ssh: how to fix warning about ECDSA host key

I’m trying to setup password-less SSH on an Ubuntu server with ssh-copy-id myuser@myserver, but I’m getting the error: Warning: the ECDSA host key for ‘myserver’ differs from the key for the IP address ‘192.168.1.123’ What’s causing this, and how do I fix it? Remove the cached key for 192.168.1.123 on the local machine: ssh-keygen -R 192.168.1.123

How to Manage File and Folder Permissions in Linux

For many users of Linux, getting used to file permissions and ownership can be a bit of a challenge. It is commonly assumed, to get into this level of usage, the command line is a must. Although there is always far more power and flexibility to be had, running seemingly complicated command isn’t alwaysa necessity. With … Read moreHow to Manage File and Folder Permissions in Linux

Tutorial: Install a LAMP Web Server on Amazon Linux 2

The following procedures help you install an Apache web server with PHP and MariaDB (a community-developed fork of MySQL) support on your Amazon Linux 2 instance (sometimes called a LAMP web server or LAMP stack). You can use this server to host a static website or deploy a dynamic PHP application that reads and writes information to … Read moreTutorial: Install a LAMP Web Server on Amazon Linux 2

SETTING UP JAVA ENVIRONMENT VARIABLE ON EC2

STEPS TO SET JAVA ENVIROMENT VARIABLE ON EC2 IN 4 SIMPLE STEPS. First, check the version of JDK Step 1: Ensure you have right version of JAVA installed or upgrade if necessary (Optional) The latest version of JAVA is 1.8, by default Amazon Linux has JAVA version 1.7 so you would directly want to upgrade it use command below … Read moreSETTING UP JAVA ENVIRONMENT VARIABLE ON EC2

My screen went gray: how to turn off Windows 10 color filter mode

Maybe this has happened to you. You went to copy a quote from a press release and, suddenly, this is what you saw: Where’d my color go? I couldn’t figure out what the hell had happened, but my screen was suddenly gray. It was at the correct resolution, and everything looked the same except it … Read moreMy screen went gray: how to turn off Windows 10 color filter mode