David Cao

David Cao

David is a Cloud & DevOps Enthusiast. He has years of experience as a Linux engineer. He had working experience in AMD, EMC. He likes Linux, Python, bash, and more. He is a technical blogger and a Software Engineer. He enjoys sharing his learning and contributing to open-source.

Find SSH Host Key Fingerprint in Linux

In Linux, getting the SSH host key fingerprint is crucial for verifying the identity of an SSH server before establishing a connection. Here are the methods to retrieve the host fingerprint: Method 1: Using ssh-keygen Local Server To find the…

2 ways to use XLOOKUP with Multiple Criteria in Excel

Utilizing XLOOKUP with multiple criteria in Excel allows for more flexible data searching compared to traditional lookup functions. This capability enhances data analysis by enabling searches based on several conditions. Method 1: Using Boolean Logic in XLOOKUP Combine multiple criteria…

Fix SSH timed out waiting for input: auto-logout in Linux

Addressing SSH auto-logout issues often involves configuring two key settings: the TMOUT shell variable and the StopIdleSessionSec setting in /etc/systemd/logind.conf.  Each plays a distinct role in session management and inactivity handling.   Here is the error we usually get when…

7 Ways to Remove Blank Spaces in Excel

As an Excel user, you have likely encountered the problem of having unwanted spaces within your cell contents. Whether it’s due to importing data from another source, copy-pasting, or simply typing too quickly, it’s important to know how to swiftly…