history srm-ubuntu
IMAGE CREATED CREATED BY SIZE COMMENT
55edd4725739 About a minute ago bash 187MB ubuntu_git
fb52e22af1b0 4 hours ago /bin/sh -c #(nop) CMD ["bash"] 0B
<missing> 4 hours ago /bin/sh -c #(nop) ADD file:d2abf27fe2e8b0b5f… 72.8MB
root@ip-172-31-28-155:/home/ubuntu# docker run -itd srm-ubuntu
c01f05cfa01cdc7c8485c60325e6734ed79200869fdafaa8b195490c0e17e85c
root@ip-172-31-28-155:/home/ubuntu# docker attach c01f05cfa01cdc7c8485c60325e6734ed79200869fdafaa8b195490c0e17e85c