Memcached is a buzzword whenever it comes to the cache mechanism for modern-day web applications. It is a memory object caching system specifically designed to enhance the speed of web applications by reducing load on the database server. In simpler terms, it takes the memory from that part of the system which is not in… Read More »
Redis (Remote Dictionary Server) is an open-source software used to store structured data, which can be used as a database, cache, or message broker. It is known for its speed and versatility. In this article, you will be guided through the process of installing and securing Redis on an Ubuntu machine. Installation 1. Prerequisites There… Read More »
If you are running kubuntu inside virtualbox as a guest os, then you need to install the guest additions as well. Its an extra set of drivers that improves integration between the host and the guest and provides a bunch of features like shared clipboard, native screen resolution, better mouse pointer integration, shared folders etc…. Read More »
MySQL is one of the most popular relational database management systems (RDMS) available. While it’s an ideal RDMS for both small and large-scale applications, being free and open-source (before Oracle acquired it) made it even more popular and versatile. If you are running web applications or database applications on linux servers, then most likely you… Read More »
Intel Quick Sync Video is the technology used in intel integrated gpu’s to enable hardware accelerated encoding and decoding of videos. It supports multiple codecs like H.264(avc), H.265 (hevc), MPEG-2 etc. In this quick tutorial we take a quick look at how to use this technology inside ffmpeg to encode and decode videos. Install non-free… Read More »
Multipass is a lightweight, command-line virtualization tool developed by Canonical that allows you to create and manage Ubuntu virtual machines (VM) on your local machine. It lets you run multiple isolated instances of Ubuntu for development and testing. Multipass is cross-platform, which means you can run it on macOS, Windows, and Linux. However, on Linux,… Read More »
Docker is a popular “containerization” platform that allows developers to run applications inside isolated environments called containers. Containers are similar to virtual machines, however they do not run an entire operating system (like virtualbox, qemu). In principle containers are somewhat similar to the classic that could be used to setup a completely isolated environment within… Read More »
Switch to better DNS servers Switch to better dns servers like google dns or open dns. I personally use google dns servers: 8.8.8.8 , 8.8.4.4 Right click on the network management icon on the system tray and “Configure Network Connections”. Go to IPv4 tab and enter the dns servers as shown below. You can also… Read More »
Qemu(+KVM) is a powerful virtualization solution for linux oses. KVM (Kernel based Virtual Machine) is a module built into the linux kernel that provides it virtualization capabilities. Qemu is a hardware emulator that uses kvm to provides all necessary features to create and launch virtual machines with guest operating systems. The other more commonly used… Read More »
Kubuntu / Ubuntu 23.04 I am running Kubuntu 23.04 with Plasma desktop. You can check your ubuntu version with the lsb_release command: silver@ubuntussd:~$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 23.04 Release: 23.04 Codename: lunar silver@ubuntussd:~$ The interesting thing this time is that kubuntu has been installed on an external… Read More »
Qemu+kvm is an excellent free virtualisation solution for linux host systems. It can run any gui operating system pretty much like virtualbox or vmware. KVM provides virtualised access to cpu and memory whereas qemu emulates other hardware components like disk drives. Together they provide a complete solution to launch a virtual machine that a user… Read More »
Aptitude Aptitude is the another command that can be used to manage packages from the commandline just like and apt-get. Aptitude is considered better and superior to apt-get for a number of reasons. One benefit of aptitude is that when removing a certain package, aptitude will remove all dependencies of that package as well, so… Read More »
Sometimes, we want to run Ubuntu in live mode and test a few programs or commands that need to be installed first. Ubuntu supports installing packages in a live session in the same way as in a fully installed setup. However, when trying to install package in a live session, often times the following error… Read More »
After you install Ubuntu inside VirtualBox its necessary to install guest additions in order to enable enhanced features like native screen resolution, seamless windows, shared clipboard, shared folders and few others. Without it, you would probably have to work with a standard resolution like 1024×768 as the default virtual machine does not support every possible… Read More »
DNS Leak DNS Leak is commonly seen in vpn connections, when all the http traffic goes through the vpn tunnel, however the dns queries go directly to system/isp dns servers bypassing the vpn tunnel, which breaks the privacy protection offered by the vpn. Unless dns leaks are fixed, you are not fully privacy guarded in… Read More »
In a pervious article we discussed about the important cpu performance metrics like usage, temperature, power and clock frequency. In this article we shall take a look at various methods of monitoring the same on Ubuntu or similar linux distros. There are quite a few commands on linux for monitoring cpu metrics. If you just… Read More »
So recently I was looking for a command to check the live power consumption of cpu in watts. I tried different commands like powertop, powerstat, lm-sensors but none of them worked properly. lm-sensors did show the temperatures of individual cores of the cpu, but could not display the watts being consumed in realtime. Other commands… Read More »
Encrypting a usb drive is an excellent idea for ensure that your data is safe and secure. If you are storing business data or any kind of personal sensitive information in a usb drive, its important to keep it safe it from hackers and snoopers. Or if you accidentally loose your usb drive then you… Read More »
Getting detailed information about the wifi adapter on a linux system is not straight forward using gui tools. However there are simple commands that can do the trick. In this article we shall take a look at commands like iwconfig, iwlist, iw and nmcli which can be used to probe details about the wifi adapter… Read More »
Xdebug is a powerful debugging and profiling tool for php that allows you to find and fix errors faster by showing the entire stack trace and source code file and line number. If you want your php development to be error free you should use something like xdebug right from the beginning. A very useful… Read More »