Year: 2020

CentOS 8 and Fedora 32 - make DNS working for Docker containers

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In CentOS 8 and Fedora 32, by default DNS requests from Docker containers are being blocked by Firewalld. To make DNS working for Docker containers use below command (assuming that containers are using docker0 interface for networking): sudo firewall-cmd --zone=trusted --add-interface=docker0 --permanent sudo firewall-cmd --zone=trusted --add-interface=docker0

Install OpenSSH under Windows 10 and set Powershell as default shell

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Follow below steps for installation of OpenSSH server under Windows 10 OS. List available OpenSSH software for installation: Get-WindowsCapability -Online | ? Name -like 'OpenSSH*' Install OpenSSH client: Add-WindowsCapability -Online -Name OpenSSH.Client~~~~0.0.1.0 Install OpenSSH server: Add-WindowsCapability -Online -Name OpenSSH.Server~~~~0.0.1.0 Start OpenSSH service: Start-Service sshd Enable autostart for OpenSSH service: Set-Service -Name sshd -StartupType 'Automatic' Check… Continue reading Install OpenSSH under Windows 10 and set Powershell as default shell →

Generating QR Code from Linux command line

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To generate QR Code from Linux command line you can use qrencode tool. Use-case: * transfer config/text files from Linux machine to mobile phone * transfer config/text files from Linux machine when it is not possible to directly copy it (i.e. SSH session inside remote RDP session where copy to clipboard is disabled) Installation: dnf… Continue reading Generating QR Code from Linux command line →