Usually, when you get the NET::ERR_CERT_AUTHORITY_INVALID error in a Microsoft Edge browser you can bypass it by going to “Advanced” and clicking on “Continue to <website> (unsafe)” option. But it may happen that there is no such option in “Advanced”. This short note shows how to bypass the error NET::ERR_CERT_AUTHORITY_INVALID in the Microsoft Edge if […]
Kubectl: Get All Resources in Namespace
The kubectl get all command is used to list down such Kubernetes resources as Pods, Services, StatefulSets, etc. But this command doesn’t really list all the resources in a Namespace. To really get all the Kubernetes resources in the Namespace we can use the combination of the kubectl api-resources and kubectl get commands. This short […]
Git: Create Empty Branch
By default, the commands git branch <newBranchName> and git checkout -b <newBranchName> create a new branch from the current one. This means that the new branch will be based on your currently checked out (HEAD) branch, i.e. will contain all the files and commits from the parent branch. Let’s assume that you want to create […]
Mount NFS in Kubernetes Pod
An NFS (Network File System) is one of the most useful volume types in Kubernetes. To mount a directory shared from an NFS server to a container running in a Kubernetes Pod it is required to do the following: Add the NFS volume to the Pod. Set the NFS server and path to the share. […]
Bad owner or permissions on ‘.ssh/config’ [SOLVED]
Starting from Windows 10 build 1809, Windows has a native SSH client that is based on the OpenSSH port. If you try to connect to some host from a Windows command-line prompt (CMD) or PowerShell using the ssh command, you may receive the error as follows: Bad owner or permissions on C:\\Users\\<username>/.ssh/config This short note […]
Kubectl: Get ConfigMap – Kubernetes
In programming, we use .env or separate config files to store settings, configurations or variables separately from the application code. This permits to run the application in different environments. A ConfigMap in a Kubernetes is used to achieve the same functionality – it allows to make applications portable by decoupling environment-specific configurations from the containers. […]
Sublime Text: Remove Empty Lines
If you try to figure out how to remove the blank lines in a document, i.e. the lines that contain only spaces, tabs or the newline characters, you should know that in almost any IDE, like a Sublime Text, this can de done really simple. The Sublime Text, like the other IDEs, has the ability […]
Python: Send Message to Telegram
To send a message to a Telegram channel using Python, first of all it is required to create a Telegram bot. While creating the Telegram bot you will get an apiToken and a chatID that will be used in a Python script to access the Telegram API and send the message. In this note you […]
Python: Write to File | Read from File – Best Practice
To write something to a file or to read the content of a file in Python it is required to open() and close() the file properly. The best practice in Python is to read/write to a file by using the with statement – the replacement for commonly used try…finally error-handling statements. The with statement ensures […]
Run Selenium Headless – Chrome | Firefox (Python)
Selenium is an open source tool for web browsers automation that is widely used in tandem with Python to test web applications. As these tests are often automated and run on dedicated nodes, there is a sense to run Selenium in a headless mode, i.e. without opening a browser. This note shows how to run […]