11/24/2021»»Wednesday

Linux In Docker

  1. Run Linux In Docker
  2. Kali Linux In Docker Container

No matter your distribution of choice, you’ll need a 64-bit installation and a kernel at 3.10 or newer. Kernels older than 3.10 do not have the necessary features Docker requires to run containers; data loss and kernel panics occur frequently under certain conditions.

Linux

Check your current Linux version with uname -r. You should see something like 3.10.[alphanumeric string].x86_64.

Mail Server Linux Installation in 10 minutes? Here you will learn step-by-step how to install and set up all necessary applications to have a fully featured. Oracle provides support to Oracle Linux subscription customers via the My Oracle Support portal. The Oracle Linux Docker images are covered by Oracle Linux Basic and Premier support subscriptions. Customers should follow existing support procedures to obtain support for Oracle Linux running in a Docker container. Docker is an incredibly powerful system that can make your job easier and your company more flexible and agile. For more information on what Docker can do, issue the command man docker and read through the man page. Learn more about Linux through the free “Introduction to Linux” course from The Linux Foundation and edX. In your Home Assistant UI go to the Configuration panel - Server management and click the “Restart” button. You can go to the Developer Tools - Services, select the service homeassistant.restart and click “Call Service”. Restart it from a terminal.

Debian and Ubuntu

Docker runs on:

  • Ubuntu Xenial 16.04 LTS
  • Ubuntu Wily 15.10
  • Ubuntu Trusty 14.04 LTS
  • Ubuntu Precise 12.04 LTS
  • Debian testing stretch
  • Debian 8.0 Jessie
  • Debian 7.0 Wheezy (you must enable backports)

Debian Wheezy

If so, you need to enable backports (if not, ignore this section):

  1. Log into the system and open a terminal with sudo or root privileges (or run sudo -i from your terminal).
  2. Open /etc/apt/sources.list.d/backports.list with your favorite text editor (if the file does not exist, create it).
  3. Remove existing entries.
  4. Add an entry for backports on Debian Wheezy:
  5. Update your packages:

Ubuntu Precise 12.04

If so, you need to make sure you have the 3.13 kernel version. You must upgrade your kernel:

  1. Open a terminal on your system.
  2. Update aptitude:
  3. Install the additional packages:
  4. On a graphical Ubuntu environment, you need to additionally run the following:
  5. Reboot your system:

Update Aptitude

  1. Log onto your system with a user with sudo privileges.
  2. Open a terminal window.
  3. Purge the older repositories:
  4. Update your packages, making sure apt works with https and the server has CA certificates:
  5. Get the new GPG key:
  6. Open or create the file /etc/apt/sources.list.d/docker.list in your favorite text editor (you need sudo or root for this).
  7. Add an entry for your OS

    VersionSource
    Ubuntu Precise 12.04 LTSdeb https://apt.dockerproject.org/repo ubuntu-precise main
    Ubuntu Trusty 14.04 LTSdeb https://apt.dockerproject.org/repo ubuntu-trusty main
    Ubuntu Wily 15.10 LTSdeb https://apt.dockerproject.org/repo ubuntu-wily main
    Ubuntu Xenial 16.04 LTSdeb https://apt.dockerproject.org/repo ubuntu-xenial main
    Debian Wheezydeb https://apt.dockerproject.org/repo debian-wheezy main
    Debian Jessiedeb https://apt.dockerproject.org/repo debian-jessie main
    Debian Stretch/Siddeb https://apt.dockerproject.org/repo debian-stretch main
  8. Save and close the file.
  9. Update Aptitude again:
  10. Verify Aptitude pulls from the right repository:
Linux

Install Docker

If you use Ubuntu Trusty, Wily, or Xenial, install the linux-image-extra kernel package:

  1. Install Docker:
  2. Start Docker:
  3. Verify Docker:

Run Linux In Docker

The Docker Group

If you prefer, you can set up a docker group to run Docker (instead of root). However, as docker must have sudo access, docker receives the same access as root.

  1. Run the following command to create a Docker group on Ubuntu:
  2. Log out and back in.

  3. Run the following command to create a Docker group on Debian:

    You may specify a user instead of ${USER} if you prefer.

  4. Verify a successful Docker installation:

Red Hat Enterprise Linux (RHEL) and CentOS

Docker runs on RHEL 7 and CentOS 7.

Install Docker

Install with Yum

  1. Log into your system as a user with sudo privileges.
  2. Update your system: sudo yum update -y.
  3. Add the yum repo (use the code below for both RHEL 7 and CentOS 7):
  4. Install Docker:
  5. Start Docker:
  6. Verify Docker:

Install with the Docker Installation Script

  1. Log into your system as a user with sudo privileges.
  2. Update your system:
  3. Run Docker’s installation script:

    This script adds the docker.repo repository and installs Docker.

  4. Start Docker:
  5. Verify Docker:
Linux In Docker

The Docker Group

Kali Linux In Docker Container

If you prefer, you can set up a docker group to run Docker (instead of root). However, as docker must have sudo access, docker receives the same access as root.

  1. Run the following command to create a Docker group and add your user to the group (replace USERNAME with your username):
  2. Log out and back in.
  3. Verify Docker works without sudo:

Start Docker at Boot

Run one of the following:

  • sudo chkconfig docker on
  • sudo systemctl enable docker

Common Issues

Note: Members in the docker group have root privileges. Hardening Docker is covered in a future tutorial.

Ubuntu

Ubuntu Utopic 14.10 and 15.05 exist in Docker’s apt repository without official support. Upgrade to 15.10 or [preferably] 16.04. If you use Ubuntu 12.04, you need to update your kernel.

Debian

Windows

If you run Debian Wheezy, you need to update the sources with backports.

“Cannot connect to the Docker daemon. Is ‘docker daemon’ running on this host?”

If you get this error, you need to unset DOCKER_HOST; run unset DOCKER_HOST to clear the variable.

Next: Using Docker Hub
All about how to use Docker's hosted registry.

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