On a linux system you can get details about the wifi adapter using commands like iw, iwconfig, iwlist, ethtool etc. However if you are a usb wifi adapter then it can be tricky. When you plug a usb wifi adapter on your system, linux will not show the details of the device in the lspci… Read More »
In this article we take a quick look at testing wifi throughput over lan using a simple tool called iperf. Wifi lan speed matters when you are transferring large files across devices. For example transferring a big video or zip file from ipad or smartphone to desktop pc connected on ethernet. Wifi speed is not… 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 »
OpenVPN OpenVPN is open source, secure and robust. It is readily available for most platforms and can be setup quickly. The SurfShark native client also uses OpenVPN underneath. It supports both tcp and udp based wrappers for vpn traffic over internet. UDP is significantly faster than tcp and works really well. There are multiple ways… 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 »
The 7z LZMA benchmark runs dummy compression and decompression tasks to measure the overall performance of the system. It reports measurements in MIPS (million instructions per second) which give an idea of the computer’s raw processing power counting all factors. 7z LZMA compression is a multi-threaded work-load. This means that it can utilise multiple cores… Read More »
Sysbench is a command-line tool that is designed to test and benchmark database performance, but with certain options it can also be used to run tests to measure the raw performance of cpu, ram and storage devices as well. These tests can give a brief and fairly accurate assessment of the system’s performance. In this… 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 »
SSDs SSDs come in a variety of shapes and sizes. The biggest size is the 2.5″ drives that are installed inside desktop computers. Then comes the smaller and bare looking M.2 SSDs that are installed inside laptops and even on desktops. There are a lot of technical parameters that describe M.2 SSD drives about how… Read More »
What is White Uniformity Issue When reading a web-page that has black text on white background if you notice that the white background color looks different at different parts of the screen, its called white uniformity issue. The white may look slightly bluish (cooler) in some areas and slightly yellowish (warmer) in other areas. Simply… Read More »
A lot of Intel processors like the i5-7400 have integrated gpus, that work quite well with Ubuntu and similar Linux systems using the open source drivers. Besides IGPU inside CPUs, there are even some motherboards that have IGPU in their chipsets. In this article we shall take a look at some of the commands that… Read More »
Just like any other computer hardware, CPUs or processors produce a lot of heat, and it needs to be cooled down properly to get the maximum performance out of it. In the earlier years of personal computers or desktop PCs, air coolers was the standard way to cool down your cpu, and it is still… Read More »
We often receive password encrypted pdfs on our mail from various places. When saving these pdfs locally its a good idea to get rid of the password, so that we don’t need to remember it later on. On Ubuntu there are many simple ways to remove the password of a pdf files, each with its… Read More »
Connecting apple devices like iphones and ipads to other platforms like windows or linux has never been easy, simply because apple’s ecosystem does not support anything outside of it. However recent models of ipads started supporting usb drives natively. That means you can now connect the usb drive to the ipad and read/write files to… Read More »
The cpu in a computer is brain that does all the processing. It is the most important component that determines the performance of your computer. It is installed in a socket on the motherboard and can be spotted easily if you look at it. CPUs also have a heat sink and fan installed right over… Read More »
If you are upgrading an old PC that has DDR3 1066/800 Mhz RAM slots on its motherboard and planning to upgrade, then you might not be able to find new RAM modules with that frequency. Newer RAM modules available in the market will have higher frequency like 1333 Mhz and 1600Mhz. So can you put… Read More »