Linux

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Why Your SSH Is Yelling About Quantum Computers (And How to Fix It)

You SSH into your server and see this:

** WARNING: connection is not using a post-quantum key exchange algorithm.
** This session may be vulnerable to "store now, decrypt later" …

Apr 17, 2026 5 min

The Power of Bash For Loops: Streamlining Your Scripting Tasks

In the world of scripting and automation, Bash stands out as a versatile and widely-used shell in Unix and Linux systems. Among its ...

Dec 02, 2023 3 min

How to Enable SSH on Ubuntu: A Step-by-Step Guide

Secure Shell (SSH) is an essential tool for system administrators, developers, and IT professionals. It provides a secure way to access ...

Oct 19, 2023 4 min

Vim: Mastering the Essentials for Efficient Editing

In the world of text editing, Vim stands out as a powerful, keyboard-centric editor that prioritizes efficiency and speed. Originating ...

Sep 25, 2023 7 min

MySQL 8: Understanding and Fixing Error 1819

As a beginner in MySQL, you might encounter an error message that reads "ERROR 1819 (HY000): Your password does not satisfy the current ...

Jul 14, 2023 3 min

Unveiling the Mystery: Decoding IP Address Retrieval in Linux

Understanding how to retrieve an IP address in Linux can be a bit tricky, especially for beginners. The good news? It's not as complicated...

May 11, 2023 3 min

CORS in Nginx: Configuration Guide for Enhanced Security

Cross-Origin Resource Sharing (CORS) is a crucial mechanism for enabling secure communication between web servers and browsers.

Apr 19, 2023 3 min

SSL CA Problem on CentOS7 Docker and Solution

When I'm playing with CentOS7 docker image on MacBookPro M1, it looks like it doesn't connect to the servers which require HTTPS connection.

For example, when I run yum -y update …

Mar 08, 2022 2 min

Extend your ec2 Linux disk without reboot on Amazon Web Services

Just follow the steps and learn how to extend without reboot. Normally, It's realy hard to extend the Linux servers root disk.

Feb 08, 2021 3 min

Find large files in CentOS, ubuntu and MacOS easily

Sometimes, it's really hard to find the big files path Linux. In this tutorial, you will learn how you can find it easily.

Jul 18, 2020 1 min

Error: No space left on the device when starting/stopping services only

Learn how to fix "No space left on the device" error when starting and/or stopping services only on Amazon Linux 2

Mar 01, 2020 2 min

Download specific file extension via wget easily on terminal

Sometimes, there may be files with more than one extension in a directory or folder. For example, .jpg, .png, .gif, .mp3, .mp4 etc.

Nov 22, 2019 1 min

Find the exact size of certain files in Linux via terminal

You may be wondering about the size of these files or just want to see the size of the files with the corresponding extension for a ...

Nov 15, 2019 3 min

Disable SELinux on CentOS 7 or CentOS 8

This tutorial shows you how you can disable SELinux on your CentOS server. The CentOS version should be CentOS 7 or CentOS 8.

Nov 08, 2019 2 min