Drawing an ellipse
You are given a pen, pencil, pair of compasses, scissors, a ruler and a piece of paper. I require a natural way to draw an ellipse. This can be simple, fr...
04 Apr 2026 0 READS
How do I route my internet through a SSH tunnel?
Old Q How do I setup an OpenVPN server without root privileges? Is there a way to setup an OpenVPN server without root privileges? E.g. with configuration...
04 Apr 2026 0 READS
An example of Kirchhoff equation
I'm studying about a simply kind of Kirchhoff equation in one-dimensional that means $$\begin{cases} u_{tt}(x,t)-\left(1+\int_{0}^{1}{u^2_x(x,t)dx}\r...
04 Apr 2026 0 READS
What should the total space be for 4 3TB Drives in RAID10 configuration?
I just configured 4 3TB drives in a RAID-10 configuration but the total disk space in the RAID is 4TB. I used the following guide to setup the RAID-10, RA...
04 Apr 2026 0 READS
How can I change KDE Meta+P options
When I press META+P, I get the following options using KDE: Switch to external screen Switch to laptop screen Unify outputs Extend to left Extend to right...
04 Apr 2026 0 READS
Find the area of a triangle given the coordinates of its vertices
The following is a GRE practice test question which I don't understand. According to this general argument, it appears that any arbitrary point $(x, ...
04 Apr 2026 0 READS
Minimum number of attempts to guess a PIN code, given constraints
I'm playing a video game at the moment called Sleeping Dogs, in which some of the mini-missions are to 'hack' a security camera, by guessin...
04 Apr 2026 0 READS
Is $\ 7!=5040\ $ the largest highly composite factorial?
A highly composite number is a natural number $\ n\ge 1\ $ that has more divisors than any smaller natural number $\ m\ge 1$. Checking the $\ 1000\ $ entr...
04 Apr 2026 0 READS
Install gcc-8 only on Ubuntu 18.04?
I just installed Lubuntu 18.04 LTS. There are two options for installing gcc: gcc-7 and gcc-8. Both are available from apt-get install out of the box. Eve...
04 Apr 2026 0 READS
Cannot Install Google Chrome. How do I fix it?
I can't install Google Chrome browser. I wonder why and how to fix it. Here is the log I got from my terminal when installing Google Chrome. $ sudo d...
04 Apr 2026 0 READS
