What is a self-signed SSL certificate? A self-signed certificate is a certificate that is not signed by a trusted authority. Nevertheless, the self-signed certificate provides the same level of encryption as a $100500 certificate signed by a trusted authority. In this article i will show how to create a self-signed certificate that can be used […]
Docker: Reload Nginx Inside Container
If you want to update Nginx configuration or renew SSL certificates, you should reload Nginx to apply modifications. If you run Nginx inside Docker container you might be curious how to reload it without any downtime or connection interruptions. The best way to reload Nginx inside Docker container is to run docker container exec command […]
Systemd: Service File Examples
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 […]
Python: Virtualenv – Install | Create | (De)activate
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 […]
Install Docker on CentOS-7
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 […]
Python: Install PIP – MacOS, Ubuntu, CentOS
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).
Docker: Container Logs – How to Check
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.
Docker: Stop Container
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 […]
Docker: Enter Container
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.
Docker: Cp Command – Copy File ( To | From ) Container
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.