@@ -28,8 +28,7 @@ FROM	ubuntu:14.04

 MAINTAINER	Tianon Gravi <admwiggin@gmail.com> (@tianon)

 # Packaged dependencies

-RUN	apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -yq \

-	apt-utils \

+RUN	apt-get update && apt-get install -y \

 	aufs-tools \

 	automake \

 	btrfs-tools \

@@ -131,8 +131,7 @@ Here's a typical Docker build process:

 ```bash

 FROM ubuntu:12.04

-RUN apt-get update

-RUN apt-get install -q -y python python-pip curl

+RUN apt-get update && apt-get install -y python python-pip curl

 RUN curl -sSL https://github.com/shykes/helloflask/archive/master.tar.gz | tar -xzv

 RUN cd helloflask-master && pip install -r requirements.txt

 ```

@@ -29,7 +29,7 @@ FROM debian:wheezy

 MAINTAINER Daniel Mizyrycki <daniel@docker.com>

 # Install Iceweasel and "sudo"

-RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -yq iceweasel sudo

+RUN apt-get update && apt-get install -y iceweasel sudo

 # create sysadmin account

 RUN useradd -m -d /data -p saIVpsc0EVTwA sysadmin

@@ -4,7 +4,7 @@

 FROM 		debian:jessie

 MAINTAINER	Sven Dowideit <SvenDowideit@docker.com> (@SvenDowideit)

-RUN 	apt-get update && apt-get install -yq make python-pip python-setuptools vim-tiny git gettext

+RUN 	apt-get update && apt-get install -y make python-pip python-setuptools vim-tiny git gettext

 RUN	pip install mkdocs

@@ -65,13 +65,12 @@ The first two steps can be done as part of a Dockerfile, as follows.

     FROM ubuntu

     MAINTAINER Eystein Måløy Stenberg <eytein.stenberg@gmail.com>

-    RUN apt-get -y install wget lsb-release unzip ca-certificates

+    RUN apt-get update && apt-get install -y wget lsb-release unzip ca-certificates

     # install latest CFEngine

     RUN wget -qO- http://cfengine.com/pub/gpg.key | apt-key add -

     RUN echo "deb http://cfengine.com/pub/apt $(lsb_release -cs) main" > /etc/apt/sources.list.d/cfengine-community.list

-    RUN apt-get update

-    RUN apt-get install cfengine-community

+    RUN apt-get update && apt-get install -y cfengine-community

     # install cfe-docker process management policy

     RUN wget https://github.com/estenberg/cfe-docker/archive/master.zip -P /tmp/ && unzip /tmp/master.zip -d /tmp/

@@ -80,7 +79,7 @@ The first two steps can be done as part of a Dockerfile, as follows.

     RUN rm -rf /tmp/cfe-docker-master /tmp/master.zip

     # apache2 and openssh are just for testing purposes, install your own apps here

-    RUN apt-get -y install openssh-server apache2

+    RUN apt-get update && apt-get install -y openssh-server apache2

     RUN mkdir -p /var/run/sshd

     RUN echo "root:password" | chpasswd  # need a password for ssh

@@ -28,19 +28,14 @@ new image.

     FROM ubuntu:13.04

     MAINTAINER examples@docker.com

-    RUN echo "deb http://archive.ubuntu.com/ubuntu precise main universe" > /etc/apt/sources.list

-    RUN apt-get update

-    RUN apt-get upgrade -y

 ## Installing Supervisor

 We can now install our SSH and Apache daemons as well as Supervisor in

 our container.

-    RUN apt-get install -y openssh-server apache2 supervisor

-    RUN mkdir -p /var/lock/apache2 /var/run/apache2

-    RUN mkdir -p /var/run/sshd

-    RUN mkdir -p /var/log/supervisor

+    RUN apt-get update && apt-get install -y openssh-server apache2 supervisor

+    RUN mkdir -p /var/lock/apache2 /var/run/apache2 /var/run/sshd /var/log/supervisor

 Here we're installing the `openssh-server`,

 `apache2` and `supervisor`

@@ -9,7 +9,7 @@ FROM		ubuntu

 MAINTAINER	SvenDowideit@docker.com

 VOLUME		["/var/cache/apt-cacher-ng"]

-RUN		apt-get update ; apt-get install -yq apt-cacher-ng

+RUN		apt-get update && apt-get install -y apt-cacher-ng

 EXPOSE		3142

-CMD		chmod 777 /var/cache/apt-cacher-ng ; /etc/init.d/apt-cacher-ng start ; tail -f /var/log/apt-cacher-ng/*

+CMD		chmod 777 /var/cache/apt-cacher-ng && /etc/init.d/apt-cacher-ng start && tail -f /var/log/apt-cacher-ng/*

@@ -28,10 +28,10 @@ Use the following Dockerfile:

     MAINTAINER  SvenDowideit@docker.com

     VOLUME      ["/var/cache/apt-cacher-ng"]

-    RUN     apt-get update ; apt-get install -yq apt-cacher-ng

+    RUN     apt-get update && apt-get install -y apt-cacher-ng

     EXPOSE      3142

-    CMD     chmod 777 /var/cache/apt-cacher-ng ; /etc/init.d/apt-cacher-ng start ; tail -f /var/log/apt-cacher-ng/*

+    CMD     chmod 777 /var/cache/apt-cacher-ng && /etc/init.d/apt-cacher-ng start && tail -f /var/log/apt-cacher-ng/*

 To build the image using:

@@ -61,7 +61,7 @@ a local version of a common base:

     FROM ubuntu

     RUN  echo 'Acquire::http { Proxy "http://dockerhost:3142"; };' >> /etc/apt/apt.conf.d/01proxy

-    RUN apt-get update ; apt-get install vim git

+    RUN apt-get update && apt-get install -y vim git

     # docker build -t my_ubuntu .

@@ -65,13 +65,12 @@ a MongoDB repository file for the package manager.

 After this initial preparation we can update our packages and install MongoDB.

     # Update apt-get sources AND install MongoDB

-    RUN apt-get update

-    RUN apt-get install -y -q mongodb-org

+    RUN apt-get update && apt-get install -y mongodb-org

 > **Tip:** You can install a specific version of MongoDB by using a list

 > of required packages with versions, e.g.:

 > 

->     RUN apt-get install -y -q mongodb-org=2.6.1 mongodb-org-server=2.6.1 mongodb-org-shell=2.6.1 mongodb-org-mongos=2.6.1 mongodb-org-tools=2.6.1

+>     RUN apt-get update && apt-get install -y mongodb-org=2.6.1 mongodb-org-server=2.6.1 mongodb-org-shell=2.6.1 mongodb-org-mongos=2.6.1 mongodb-org-tools=2.6.1

 MongoDB requires a data directory. Let's create it as the final step of our

 installation instructions.

@@ -11,8 +11,7 @@ RUN apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB10

 RUN echo 'deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen' | tee /etc/apt/sources.list.d/10gen.list

 # Update apt-get sources AND install MongoDB

-RUN apt-get update

-RUN apt-get install -y -q mongodb-org

+RUN apt-get update && apt-get install -y mongodb-org

 # Create the MongoDB data directory

 RUN mkdir -p /data/db

@@ -20,5 +19,5 @@ RUN mkdir -p /data/db

 # Expose port #27017 from the container to the host

 EXPOSE 27017

-# Set usr/bin/mongod as the dockerized entry-point application

-ENTRYPOINT usr/bin/mongod

+# Set /usr/bin/mongod as the dockerized entry-point application

+ENTRYPOINT ["/usr/bin/mongod"]

@@ -13,17 +13,13 @@ RUN apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys B97B0AFCAA

 #     of PostgreSQL, ``9.3``.

 RUN echo "deb http://apt.postgresql.org/pub/repos/apt/ precise-pgdg main" > /etc/apt/sources.list.d/pgdg.list

-# Update the Ubuntu and PostgreSQL repository indexes

-RUN apt-get update

-

 # Install ``python-software-properties``, ``software-properties-common`` and PostgreSQL 9.3

 #  There are some warnings (in red) that show up during the build. You can hide

 #  them by prefixing each apt-get statement with DEBIAN_FRONTEND=noninteractive

-RUN apt-get -y -q install python-software-properties software-properties-common

-RUN apt-get -y -q install postgresql-9.3 postgresql-client-9.3 postgresql-contrib-9.3

+RUN apt-get update && apt-get install -y python-software-properties software-properties-common postgresql-9.3 postgresql-client-9.3 postgresql-contrib-9.3

 # Note: The official Debian and Ubuntu images automatically ``apt-get clean``

-# after each ``apt-get`` 

+# after each ``apt-get``

 # Run the rest of the commands as the ``postgres`` user created by the ``postgres-9.3`` package when it was ``apt-get installed``

 USER postgres

@@ -35,17 +35,13 @@ Start by creating a new `Dockerfile`:

     #     of PostgreSQL, ``9.3``.

     RUN echo "deb http://apt.postgresql.org/pub/repos/apt/ precise-pgdg main" > /etc/apt/sources.list.d/pgdg.list

-    # Update the Ubuntu and PostgreSQL repository indexes

-    RUN apt-get update

-

     # Install ``python-software-properties``, ``software-properties-common`` and PostgreSQL 9.3

     #  There are some warnings (in red) that show up during the build. You can hide

     #  them by prefixing each apt-get statement with DEBIAN_FRONTEND=noninteractive

-    RUN apt-get -y -q install python-software-properties software-properties-common

-    RUN apt-get -y -q install postgresql-9.3 postgresql-client-9.3 postgresql-contrib-9.3

+    RUN apt-get update && apt-get install -y python-software-properties software-properties-common postgresql-9.3 postgresql-client-9.3 postgresql-contrib-9.3

     # Note: The official Debian and Ubuntu images automatically ``apt-get clean``

-    # after each ``apt-get`` 

+    # after each ``apt-get``

     # Run the rest of the commands as the ``postgres`` user created by the ``postgres-9.3`` package when it was ``apt-get installed``

     USER postgres

@@ -13,8 +13,7 @@ Firstly, we create a `Dockerfile` for our new Redis

 image.

     FROM        ubuntu:12.10

-    RUN         apt-get update

-    RUN         apt-get -y install redis-server

+    RUN         apt-get update && apt-get install -y redis-server

     EXPOSE      6379

     ENTRYPOINT  ["/usr/bin/redis-server"]

@@ -49,9 +48,9 @@ container to only this container.

 Once inside our freshly created container we need to install Redis to

 get the `redis-cli` binary to test our connection.

-    $ apt-get update

-    $ apt-get -y install redis-server

-    $ service redis-server stop

+    $ sudo apt-get update

+    $ sudo apt-get install redis-server

+    $ sudo service redis-server stop

 As we've used the `--link redis:db` option, Docker

 has created some environment variables in our web application container.

@@ -25,13 +25,6 @@ of. We'll use [Ubuntu](https://registry.hub.docker.com/_/ubuntu/) (tag:

     FROM ubuntu:latest

     MAINTAINER Hector Castro hector@basho.com

-Next, we update the APT cache and apply any updates:

-

-    # Update the APT cache

-    RUN sed -i.bak 's/main$/main universe/' /etc/apt/sources.list

-    RUN apt-get update

-    RUN apt-get upgrade -y

-

 After that, we install and setup a few dependencies:

  - `curl` is used to download Basho's APT

@@ -46,7 +39,7 @@ After that, we install and setup a few dependencies:

 <!-- -->

     # Install and setup project dependencies

-    RUN apt-get install -y curl lsb-release supervisor openssh-server

+    RUN apt-get update && apt-get install -y curl lsb-release supervisor openssh-server

     RUN mkdir -p /var/run/sshd

     RUN mkdir -p /var/log/supervisor

@@ -61,23 +54,14 @@ Next, we add Basho's APT repository:

     RUN curl -sSL http://apt.basho.com/gpg/basho.apt.key | apt-key add --

     RUN echo "deb http://apt.basho.com $(lsb_release -cs) main" > /etc/apt/sources.list.d/basho.list

-    RUN apt-get update

 After that, we install Riak and alter a few defaults:

     # Install Riak and prepare it to run

-    RUN apt-get install -y riak

+    RUN apt-get update && apt-get install -y riak

     RUN sed -i.bak 's/127.0.0.1/0.0.0.0/' /etc/riak/app.config

     RUN echo "ulimit -n 4096" >> /etc/default/riak

-Almost there. Next, we add a hack to get us by the lack of

-`initctl`:

-

-    # Hack for initctl

-    # See: https://github.com/docker/docker/issues/1024

-    RUN dpkg-divert --local --rename --add /sbin/initctl

-    RUN ln -s /bin/true /sbin/initctl

-

 Then, we expose the Riak Protocol Buffers and HTTP interfaces, along

 with SSH:

@@ -5,10 +5,7 @@

 FROM    ubuntu:12.04

 MAINTAINER Thatcher R. Peskens "thatcher@dotcloud.com"

-# make sure the package repository is up to date

-RUN apt-get update

-

-RUN apt-get install -y openssh-server

+RUN apt-get update && apt-get install -y openssh-server

 RUN mkdir /var/run/sshd

 RUN echo 'root:screencast' |chpasswd

@@ -15,10 +15,7 @@ quick access to a test container.

     FROM     ubuntu:12.04

     MAINTAINER Thatcher R. Peskens "thatcher@dotcloud.com"

-    # make sure the package repository is up to date

-    RUN apt-get update

-

-    RUN apt-get install -y openssh-server

+    RUN apt-get update && apt-get install -y openssh-server

     RUN mkdir /var/run/sshd

     RUN echo 'root:screencast' |chpasswd

@@ -516,23 +516,16 @@ For example you might add something like this:

     FROM      ubuntu

     MAINTAINER Victor Vieux <victor@docker.com>

-    # make sure the package repository is up to date

-    RUN echo "deb http://archive.ubuntu.com/ubuntu precise main universe" > /etc/apt/sources.list

-    RUN apt-get update

-

-    RUN apt-get install -y inotify-tools nginx apache2 openssh-server

+    RUN apt-get update && apt-get install -y inotify-tools nginx apache2 openssh-server

     # Firefox over VNC

     #

     # VERSION               0.3

     FROM ubuntu

-    # make sure the package repository is up to date

-    RUN echo "deb http://archive.ubuntu.com/ubuntu precise main universe" > /etc/apt/sources.list

-    RUN apt-get update

     # Install vnc, xvfb in order to create a 'fake' display and firefox

-    RUN apt-get install -y x11vnc xvfb firefox

+    RUN apt-get update && apt-get install -y x11vnc xvfb firefox

     RUN mkdir /.vnc

     # Setup a password

     RUN x11vnc -storepasswd 1234 ~/.vnc/passwd

@@ -245,8 +245,7 @@ example now for building our own Sinatra image for our development team.

     # This is a comment

     FROM ubuntu:14.04

     MAINTAINER Kate Smith <ksmith@example.com>

-    RUN apt-get -qq update

-    RUN apt-get -qqy install ruby ruby-dev

+    RUN apt-get update && apt-get install -y ruby ruby-dev

     RUN gem install sinatra

 Let's look at what our `Dockerfile` does. Each instruction prefixes a statement and is capitalized.

@@ -272,38 +271,168 @@ Sinatra gem.

 Now let's take our `Dockerfile` and use the `docker build` command to build an image.

     $ sudo docker build -t="ouruser/sinatra:v2" .

-    Uploading context  2.56 kB

-    Uploading context

+    Sending build context to Docker daemon 2.048 kB

+    Sending build context to Docker daemon 

     Step 0 : FROM ubuntu:14.04

-     ---> 99ec81b80c55

+     ---> e54ca5efa2e9

     Step 1 : MAINTAINER Kate Smith <ksmith@example.com>

-     ---> Running in 7c5664a8a0c1

-     ---> 2fa8ca4e2a13

-    Removing intermediate container 7c5664a8a0c1

-    Step 2 : RUN apt-get -qq update

-     ---> Running in b07cc3fb4256

-     ---> 50d21070ec0c

-    Removing intermediate container b07cc3fb4256

-    Step 3 : RUN apt-get -qqy install ruby ruby-dev

-     ---> Running in a5b038dd127e

+     ---> Using cache

+     ---> 851baf55332b

+    Step 2 : RUN apt-get update && apt-get install -y ruby ruby-dev

+     ---> Running in 3a2558904e9b

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     (Reading database ... 11518 files and directories currently installed.)

     Preparing to unpack .../libasan0_4.8.2-19ubuntu1_amd64.deb ...

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+    Setting up ca-certificates (20130906ubuntu2) ...

+    debconf: unable to initialize frontend: Dialog

+    debconf: (TERM is not set, so the dialog frontend is not usable.)

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+    Setting up ruby1.9.1-dev (1.9.3.484-2ubuntu1) ...

+    Setting up ruby-dev (1:1.9.3.4) ...

     Setting up ruby (1:1.9.3.4) ...

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     Processing triggers for libc-bin (2.19-0ubuntu6) ...

-     ---> 2acb20f17878

-    Removing intermediate container a5b038dd127e

-    Step 4 : RUN gem install sinatra

-     ---> Running in 5e9d0065c1f7

-    . . .

+    Processing triggers for ca-certificates (20130906ubuntu2) ...

+    Updating certificates in /etc/ssl/certs... 164 added, 0 removed; done.

+    Running hooks in /etc/ca-certificates/update.d....done.

+     ---> c55c31703134

+    Removing intermediate container 3a2558904e9b

+    Step 3 : RUN gem install sinatra

+     ---> Running in 6b81cb6313e5

+    unable to convert "\xC3" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to US-ASCII for README.rdoc, skipping

+    unable to convert "\xC3" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to US-ASCII for README.rdoc, skipping

+    Successfully installed rack-1.5.2

+    Successfully installed tilt-1.4.1

     Successfully installed rack-protection-1.5.3

     Successfully installed sinatra-1.4.5

     4 gems installed

-     ---> 324104cde6ad

-    Removing intermediate container 5e9d0065c1f7

-    Successfully built 324104cde6ad

+    Installing ri documentation for rack-1.5.2...

+    Installing ri documentation for tilt-1.4.1...

+    Installing ri documentation for rack-protection-1.5.3...

+    Installing ri documentation for sinatra-1.4.5...

+    Installing RDoc documentation for rack-1.5.2...

+    Installing RDoc documentation for tilt-1.4.1...

+    Installing RDoc documentation for rack-protection-1.5.3...

+    Installing RDoc documentation for sinatra-1.4.5...

+     ---> 97feabe5d2ed

+    Removing intermediate container 6b81cb6313e5

+    Successfully built 97feabe5d2ed

 We've specified our `docker build` command and used the `-t` flag to identify

 our new image as belonging to the user `ouruser`, the repository name `sinatra`

@@ -290,7 +290,8 @@ echo deb $(s3_url)/ubuntu docker main > /etc/apt/sources.list.d/docker.list

 apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 36A1D7869245C8950F966E92D8576A8BA88D21E9

 # Install docker

-apt-get update ; apt-get install -y lxc-docker

+apt-get update

+apt-get install -y lxc-docker

 #

 # Alternatively, just use the curl-able install.sh script provided at $(s3_url)