Guidelines

How to catch stdout and stderr in different variables? Tested on Debian wheezy using GNU bash, Version 4.2.37 (1)-release (i486-pc-linux-gnu). This is for catching stdout…

Can I downgrade iOS after jailbreak? In order to fight fragmentation (and other things), Apple does not allow users to downgrade their iDevice software. So…

Why do web servers use port 80? On a Web server or Hypertext Transfer Protocol daemon, port 80 is the port that the server “listens…

How to use lmer for mixed effect modeling? IMPORTANTLY, all random slopes and intercepts can be correlated. The lmer package can be used for modeling,…

How do I get rid of the black border around my logo? Remove a page border Click on the border to select it. If you…

Is Start in Task Manager a virus? If you’ve found a process called Start.exe running on your computer, it may throw up some red flags.…

How do you stop echo in shell script? You could use Bash redirection : command > /…/path_to_file is a shortcut of the previous command. To…

What are the method of joints? The method of joints is a process used to solve for the unknown forces acting on members of a…

Can a low car battery affect electrics? Low/loss of power to electrics Your car’s battery not only starts your engine – it also powers the…

Why many RF amplifiers are used in TRF receiver? The classic TRF receivers of the 1920s and 30s usually consisted of three sections: one or…