From 362a68b96b85dc0c51814037dfd3fe0e637a2820 Mon Sep 17 00:00:00 2001 From: Karl Herrick Date: Mon, 25 Apr 2016 16:55:38 -0400 Subject: [PATCH] update README.md * remove trailing spaces * remove unnecessary backtick * update backtick command substitution to dollar/parens form --- README.md | 30 +++++++++++++++--------------- 1 file changed, 15 insertions(+), 15 deletions(-) diff --git a/README.md b/README.md index f0a1719..e89bc55 100644 --- a/README.md +++ b/README.md @@ -51,7 +51,7 @@ Quick and easy install script provided by Docker: curl -sSL https://get.docker.com/ | sh ``` -If you're not willing to run a random shell script, please see the [installation](https://docs.docker.com/installation/) instructions for your distribution. +If you're not willing to run a random shell script, please see the [installation](https://docs.docker.com/installation/) instructions for your distribution. If you are a complete Docker newbie, you should follow the [series of tutorials](https://docs.docker.com/linux/started/) now. @@ -214,7 +214,7 @@ Docker.com hosts its own [index](https://hub.docker.com/) to a central registry ### Run local registry -You can run a local registry by using the [docker distribution](https://github.com/docker/distribution) project and looking at the [local deploy](https://github.com/docker/distribution/blob/master/docs/deploying.md) instructions. +You can run a local registry by using the [docker distribution](https://github.com/docker/distribution) project and looking at the [local deploy](https://github.com/docker/distribution/blob/master/docs/deploying.md) instructions. Also see the [mailing list](https://groups.google.com/a/dockerproject.org/forum/#!forum/distribution). @@ -240,7 +240,7 @@ Also see the [mailing list](https://groups.google.com/a/dockerproject.org/forum/ * [ARG](https://docs.docker.com/engine/reference/builder/#arg) defines a build-time variable. * [ONBUILD](https://docs.docker.com/reference/builder/#onbuild) adds a trigger instruction when the image is used as the base for another build. * [STOPSIGNAL](https://docs.docker.com/engine/reference/builder/#stopsignal) sets the system call signal that will be sent to the container to exit. -* [LABEL](https://docs.docker.com/engine/userguide/labels-custom-metadata/) apply key/value metadata to your images, containers, or daemons. +* [LABEL](https://docs.docker.com/engine/userguide/labels-custom-metadata/) apply key/value metadata to your images, containers, or daemons. ### Tutorial @@ -366,7 +366,7 @@ docker port CONTAINER $CONTAINERPORT This is where general Docker best practices and war stories go: * [The Rabbit Hole of Using Docker in Automated Tests](http://gregoryszorc.com/blog/2014/10/16/the-rabbit-hole-of-using-docker-in-automated-tests/) -* [Bridget Kromhout](https://twitter.com/bridgetkromhout) has a useful blog post on [running Docker in production](http://sysadvent.blogspot.co.uk/2014/12/day-1-docker-in-production-reality-not.html) at Dramafever. +* [Bridget Kromhout](https://twitter.com/bridgetkromhout) has a useful blog post on [running Docker in production](http://sysadvent.blogspot.co.uk/2014/12/day-1-docker-in-production-reality-not.html) at Dramafever. * There's also a best practices [blog post](http://developers.lyst.com/devops/2014/12/08/docker/) from Lyst. * [A Docker Dev Environment in 24 Hours!](https://engineering.salesforceiq.com/2013/11/05/a-docker-dev-environment-in-24-hours-part-2-of-2.html) * [Building a Development Environment With Docker](https://tersesystems.com/2013/11/20/building-a-development-environment-with-docker/) @@ -456,7 +456,7 @@ To enable user namespaces ("remap the userns") in Ubuntu 15.10, [follow the blog ### Security Roadmap The Docker roadmap talks about [seccomp support](https://github.com/docker/docker/blob/master/ROADMAP.md#11-security). -There is an AppArmor policy generator called [bane](https://github.com/jfrazelle/bane), and they're working on [security profiles](https://github.com/docker/docker/issues/17142). +There is an AppArmor policy generator called [bane](https://github.com/jfrazelle/bane), and they're working on [security profiles](https://github.com/docker/docker/issues/17142). ## Tips @@ -469,25 +469,25 @@ Sources: ``` alias dl='docker ps -l -q' docker run ubuntu echo hello world -docker commit `dl` helloworld +docker commit $(dl) helloworld ``` ### Commit with command (needs Dockerfile) ``` -docker commit -run='{"Cmd":["postgres", "-too -many -opts"]}' `dl` postgres +docker commit -run='{"Cmd":["postgres", "-too -many -opts"]}' $(dl) postgres ``` ### Get IP address ``` -docker inspect `dl` | grep IPAddress | cut -d '"' -f 4 +docker inspect $(dl) | grep IPAddress | cut -d '"' -f 4 ``` or install [jq](https://stedolan.github.io/jq/): ``` -docker inspect `dl` | jq -r '.[0].NetworkSettings.IPAddress' +docker inspect $(dl) | jq -r '.[0].NetworkSettings.IPAddress' ``` or using a [go template](https://docs.docker.com/reference/commandline/inspect) @@ -505,7 +505,7 @@ docker inspect -f '{{range $p, $conf := .NetworkSettings.Ports}} {{$p}} -> {{(in ### Find containers by regular expression ``` -for i in $(docker ps -a | grep "REGEXP_PATTERN" | cut -f1 -d" "); do echo $i; done` +for i in $(docker ps -a | grep "REGEXP_PATTERN" | cut -f1 -d" "); do echo $i; done ``` ### Get Environment Settings @@ -529,7 +529,7 @@ docker ps -a | grep 'weeks ago' | awk '{print $1}' | xargs docker rm ### Delete stopped containers ``` -docker rm -v `docker ps -a -q -f status=exited` +docker rm -v $(docker ps -a -q -f status=exited) ``` ### Delete dangling images @@ -562,12 +562,12 @@ docker images -viz | dot -Tpng -o docker.png ### Slimming down Docker containers [Intercity Blog](http://bit.ly/1Wwo61N) -- Cleaning APT in a RUN layer -This should be done in the same layer as other apt commands. -Otherwise, the previous layers still persist the original information and your images will still be fat. +- Cleaning APT in a RUN layer +This should be done in the same layer as other apt commands. +Otherwise, the previous layers still persist the original information and your images will still be fat. ``` RUN {apt commands} \ - && apt-get clean \ + && apt-get clean \ && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* ``` - Flatten an image