Sometimes you may see this error “The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY B188E2B695BD4743”
You can solve this issue by running the following commands.
apt-key adv --keyserver ha.pool.sks-keyservers.net --recv-keys B188E2B695BD4743
# apt-get update
InnoDB strict mode is similar to SQL strict mode. When it is enabled, certain InnoDB warnings become errors instead.
Continue reading “InnoDB Strict Mode”
The information regarding your battery status and ACPI is stored in /proc and /sys file system. The easiest way to read this information is using the various commands line option tools as well as GUI tool on Linux operating system.
Continue reading “How to display battery status from command line”
Securing your Linux server is important to protect your data, intellectual property, and time, from the hands of crackers (hackers). The system administrator is responsible for security of the Linux box.
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OpenVPN is a free and open source VPN solution. VPN solution. As a result VPN allow to secure your data communications. It implements OSI layer 2 or 3 secure network extension using the SSL/TLS protocol. A VPN allows your yo connect securely to an insecure public network such as WiFi network at the airport or hotel. Almost companies also use VPN to access corporate or enterprise or home server resources. You can bypasss geo-blocked site and increase your privacy or safety online.
Continue reading “How to install and configure OpenVPN on Debian 10”
Proxmox Virtual Environment (PVE) is an open source server virtualization management solution based on QEMU/KVM and LXC. You can manage virtual machines, containers, highly available clusters, storage and networks with an integrated, easy-to-use web interface or via CLI.
Continue reading “Proxmox upgrade from 5.x to 6.x (Debian stretch to buster)”
In this tutorial we will be configuring Cloudflare real ip under nginx server. As a result Cloudflare service will helps protect and speed up your web site project. In a standard shared hosting plan, visitors access the site directly.
Continue reading “How to get the real IP address using CloudFlare and nginx on CentOS / Debian / Ubuntu”
The mcrypt extension is included in PHP 5.4 through PHP 7.1. It was removed from PHP 7.2 and moved to an unofficial PECL extension because the mcrypt library is no longer maintained.
Continue reading “Install mcrypt for PHP 7.2 / 7.3 on DirectAdmin server”
This tutorial explains the procedure to upgrade Debian 7 (wheezy) to Debian 10 (buster) in a few simple steps.
Continue reading “How to upgrade Debian 7 (wheezy) to 10 (buster) safely”
All packages that are included in the official Debian distribution are free according to the Debian Free Software Guidelines. This assures free use and redistribution of the packages and their complete source code. The official Debian distribution is what is contained in the main section of the Debian archive.
Continue reading “Unable to parse package file /var/lib/apt/extended_states”