Update local images
docker pull DISTRONAME:latest for example docker pull ubuntu:latest
Save changes to your docker container
You can save changes you make to your docker container by getting the container id and running the following command docker commit CONTAINERID IMAGENAME for example after installing apache I ran docker commit 89c48ac17dd7 apache-simple
Remove a local docker image
When you run “docker images” you’ll get results that look something like this REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE ubuntu latest 1d073211c498 2 weeks ago 187.9 MB To remove a image type “docker rmi -f IMAGE_ID (the 3rd column above). Warning this is permanent.
Prepare a docker container for AWS (elastic beanstalk)
cd to the directory containing your exported docker files, then run zip ../FILENAME.zip -r * .[^.]* This way kind of sucks, looking for a better way to do it.
List your local and running docker images and containers
To list your installed docker images run docker images To list your running docker containers run docker ps
Docker installation documentation
Docker installation information can be found at http://docs.docker.com/engine/installation/
Install a linux distro on docker
Unbuntu docker run –rm -ti ubuntu:latest /bin/bash Fedora docker run –rm -ti fedora:latest /bin/bash CentOS docker run –rm -ti centos:latest /bin/bash
Export a docker container
Export a container (for use with amazon web services for example) by running the following command: docker export CONTAINERNAME > NAME.tar for example docker export fsk-apache > fsk-apache.tar
Build a docker base image
See docker documentation http://docs.docker.com/engine/articles/baseimages/
Build your docker image
docker build -t GROUPNAME/DOCKERPAGENAME:VERSION DIRECTORY so for example docker build -t example/ docker-node-hello:latest .
Installing docker
If you’re using linux you can install docker by doing the following: ubuntu apt-get install docker.io sudo ln -sf /usr/bin/docker.io /usr/local/bin/docker Fedora yum -y install docker-io Mac OSX Install the docker toolbox Windows Also has a tool box but I’ve never used it. Docker Cheatsheet https://github.com/wsargent/docker-cheat-sheet
Amazon – recommended repo
The default repos for Amazon’s Centos are lacking a lot. Add this repo to the default Amazon Centos setup. in /etc/yum.repos.d/ius.repo comment out: mirrorlist=http://dmirr.iuscommunity.org/mirrorlist?repo=ius-el5&arch=$basearch add: baseurl=http://dl.iuscommunity.org/pub/ius/stable/Redhat/5/$basearch
Updating Drupal
The best way to handle minor updates is to first back everything up (your web directory and your database) then download the new version of drupal to a directory (lets use ~/drupalupdate as the download directory and /var/www/html as the webdirectory) cd into the download directory and run the following command find * -type f -exec echo cp {} /var/www/html/{} \; This one just test everything and echos what it would really do. If everything looks good run find * […]
Print the total bytes of files in a directory grouped by date
ls -l|awk ‘length($6)==3{x[$6″ “$7]+=$5};END{for(i in x)printf”%s:\t%d\n”,i,x[i]}’
Reset the mysql root password
Stop the mysql daemon Restart mysql using the command mysqld_safe –skip-grant-tables Now you should be able to connect as root Once connected run the following: update user set Password=PASSWORD(‘new-password’) where user=’root’; then flush privileges exit mysql restart mysql and you should be able to login with the new password
Remove top navbar from wordpress
Edit wp-includes/functions.php and add the following add_action(‘after_setup_theme’, ‘remove_admin_bar’); function remove_admin_bar() { if (!current_user_can(‘administrator’) && !is_admin()) { show_admin_bar(false); } } Now the top navbar will only showup for admin users.