Monthly Archives: December 2016

The unit of the RF signal. dB and dBm

When you are viewing RF-related documentation or logs, you often see a unit called dB and dBm. In fact, I did not use them differently until now. But I find that there are different meanings. Received Signal Strength Indicator: -49dBm The above shows the signal strength of Wi-Fi as part of the log when you… Read More »

Disk Defragmenter – HDD and SSD

SSD is replacing HDD at the present time, but it seems to me that it does not fit in the current time too much to write about disk defragmentation. But I am currently using HDD, Let’s look at the difference between SSDs and the related program Auslogics Disk Defrag. Principles of Disk Defragmentation When you… Read More »

wpa_supplicant build/compile on Ubuntu

When you are studying IEEE802.11, Wi-Fi on linux, you often need to look at the wpa_supplicant code. To study wpa_supplicant, you have to insert log into wpa_supplicant code, change the contents of the code, and try a lot. To do this, you must ensure that your code is working properly when you build the base… Read More »

OpenWrt, building the package part.

[OpenWrt, Create customized full Image] If you have done a full build once with reference to the above article, you will be able to build a partial package and install only the packages created by that build. In other words, the entire build is not necessary when you modify something, so it can be confirmed quickly.… Read More »

Terminator, Linux multi-split terminal

When you use Ubuntu, basically, the following basic terminal program is included. As it is a basic terminal, it is faithful to basic, but there is one inconvenience. When you open multiple terminals, the previously opened terminals are hidden from the back. So what I found is a program called a terminator. If you… Read More »

Linux / Ubuntu, Make CD / DVD ISO

You do not need Linux to make a CD / DVD to ISO. However, in order to create it on Windows, you have to install programs that you have not heard easily such as BurnAware, ISOMaker and IMGBurn. When I installed these programs, I did not know what to leave on my Windows, so I… Read More »