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To save a server certificate to your local machine, we can use openssl and read from the https port 443 and save it using echo. Save the above script to a file called save_server_script.sh and give permissions. Run the script and open the directory to see the .crt file getting saved.

When you log into your DigitalOcean droplet, you keep getting warning messages about updates and you need to restart your droplet to apply them. To make these messages vanish you can just reboot your droplet by typing reboot (or sudo reboot) Once your droplet reboots, you can login and see if the messages have vanished. If you still … Read more

Updating packages in Ubuntu is sometimes needed to upgrade your Ubuntu to latest version and apply security updates. We can also upgrade all packages in the system to make sure we use the latest version of all packages. Steps below. Update repositories sudo apt update updates the Ubuntu repositories so that your system checks against the repositories … Read more

To get OS version i.e 32 bit or 64 bit, just run the following command in terminal. This will return the number your processor is based on, 32-bit processor or 64-bit processor.

We are going to use the debian package managers to install Kubectl in Ubuntu. Example Output Example 2

To know the current version of node.js / npm installed in your Ubuntu system, run the following command. Update node.js Use the following command to update Node.js:

I was trying to use kubectl and port forward the service ports to local but Ubuntu doesn’t allow to bind to 443. To fix this we can use setcap and allow the program to bind to ports.

This command queries the configured processor values using the getconf command. Example

Using a built-in variable: Using a command:

Using a built-in variable: Using a tilde: