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 Fix wget ERROR:… 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
In this article you will learn how to install Stress on Amazon Linux in 1 min. “Stress” is a Linux utility to load and stress a computer system. Linux Stress usage example: # stress –cpu 8 –io 4 –vm 2… Continue Reading
In this tutorial we will learn: How To Install NTP Server On CentOS 8 / CentOS 7 (CHRONY SUITE) How to configure Chrony as NTP server Introduction to the Chrony Suite Chrony is an implementation of the Network Time Protocol… Continue Reading
In this article you will learn how to install TURN Server on Ubuntu 20.04 LTC for WebRTC, configure Coturn with Long Term Credential Mechanism, configure IPTables firewall, check TURN server. The TURN server implements the STUN protocol also. Coturn is… Continue Reading
In this tmux tutorial you will learn basic tmux usage and list of of essential commands. tmux is an open-source terminal multiplexer (Terminal MUltipleXer) for Unix-like operating systems. It allows multiple terminal sessions to be accessed simultaneously in a single… Continue Reading
In this article you will learn How To Cleanup Boot Partition Ubuntu Linux. Linux boot partition can be filled with old unused kernels. In first step we need find out current Linux kernel version and unused kernels. After it remove… Continue Reading