In this article I will show how to find text in a file in Linux using grep command. Grep searches for patterns in each file. Patterns is one or patterns separated by newline characters, and grep prints each line that… Continue Reading
In this article I will show Raspberry Pi 4 Ubuntu WiFi Setup from command line. Identify The WiFi Card Name In Raspberry Pi 4 Ubuntu Raspberry Pi 4 has hardware WiFi card already onboard, but you can add other USB… Continue Reading
In this article you will learn how to fix error: This version of ChromeDriver only supports Chrome version 97 when you developing programs in Python. The error might look like: As you see in our example I have different versions… Continue Reading
In this article you will learn How to Allow SSH Root Login on Ubuntu 20.04 LTS Linux step by step. By default you can login as other user. SSH login as root disabled on Ubuntu for security reasons. Also By… Continue Reading
In this article I will show simile bash script if ping fails then reboot Linux server. You can easily modify this script for example if ping fails then send notification to email, or if ping successful then do something. Create… Continue Reading
In this article I will show How To Check Ethernet Connection Speed in Linux using 3 different ways. Ethtool Show Speed ethtool is powerful utility for query or control network driver and hardware settings for wired Ethernet devices. To determine… Continue Reading
In this article you will learn how to uninstall default nftables framework, install iptables Debian 11 (Bullseye) and basic rules initial configuration. Uninstall nftables and its Dependencies IPtables is being replaced by nftables starting with Debian 10 Buster. Debian 11… Continue Reading
While trying add new WEB domain with SSL support or installing Let’s Encrypt SSL Certificate in Vesta / Hestia / MyVesta Control Panel yo may have receive an error “Error: Let’s Encrypt validation status 400”. That’s It! Discuss this topic… Continue Reading
In this article you will learn how to securely wipe hard drive Linux, also how to securely delete files in Linux. First you need found correct disk path to hard drive which you want securely wipe, list hard drives in… Continue Reading
How to fix Debian 9 apt-get update error: The following signatures were invalid: EXPKEYSIG B188E2B695BD4743 DEB.SURY.ORG Automatic Signing Key To fix error we need download and install new SURI repository key: # wget -O /etc/apt/trusted.gpg.d/php.gpg https://packages.sury.org/php/apt.gpg And try re-run update:… Continue Reading