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
In this article you will learn a couple of methods on how to fix Fail2ban High Memory Usage problem. There may be several reasons for Fail2ban consumption a very large amount of memory (in my case it was about 2,5… Continue Reading
How to fix error in Debian Linux: server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none Try to reinstall certificates: # apt-get install –reinstall ca-certificates Then add root certificates: sudo mkdir /usr/local/share/ca-certificates/cacert.orgsudo wget -P /usr/local/share/ca-certificates/cacert.org http://www.cacert.org/certs/root.crt http://www.cacert.org/certs/class3.crtsudo update-ca-certificates Discuss article in… Continue Reading
In this article you will learn how to Fix Zabbix Warning: Lack of Free Swap Space, and manually clear swap memory in Linux. The problem has 3 solutions, create or increase swap space, increase server RAM, and finally we can… Continue Reading