Most Linux distributions use systemd as a system and service manager. The systemctl is the main command in systemd, used to control services. In this tutorial i will show how to create a systemd service file that will allow you to control your service using the systemctl command, how to restart systemd without reboot to […]
virtualenv serves for creating isolated Python environments. It creates a folder with a copy of Python interpreter and a copy of the pip library which will be used to install other packages in this virtual environment without affecting other projects or system-wide libraries. virtualenv makes it easier to work on more than one project at […]
For ones, who want to build and run Docker containers on CentOS-7 – first of all it is required to install Docker itself. To install the latest version of Docker and to be able to upgrade it easily in future – it is recommended to install Docker from the official repository. In this guide i […]
pip is a tool for installing and managing Python packages. As well as Python, pip can be install on various operation systems: Linux, Mac, Windows, etc. In this post i am showing how to install pip on MacOS and how to install pip on Linux (Ubuntu and CentOS).
The docker logs command serves for accessing the logs of a container. In this post i am showing how to check the logs of a Docker container, see the timestamps and how to tail or grep these logs. I will also show how to find out where the Docker container logs are stored.
The docker stop command stops running Docker containers. To stop a container it sends the SIGTERM signal to the main process inside a Docker container requesting it to terminate. If the main process inside a container is not terminated after a grace period, the docker stop command sends the SIGKILL signal to cause it to […]
The docker exec command serves for executing commands in running Docker containers. With this command it is also possible to enter a running Docker container and start a bash session. In this post i am showing how to enter a Docker container and execute an interactive bash shell inside it.
The docker cp command serves for copying files and folders between Docker container and a host machine. It is possible to copy a file or folder from host to container as well as from container to host. In the examples below i am coping the files but the syntax for copying folders is the same.
The docker run command serves for creating containers from images. In this article i will show how to run a Docker image as a container on the example of the official latest base image of Ubuntu. I will show how to install apache2 inside a container with Ubuntu and how to save this container as […]
The docker pull command serves for downloading Docker images from a registry. By default, the docker pull command pulls images from Docker Hub, but it is also possible to manually specify the private registry to pull from. Before running the docker pull command it needs to search the Docker registry for the image to download. […]