https://pop.com.sgExplosive pop stories with broad entertainment appeal.en-usSat, 08 Aug 2026 23:48:50 -0400https://pop.com.sg/if-we-know-the-congruence-of-the-apex-and-the-base-of-two-isosceles-ar.htmlhttps://pop.com.sg/if-we-know-the-congruence-of-the-apex-and-the-base-of-two-isosceles-ar.htmlWell, there are general criteria for congruence of triangles: SAS (Side-Angle-Side) ASA (Angle-Side-Angle) SSS (Side-Side-Side) SAA (Side-Angle-Angle) And there are some criteria for specific tri......Sun, 09 Aug 2026 03:47:13 -0400https://pop.com.sg/predicates-quantifiers.htmlhttps://pop.com.sg/predicates-quantifiers.htmlHow to express these in terms of predicates & quantifiers : Some properties are tautologies The negation of a contradiction is a tautology The dis junction of two contingencies can be a tautol......Sun, 09 Aug 2026 03:41:33 -0400https://pop.com.sg/which-sets-are-present-in-every-model-of-zf.htmlhttps://pop.com.sg/which-sets-are-present-in-every-model-of-zf.htmlAs in the title: the existence of which sets is implied by the axioms of $\mathsf{ZF}$? For example one such set would be the empty set whose existence is demanded by the Axiom of the Empty Set. ......Sun, 09 Aug 2026 03:35:13 -0400https://pop.com.sg/what-is-the-fourier-transform-of-a-functional.htmlhttps://pop.com.sg/what-is-the-fourier-transform-of-a-functional.htmlGenerally Fourier transforms are defined as follows, $$ F(s)=\int dxf(x)e^{-isx}.$$ Similarly, is it possible to define Fourier Space for a functional $$\psi[\phi(x)]~?$$...Sun, 09 Aug 2026 03:27:25 -0400https://pop.com.sg/finding-the-derivative-of-x-using-the-limit-definition.htmlhttps://pop.com.sg/finding-the-derivative-of-x-using-the-limit-definition.htmlPlease Help me derive the derivative of the absolute value of x using the following limit definition. $$\lim_{\Delta x\rightarrow 0}\frac{f(x+\Delta x)-f(x)}{\Delta x} $$ I have no idea as to how ......Sun, 09 Aug 2026 03:26:57 -0400https://pop.com.sg/propositional-logic-entailment.htmlhttps://pop.com.sg/propositional-logic-entailment.htmlI'm trying to understand propositional logics and the concepts of entailment, but I'm struggling. The concepts don't seem to be difficult in theory, but are very strange-looking when examined. For ...Sun, 09 Aug 2026 03:23:17 -0400https://pop.com.sg/simplifying-using-boolean-algebra.htmlhttps://pop.com.sg/simplifying-using-boolean-algebra.htmlI was doing the following question. Using the following rules of boolean algebra: _ law 1: X+X=1 law 2: X.1=X law 3:X.Y+X.Z = X.(Y+Z) simplify: __ _ __ ABC+ABC+ABC+ABC I have ...Sun, 09 Aug 2026 03:21:24 -0400https://pop.com.sg/user-kemish-jimenez-mathematics-stack-exchange.htmlhttps://pop.com.sg/user-kemish-jimenez-mathematics-stack-exchange.htmlQ&A for people studying math at any level and professionals in related fields...Sun, 09 Aug 2026 03:17:53 -0400https://pop.com.sg/are-the-actuarial-exams-hard-closed.htmlhttps://pop.com.sg/are-the-actuarial-exams-hard-closed.htmlI heard that they are difficult. Is this true? Are they like the qualifying exams in grad school? For example, is the probability exam and the financial math exam comparable to qualifying exams (e.g. ...Sun, 09 Aug 2026 03:16:50 -0400https://pop.com.sg/integration-by-parts-of-x-5-ln-x.htmlhttps://pop.com.sg/integration-by-parts-of-x-5-ln-x.htmlI have to integrate the function: $x^5\ln(x)$ My Attempt $$\int(x^5\ln(x))dx$$ $u=\ln(x)$ and $du=\frac{1}{x}dx$ $dv=x^5dx$ and $v=\frac{x^6}{6}$ Using this I can then integrate the function using ......Sun, 09 Aug 2026 02:47:38 -0400https://pop.com.sg/mutually-orthogonal-set-of-vectors.htmlhttps://pop.com.sg/mutually-orthogonal-set-of-vectors.htmlShow that the standard basis: $$..$$ $\mathscr{B} = \left\{ \begin{bmatrix} 1 \\ 0 \\ 0 \\ 0 \end{bmatrix}, \begin{bmatrix} 0 \\ 1 \\ 0 \\ 0 \end{bmatrix}, \begin{bmatrix} 0 \\ 0\\ 1 \\ 0 \end{bmat......Sun, 09 Aug 2026 02:43:34 -0400https://pop.com.sg/non-integral-powers-of-a-matrix.htmlhttps://pop.com.sg/non-integral-powers-of-a-matrix.htmlQuestion Given a square complex matrix $A$, what ways are there to define and compute $A^p$ for non-integral scalar exponents $p\in\mathbb R$, and for what matrices do they work? My thoughts Int......Sun, 09 Aug 2026 02:30:07 -0400https://pop.com.sg/geometric-interpretation-of-linear-transformation.htmlhttps://pop.com.sg/geometric-interpretation-of-linear-transformation.htmlI have a linear transformation, given by the following matrix $$ \begin{pmatrix} x_1\\ x_2 \end{pmatrix} \mapsto \begin{pmatrix} 2 & 2\\ -1 & -1\\ \end{pmatrix} \begin{pmatrix} x_1\\ x_2 \end{...Sun, 09 Aug 2026 02:24:54 -0400https://pop.com.sg/finding-the-radius-of-a-third-tangent-circle.htmlhttps://pop.com.sg/finding-the-radius-of-a-third-tangent-circle.htmlSorry if this is a foolish question, but I'm having difficulty understanding how to solve for $r_3$ in the following diagram... According to WolframAlpha's page on tangent circles, the radius of $......Sun, 09 Aug 2026 02:23:43 -0400https://pop.com.sg/proving-the-double-differential-of-z-z-implies-z-sinx.htmlhttps://pop.com.sg/proving-the-double-differential-of-z-z-implies-z-sinx.htmlIn common usage, we know that $$\frac{d^2z}{dx^2}=-z\,$$ implies $z$ is of the form $a\sin x + b\cos x$. Is there a proof for the same. I was trying to arrive at the desired function but couldn't ...Sun, 09 Aug 2026 02:17:17 -0400https://pop.com.sg/find-a-formula-for-sin-5x-in-terms-of-sin-x-and-cos-x.htmlhttps://pop.com.sg/find-a-formula-for-sin-5x-in-terms-of-sin-x-and-cos-x.htmlI was asked to find a formula for $\sin(5x)$ in terms of $\sin(x)$ and $\cos(x)$. I thought about using euler formula which gives: $$\sin(5x) = e^{i\sin(5x)} = \cos(\sin(5x))+i\cdot sin(\sin(5x))$$......Sun, 09 Aug 2026 02:12:55 -0400https://pop.com.sg/what-does-a-polynomial-function-039-s-increasing-and-decreasing-interv.htmlhttps://pop.com.sg/what-does-a-polynomial-function-039-s-increasing-and-decreasing-interv.htmlNow I know that smarter and more interesting question were asked over here, but bear with me. When someone says,"the increasing interval of this polynomial function is (-infinity, 4)," when does it ...Sun, 09 Aug 2026 02:10:43 -0400https://pop.com.sg/integration-by-parts-done-fast.htmlhttps://pop.com.sg/integration-by-parts-done-fast.htmlEven though I've been through countless instances where I needed to use integration by parts, to this day, I still derive it from the chain rule, identify my 'parts' and apply the formula. At some ...Sun, 09 Aug 2026 02:09:21 -0400https://pop.com.sg/what-does-cap-product-actually-mean.htmlhttps://pop.com.sg/what-does-cap-product-actually-mean.htmlI have read the Wikipedia definition of cap product. Here is the Wikipedia definition that I know. https://en.wikipedia.org/wiki/Cap_product What I understand: For a good space, for example, an ...Sun, 09 Aug 2026 02:07:41 -0400https://pop.com.sg/proposition-2-9-of-hatcher-039-s-algebraic-k-theory-and-vector-bundles.htmlhttps://pop.com.sg/proposition-2-9-of-hatcher-039-s-algebraic-k-theory-and-vector-bundles.htmlhttps://www.math.cornell.edu/~hatcher/VBKT/VB.pdf Reading through Hatcher's proof of the the induced exact sequence of $\widetilde{K}$ groups, I've run into a few issues. I'm unsure of how there......Sun, 09 Aug 2026 01:59:47 -0400https://pop.com.sg/origin-of-vectors.htmlhttps://pop.com.sg/origin-of-vectors.htmlBackground I was reviewing notes of physics, and i realized that something about the mathematics of vectors was wrong in my head. Example-problem Suppose a vector is $A=5\textbf{i} + 3\textbf{......Sun, 09 Aug 2026 01:49:50 -0400https://pop.com.sg/how-to-find-the-derivative-of-a-fraction.htmlhttps://pop.com.sg/how-to-find-the-derivative-of-a-fraction.htmlSo I have this fancy problem I've been working on for two days: I need to find two things: 1) $f'(t)$ 2) $f'(2)$ I have tried plugging it into the definition of a derivative, but do not know how......Sun, 09 Aug 2026 01:48:43 -0400https://pop.com.sg/understanding-variable-of-integration.htmlhttps://pop.com.sg/understanding-variable-of-integration.htmlI am currently trying to get a deeper understanding of multivariable calculus and I am finding my one stumbling block to be the variable of integration. In single variable calculus, I have always ...Sun, 09 Aug 2026 01:44:56 -0400https://pop.com.sg/is-it-possible-to-apply-cofactor-expansion-to-a-2-x-2-matrix-why-is-th.htmlhttps://pop.com.sg/is-it-possible-to-apply-cofactor-expansion-to-a-2-x-2-matrix-why-is-th.htmlSolved: the determinant of a constant has the same value as that constant. It is possible to apply cofactor expansion to a two-by-two matrix. For example, this matrix: $$ \left[ \begin{array}{cc}......Sun, 09 Aug 2026 01:37:01 -0400https://pop.com.sg/method-of-characteristics-lagrange-charpit-equations.htmlhttps://pop.com.sg/method-of-characteristics-lagrange-charpit-equations.htmlI need to solve the following PDE with initial condition $U(x,0)=U_0(x)$. Once this is one of my first times, I'd like to get second opinions. Many Thanks. \begin{equation} \partial_t U + (\te......Sun, 09 Aug 2026 01:35:39 -0400https://pop.com.sg/number-of-elementary-multiplications-for-multiplying-4x4-matrices.htmlhttps://pop.com.sg/number-of-elementary-multiplications-for-multiplying-4x4-matrices.htmlApplying recursively Strassen's algorithm on 4x4 matrices results in 49 elementary multiplications. Are there methods tailored for 4x4 matrices which can do better? Links to articles are highly ...Sun, 09 Aug 2026 01:34:36 -0400https://pop.com.sg/understanding-the-order-of-approximation-big-o-notation.htmlhttps://pop.com.sg/understanding-the-order-of-approximation-big-o-notation.htmlAssume that $n+1$ different grid points $x_0,...,x_n$ are given. Exercise: determine the coefficients $a_i$ such that de order $(k)$ of the error: $$\left|\,f'(x) - Q(h)\right| = O(h^k)$$ is maxi......Sun, 09 Aug 2026 01:31:10 -0400https://pop.com.sg/why-is-there-a-constant-of-integration.htmlhttps://pop.com.sg/why-is-there-a-constant-of-integration.html$\int (2x^2 +1)dx = \dfrac{2}{3}x^3 + x +C$. This is a simple integral, and as you all know, the answer to an integral will always have a '$+C$' at the end, the constant of integration. Why is it......Sun, 09 Aug 2026 01:31:02 -0400https://pop.com.sg/rate-of-change-area-and-perimeter.htmlhttps://pop.com.sg/rate-of-change-area-and-perimeter.htmlThe side of rectangle $x = 20m$ increases at the rate of $5m/s$, the other side $y=30m$ decreases at $4m/sec$. What is the rate of change o the perimeter and area of the retangle? If we put this ...Sun, 09 Aug 2026 00:59:38 -0400https://pop.com.sg/minimize-total-cost-of-box.htmlhttps://pop.com.sg/minimize-total-cost-of-box.htmlSo there is a rectangular box that has a volume of $8 m^3$. The top and bottom of the box is made with some material that has a cost of $8$ dollars per square meter. The sides are made with another ...Sun, 09 Aug 2026 00:56:43 -0400https://pop.com.sg/what-will-be-installed-windows-or-ubuntu-on-factory-data-reset-on-pre-.htmlhttps://pop.com.sg/what-will-be-installed-windows-or-ubuntu-on-factory-data-reset-on-pre-.htmlI have Dell Inspiron 15 5000 Series which had Windows 10 Preinstalled but I love Ubuntu so I have installed Ubuntu 20 LTS. My question is what if I do factory data rest to this machine, what will be ...Sun, 09 Aug 2026 00:56:27 -0400https://pop.com.sg/simplify-square-root-expression-sqrt-125-sqrt-5.htmlhttps://pop.com.sg/simplify-square-root-expression-sqrt-125-sqrt-5.html$\sqrt{125}-\sqrt5$ simplify it. I thought it would be $\sqrt {5\cdot5\cdot5}-\sqrt 5$ which would be the square root of 25 which is 5 but it is not. Can you show how to simplify this?...Sun, 09 Aug 2026 00:56:23 -0400https://pop.com.sg/the-complement-of-a-graph-g.htmlhttps://pop.com.sg/the-complement-of-a-graph-g.htmlI have a homework problem where I have a graph $G$ and I am tasked with proving that at least one of $G$ and $G$ complement is connected. However, I am unclear on the exact meaning of $G$ complemen......Sun, 09 Aug 2026 00:29:52 -0400https://pop.com.sg/alternative-proof-that-base-angles-of-an-isosceles-triangle-are-equal.htmlhttps://pop.com.sg/alternative-proof-that-base-angles-of-an-isosceles-triangle-are-equal.htmlThe "classic textbook proof" of equality of base angles of an isosceles triangles which I studied in my school days is as follows: Let $\Delta ABC$ be a triangle with $AB = AC$ and let $D$ be the ......Sun, 09 Aug 2026 00:23:25 -0400https://pop.com.sg/find-the-equation-of-the-sine-function-graphed-below.htmlhttps://pop.com.sg/find-the-equation-of-the-sine-function-graphed-below.htmlFind the equation of the sine function graphed below. Write a cosine function for the graph below. Assume the least possible phase shift....Sun, 09 Aug 2026 00:22:49 -0400https://pop.com.sg/solving-a-matrix-with-one-variable.htmlhttps://pop.com.sg/solving-a-matrix-with-one-variable.htmlI have a system of equations as follows: $$1x + hy = -5$$ $$2x - 8y = 6$$ My question is how do I work with such a variable in a matrix? Thank you....Sun, 09 Aug 2026 00:12:48 -0400https://pop.com.sg/can-i-use-only-the-super-key-as-a-shortcut.htmlhttps://pop.com.sg/can-i-use-only-the-super-key-as-a-shortcut.htmlUsually in Gnome and KDE it is only possible to define shortcuts with the Super key in combination with another key. But is it possible to use only the Super key as a shortcut, and how could I achi......Sat, 08 Aug 2026 23:51:23 -0400https://pop.com.sg/fan-noise-reduction-asrock-motherboard-amd-ryzen.htmlhttps://pop.com.sg/fan-noise-reduction-asrock-motherboard-amd-ryzen.htmlI am asking this question because I noticed there wasn't an obvious answer for beginners. The problem is very simple: I have a pretty noisy Wraith Spire CPU fan. Normally, it could run at a silent ......Sat, 08 Aug 2026 23:44:13 -0400https://pop.com.sg/monoprice-drawing-tablet-mp1060-ha60.htmlhttps://pop.com.sg/monoprice-drawing-tablet-mp1060-ha60.htmlI've purchased this model 6814 tablet from Monoprice and am trying to use it in Gimp and Inkscape in 14.04. It seems that previously, there was a driver "wizardpen" for non-Wacom tablets which is no ...Sat, 08 Aug 2026 23:38:24 -0400https://pop.com.sg/osu-installer-restarts-all-the-time-wine.htmlhttps://pop.com.sg/osu-installer-restarts-all-the-time-wine.htmlWhen I try to install osu! with wine the installer goes too 100% and then restarts in an endless loop. What can I do to fix this?...Sat, 08 Aug 2026 23:34:42 -0400https://pop.com.sg/unable-to-print-with-brother-mfc-290c.htmlhttps://pop.com.sg/unable-to-print-with-brother-mfc-290c.htmlI have an Ubuntu 12.04 laptop from which I want to print in a Brother MFC-290C printer wired to a Win7 PC. Printer is already being shared by PC. I've tried to install the printer via Alt+F2 system-...Sat, 08 Aug 2026 23:31:26 -0400https://pop.com.sg/gnu-radio-radar-toolbox.htmlhttps://pop.com.sg/gnu-radio-radar-toolbox.htmlI am trying to download the GNU Radio Radar Toolbox from this link(https://github.com/kit-cel/gr-radar). I followed the steps listed in that link, but when I reach the {cmake ../} it gives that: -- ...Sat, 08 Aug 2026 23:30:48 -0400https://pop.com.sg/how-to-disable-screen-saver-in-totem-when-playing-movie.htmlhttps://pop.com.sg/how-to-disable-screen-saver-in-totem-when-playing-movie.htmlI'm using Ubuntu 11.10. There's a option in Totem that says to disable screen saver while playing movie, but it doesn't work. Is there anything else I can do to make it work ?...Sat, 08 Aug 2026 23:26:49 -0400https://pop.com.sg/syntax-error-039-unexpected-end-of-file.htmlhttps://pop.com.sg/syntax-error-039-unexpected-end-of-file.htmlWhen I open a terminal, I get: bash: /root/.bashrc: line 115: syntax error: unexpected end of file bashrc has # ~/.bashrc: executed by bash(1) for non-login shells. # see /usr/share/doc/bash/exa......Sat, 08 Aug 2026 23:13:22 -0400https://pop.com.sg/how-to-merge-multiple-pdf-files-into-a-single-file-duplicate.htmlhttps://pop.com.sg/how-to-merge-multiple-pdf-files-into-a-single-file-duplicate.htmlIs there any software or methods available to merge multiple PDF files into a single file?...Sat, 08 Aug 2026 23:11:33 -0400https://pop.com.sg/questions-tagged-xrdp.htmlhttps://pop.com.sg/questions-tagged-xrdp.htmlQ&A for Ubuntu users and developers...Sat, 08 Aug 2026 23:09:40 -0400https://pop.com.sg/how-do-i-disable-headphone-controls.htmlhttps://pop.com.sg/how-do-i-disable-headphone-controls.htmlI'm running Ubuntu 18.04 on a Lenovo Thinkpad X1 Carbon 7th Generation. I have Bose QC20 headphones which have volume and start/stop controls on them. The headphones controls have started continu......Sat, 08 Aug 2026 23:00:24 -0400https://pop.com.sg/when-trying-to-install-on-mac-no-mountable-file-system.htmlhttps://pop.com.sg/when-trying-to-install-on-mac-no-mountable-file-system.htmlI downloaded Ubuntu 14.04.2 - desktop. When I try to open the file, I have the following error message: NO MOUNTABLE FILE SYSTEM. What should I do to solve this problem?...Sat, 08 Aug 2026 22:53:19 -0400https://pop.com.sg/move-a-file-to-a-directory-requiring-root-permission.htmlhttps://pop.com.sg/move-a-file-to-a-directory-requiring-root-permission.htmlI'm a complete noob to Linux and Ubuntu. I'm running Ubuntu Studio 20.04. I downloaded a plugin for Audacity that needs to go from home/greg/downloads into usr/share/audacity/plug-ins. I tried the ...Sat, 08 Aug 2026 22:47:47 -0400https://pop.com.sg/can-intel-i7-1065g7-run-ubuntu-20-04-duplicate.htmlhttps://pop.com.sg/can-intel-i7-1065g7-run-ubuntu-20-04-duplicate.htmlI am new on Linux based operation systems.It will be my first time so I need your help. I just bought HP Pavilion 14-CE3005NT and it has great hardwares but the processor. The hardware list of this ...Sat, 08 Aug 2026 22:47:35 -0400https://pop.com.sg/mpif-h-not-found-error-install-openmpi.htmlhttps://pop.com.sg/mpif-h-not-found-error-install-openmpi.htmlI was trying to install openpi on ubuntu. I have an Ubuntu 18.04.4 LTS (64 bit) desktop. I installed openmpi using sudo apt-get install openmpi-bin openmpi-common openmpi-doc libopenmpi2 libopenmp......Sat, 08 Aug 2026 22:45:04 -0400https://pop.com.sg/how-can-i-enable-custom-svg-fonts-for-image-viewer-eye-of-gnome.htmlhttps://pop.com.sg/how-can-i-enable-custom-svg-fonts-for-image-viewer-eye-of-gnome.htmlI have some SVG files with custom fonts. I can open them and fonts look nice in Firefox, but the font is not properly displayed in Eye of Gnome (Image Viewer) application. Why is this so, and how c......Sat, 08 Aug 2026 22:44:01 -0400https://pop.com.sg/how-to-assign-one-node-among-specific-nodes-in-slurm.htmlhttps://pop.com.sg/how-to-assign-one-node-among-specific-nodes-in-slurm.htmlI want to submit a job using one node among a specific nodelist. Suppose, nodes 151-154 are my specific node. So, Here is my script: #!/bin/sh #SBATCH --job-name=k89a1 #SBATCH --nodes=1 #SBATCH --t......Sat, 08 Aug 2026 22:36:18 -0400https://pop.com.sg/fan-not-recognized-on-an-hp-nc6400.htmlhttps://pop.com.sg/fan-not-recognized-on-an-hp-nc6400.htmlI'm using Ubuntu 11.10 and an HP nc6400 laptop, and it doesn't recognize my fans, which means that my laptop keeps overheating, is there anyway to make it recognize them? Thanks in advance :)...Sat, 08 Aug 2026 22:18:52 -0400https://pop.com.sg/what-to-do-after-failed-to-start-load-kernel-modules.htmlhttps://pop.com.sg/what-to-do-after-failed-to-start-load-kernel-modules.htmlI tried to upgrade my system from Ubuntu 14.04. My laptop froze for a few hours. Not even the pointer did anything. So I switched off by pressing the power button for a few seconds. This uncompleted ...Sat, 08 Aug 2026 22:17:25 -0400https://pop.com.sg/unable-to-give-static-ip-to-my-machine.htmlhttps://pop.com.sg/unable-to-give-static-ip-to-my-machine.htmlI have an issue while assigning static IP to my Machine. I am new to this forum and in Linux world as well, just now I installed Ubuntu Desktop LTS 14.04 on Virtual Machine. When I checked ifconfig......Sat, 08 Aug 2026 22:16:14 -0400https://pop.com.sg/how-can-i-change-or-install-screensavers.htmlhttps://pop.com.sg/how-can-i-change-or-install-screensavers.htmlI want to change the default screen saver in Ubuntu 11.10/12.04. On 11.04 I just did a sudo apt-get install xscreensaver-data-extra xscreensaver-screensaver-bsod And then I could change it in the ...Sat, 08 Aug 2026 22:13:20 -0400https://pop.com.sg/installing-libx11-a-libx11-so-and-xlib-h.htmlhttps://pop.com.sg/installing-libx11-a-libx11-so-and-xlib-h.htmlI installed libx11-dev with following command; sudo apt-get install libx11-dev I need libX11.a, libX11.so and Xlib.h files. When I searched these files I couldn't locate them. I need to install l......Sat, 08 Aug 2026 22:12:46 -0400https://pop.com.sg/use-windows-bitlocker-encrypted-drive-on-ubuntu.htmlhttps://pop.com.sg/use-windows-bitlocker-encrypted-drive-on-ubuntu.htmlHow could I mount my BitLocker encrypted drive on Ubuntu? I have checked the Wine website, and it had no BitLocker support, and I have no idea how to install Dislocker on my computer. I can not ......Sat, 08 Aug 2026 22:02:49 -0400https://pop.com.sg/wireless-not-recognized-on-my-lenovo-g510-laptop-on-ubuntu-15-04.htmlhttps://pop.com.sg/wireless-not-recognized-on-my-lenovo-g510-laptop-on-ubuntu-15-04.htmlHow do I enable my Broadcom wireless network adapter on Ubuntu 15.04 offline? I have no LAN access....Sat, 08 Aug 2026 22:02:45 -0400https://pop.com.sg/how-can-i-make-virtualbox-guests-share-the-host-039-s-vpn-connection.htmlhttps://pop.com.sg/how-can-i-make-virtualbox-guests-share-the-host-039-s-vpn-connection.htmlQuestion When I start my VPN on my ubuntu desktop computer which acts as a router, the attached subnet loses internet connectivity, but is still accessible (LAN). Ideally, I would like to know how......Sat, 08 Aug 2026 21:53:41 -0400https://pop.com.sg/sharing-files-with-win10-bash-shell.htmlhttps://pop.com.sg/sharing-files-with-win10-bash-shell.htmlI have the Win10/bash shell enabled on my computer and would like to share the files from "my documents" folder with Bash. I have followed the following instructions* from my university, but I can'......Sat, 08 Aug 2026 21:47:02 -0400https://pop.com.sg/how-do-i-change-extension-of-multiple-files-recursively-from-the-comma.htmlhttps://pop.com.sg/how-do-i-change-extension-of-multiple-files-recursively-from-the-comma.htmlI have many files with .abc extension and want to change them to .edefg How to do this from command line ? I have a root folder with many sub-folders, so the solution should work recursively....Sat, 08 Aug 2026 21:42:56 -0400https://pop.com.sg/ubuntu-14-04-slow-on-asus-eeebox-pc-eb1030.htmlhttps://pop.com.sg/ubuntu-14-04-slow-on-asus-eeebox-pc-eb1030.htmlso i upgraded to ubuntu 14.04 from 12.04 with a usb but i have internet ,my computer is really slow at 1024x768 definition ,everything works super slow ,windows closing and opening and streaming vi......Sat, 08 Aug 2026 21:35:28 -0400https://pop.com.sg/how-to-turn-on-word-wrapping-of-icon-names-in-20-04.htmlhttps://pop.com.sg/how-to-turn-on-word-wrapping-of-icon-names-in-20-04.htmlI just upgraded from 18 to 20.04lts, and the file names on the desktop icons are all truncated with ellipsis. This is what i've tried: $ gsettings list-recursively | grep ellipsis org.nemo.icon-vie......Sat, 08 Aug 2026 21:35:00 -0400https://pop.com.sg/how-to-format-a-usb-or-external-drive-in-kubuntu-12-04-01.htmlhttps://pop.com.sg/how-to-format-a-usb-or-external-drive-in-kubuntu-12-04-01.htmlI am aware that similar questions have been answered before for different versions/releases of Ubuntu, but I cannot find an application to reformat a USB stick in Kubuntu 12.04.01. Right-clicking the ...Sat, 08 Aug 2026 21:30:33 -0400https://pop.com.sg/ffmpeg-vs-avconv-specifically-use-of-lavfi-in-avconv.htmlhttps://pop.com.sg/ffmpeg-vs-avconv-specifically-use-of-lavfi-in-avconv.htmlI have been trying to create a sine wave with avconv. I have read online that avconv is very similar to ffmpeg and much of the syntax of one should be almost identical to be used in the other. Sear......Sat, 08 Aug 2026 21:30:12 -0400https://pop.com.sg/where-is-the-hostfile-located.htmlhttps://pop.com.sg/where-is-the-hostfile-located.htmlworking on setting up a local development environment. Im pretty new to Linux. I am using Virtualbox for Ubuntu server inside of the Ubuntu Desktop I am running. After setting up port forwarding I am ...Sat, 08 Aug 2026 21:24:24 -0400https://pop.com.sg/what-type-of-sequences-are-escape-sequences-starting-with-033.htmlhttps://pop.com.sg/what-type-of-sequences-are-escape-sequences-starting-with-033.htmlI found many escape sequences in Bash starting with \033], but what are these sequences and why are they starting with \033]?...Sat, 08 Aug 2026 21:18:48 -0400https://pop.com.sg/how-can-i-get-around-using-xclip-in-the-linux-subsystem-on-win-10.htmlhttps://pop.com.sg/how-can-i-get-around-using-xclip-in-the-linux-subsystem-on-win-10.htmlOn a Linux subsytem on Windows 10 you get an error when using xclip, ex: cat some/file.txt | xclip Error: Can't open display: (null) There is no Desktop (UI), so of course there isn't a clipboard......Sat, 08 Aug 2026 21:01:10 -0400https://pop.com.sg/gta-vice-city-requires-directx-8-1-how-can-i-run-it.htmlhttps://pop.com.sg/gta-vice-city-requires-directx-8-1-how-can-i-run-it.htmlDoes anyone know how to run this game "GTA Vice City" on Ubuntu? I kept getting Directx 8.1 error when I run the game. I have also installed the latest version of Wine. I also facing the same issues ...Sat, 08 Aug 2026 20:57:53 -0400https://pop.com.sg/when-using-byobu-in-a-putty-session-cannot-create-new-windows.htmlhttps://pop.com.sg/when-using-byobu-in-a-putty-session-cannot-create-new-windows.htmlI have an Ubuntu 10.04.4 web server, and I have set it to run byobu on session startup. To start with it all seems to work fine, for example F9 brings up the menu and F7 starts the copy/paste proc......Sat, 08 Aug 2026 20:54:15 -0400https://pop.com.sg/automating-user-creation-with-information-from-text-file.htmlhttps://pop.com.sg/automating-user-creation-with-information-from-text-file.htmlI have one txt in this format: dfs /home/dfs ashik karki so now i need a bash script for reading the each word from the text file and what i am going to do is i want to automate adduser and gener......Sat, 08 Aug 2026 20:47:25 -0400https://pop.com.sg/some-program-to-change-the-bpm-of-a-track.htmlhttps://pop.com.sg/some-program-to-change-the-bpm-of-a-track.htmlSomeone knows some program in Ubuntu to change the bpm of a track, retaining the tone. I've tried with Audacity, but when changing the bpm, it also changes the tone. Any idea? Maybe whit LMMS? Tha......Sat, 08 Aug 2026 20:44:01 -0400https://pop.com.sg/long-iptables-rules-efficiency-performance.htmlhttps://pop.com.sg/long-iptables-rules-efficiency-performance.htmlWhen building a long iptables rules, which one is more efficient, to use one long script per line or to use the tables? What about the performance, does it have effect to packets loss and untracked ...Sat, 08 Aug 2026 20:39:57 -0400https://pop.com.sg/how-to-install-opencv-2-9-for-python.htmlhttps://pop.com.sg/how-to-install-opencv-2-9-for-python.htmlI have been having the exact same problem as described in this post and someone in the answers suggested that you upgrade to opencv version 2.9. I was wondering how do that? I installed the vers......Sat, 08 Aug 2026 20:38:20 -0400https://pop.com.sg/fails-to-install-drivers-error-with-a-bcm-4312-duplicate.htmlhttps://pop.com.sg/fails-to-install-drivers-error-with-a-bcm-4312-duplicate.htmlPossible Duplicate: How to get Broadcom BCM 43XX Wireless card working I am using a Dell Inspiron 1464. My wlan card is a Dell wireless 1397 whose chipset is made by Broadcom. The chip is bcm ......Sat, 08 Aug 2026 20:27:32 -0400https://pop.com.sg/playing-dvd-movies-on-ubuntu-21-10.htmlhttps://pop.com.sg/playing-dvd-movies-on-ubuntu-21-10.htmlI have installed Ubuntu version 21.10 on a friends 12-year-old Gateway laptop. I tried playing a DVD movie with the Videos software included with Ubuntu, it opens the movie but then it just gives a......Sat, 08 Aug 2026 20:08:01 -0400https://pop.com.sg/run-ls-but-skip-first-3-files.htmlhttps://pop.com.sg/run-ls-but-skip-first-3-files.htmlLet's say ls -t returns: 1 2 3 4 5 6 How can I skip the first 3 results? So the result is only: 4 5 6 I am aware I can run ls -t | head -3 but that will simply take the first 3 lines, but I need to ...Sat, 08 Aug 2026 19:58:03 -0400https://pop.com.sg/broadcom-bcm5764m-gigabit-ethernet-won-039-t-connect-at-gigabit-speed.htmlhttps://pop.com.sg/broadcom-bcm5764m-gigabit-ethernet-won-039-t-connect-at-gigabit-speed.htmlI've got an HT Z600 with the intergrated ethernet 5764 PCIe LOM controller. When I check advertised speed with sudo ethtool enp1s0 I can see advertised link modes of 10,100,1000baseT, half and full ...Sat, 08 Aug 2026 19:52:05 -0400https://pop.com.sg/how-to-elevate-a-programs-privileges-on-the-fly-duplicate.htmlhttps://pop.com.sg/how-to-elevate-a-programs-privileges-on-the-fly-duplicate.htmlI'm relatively new to Linux (coming from Windows) and one thing that always bugs me is how restrictive the system is. For example I'm trying to install Sublime Text 2 into /opt/ right now, but when I ...Sat, 08 Aug 2026 19:45:51 -0400https://pop.com.sg/can-039-t-install-via-usb-stick.htmlhttps://pop.com.sg/can-039-t-install-via-usb-stick.htmlI'm installing the latest version but it says that files is unable to copy on harddisk due to usb is burned too fast it gives this error in between of the installation I can try it but can't instal......Sat, 08 Aug 2026 19:36:40 -0400https://pop.com.sg/reasonable-size-for-filesystem-reserved-blocks-for-non-os-disks.htmlhttps://pop.com.sg/reasonable-size-for-filesystem-reserved-blocks-for-non-os-disks.htmlWhen creating a file system ( mkfs ...) the file system reserves 5% of the space for its own use because, according to man tune2fs: Reserving some number of filesystem blocks for use by privil......Sat, 08 Aug 2026 19:28:08 -0400https://pop.com.sg/command-for-determining-my-public-ip-old-question.htmlhttps://pop.com.sg/command-for-determining-my-public-ip-old-question.htmlCommand for determining my public IP? According to "Michael K" who answered the question my computer won't know the public Ipv4 address but it somehow knows the public ipv6 address. Why i......Sat, 08 Aug 2026 19:20:08 -0400https://pop.com.sg/how-to-convert-latex-equations-to-svg.htmlhttps://pop.com.sg/how-to-convert-latex-equations-to-svg.htmlAt the moment, I'm using mimetex to automatically convert a bunch of equations into gif-images. The program is fast, but the images look pretty bad: How can I (quickly) convert a LaTeX equation i......Sat, 08 Aug 2026 19:19:06 -0400https://pop.com.sg/can-not-use-bt-wifi-with-fon-ubuntu-14-04.htmlhttps://pop.com.sg/can-not-use-bt-wifi-with-fon-ubuntu-14-04.htmlI've been trying to connect to BT Wifi with FON. It connects to the network but no login page shows and when it does its very slow and i can not get past it. My friend with a MAC is easily able to ...Sat, 08 Aug 2026 19:17:19 -0400https://pop.com.sg/change-conda-environment-to-the-preinstalled-system-python-version.htmlhttps://pop.com.sg/change-conda-environment-to-the-preinstalled-system-python-version.htmlI switched to Linux completely 4months ago. I have been able to install Anaconda in my Ubuntu 20.04, but I observed something which is like a headache. After setting up an environment, I needed to ......Sat, 08 Aug 2026 19:04:09 -0400https://pop.com.sg/why-don-039-t-i-have-a-password-for-su-problems-with-sudo.htmlhttps://pop.com.sg/why-don-039-t-i-have-a-password-for-su-problems-with-sudo.htmlI have installed Ubuntu using the GUI, giving myself a password and everything. I do not intricately remember the process. However, what worries me is that I don't know the following password: $ su ...Sat, 08 Aug 2026 19:03:21 -0400https://pop.com.sg/why-does-the-blender-tpaw-package-exist.htmlhttps://pop.com.sg/why-does-the-blender-tpaw-package-exist.htmlLooking for Blender in the software store and I see "blender-tpaw" package What does this package do and how is it separate from blender?...Sat, 08 Aug 2026 18:59:18 -0400https://pop.com.sg/how-to-make-a-new-cron-job-for-python-scripts-to-update-mysql.htmlhttps://pop.com.sg/how-to-make-a-new-cron-job-for-python-scripts-to-update-mysql.htmlI'm a newbie to setup a Cron jobs. i have a prefix directory for my application python on /usr/local/lib/python2.7/dist-packages/prewikka and i already to new environment for my application python......Sat, 08 Aug 2026 18:43:57 -0400https://pop.com.sg/cpu-undervolting-gui-software.htmlhttps://pop.com.sg/cpu-undervolting-gui-software.htmlI have Lenovo B580 laptop with core i3. I've followed tutorial to install phc kernel and then phc software to undervolt but this soft is too complicated. Is there any other program whitch is able to ...Sat, 08 Aug 2026 18:40:50 -0400https://pop.com.sg/how-do-i-move-the-show-applications-icon-in-ubuntu-dock.htmlhttps://pop.com.sg/how-do-i-move-the-show-applications-icon-in-ubuntu-dock.htmlUbuntu 17.10 introduces the GNOME Shell with the Ubuntu Dock (based on Dash to Dock GNOME Shell extension) and it allows you to put the Dock on the bottom of the desktop: However, there is no easy......Sat, 08 Aug 2026 18:27:24 -0400https://pop.com.sg/how-to-make-zsh-the-default-shell.htmlhttps://pop.com.sg/how-to-make-zsh-the-default-shell.htmlI am trying to set ZSH as my default shell, however it keeps reverting back to bash. I have tried this code: sudo chsh -s $(which zsh) I've also tried: sudo chsh -s /bin/zsh Also tried these ...Sat, 08 Aug 2026 18:25:25 -0400https://pop.com.sg/copying-all-firmware-files-from-github-repository-kernel-git-firmware-.htmlhttps://pop.com.sg/copying-all-firmware-files-from-github-repository-kernel-git-firmware-.htmlI copied the whole content of https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git to the /lib/firmware folder of my system. I do not face any issues and it fixed the missing ...Sat, 08 Aug 2026 18:24:44 -0400https://pop.com.sg/unable-to-locate-package-libssl-dev-and-i-cant-find-a-solution-closed.htmlhttps://pop.com.sg/unable-to-locate-package-libssl-dev-and-i-cant-find-a-solution-closed.htmlI am trying to install libssl-dev but I keep getting error "Unable to locate package libssl-dev"...Sat, 08 Aug 2026 18:22:46 -0400https://pop.com.sg/tracker-process-taking-lot-of-cpu.htmlhttps://pop.com.sg/tracker-process-taking-lot-of-cpu.htmlI'm trying to understand what the different background processes are doing on my machine as this one is freezing from time to time. I have noticed that the tracker processes (there are several of t......Sat, 08 Aug 2026 18:08:11 -0400https://pop.com.sg/host-unreachable-through-browser-but-can-be-ping.htmlhttps://pop.com.sg/host-unreachable-through-browser-but-can-be-ping.htmlI have setup a web server, and then it's working fine when accessed through browser. Suddenly the site cannot be reached anymore (Host unreachable). I can ping the Ubuntu server but cannot accessed......Sat, 08 Aug 2026 18:02:09 -0400https://pop.com.sg/time-discrepancy-between-dmesg-and-journalctl-k.htmlhttps://pop.com.sg/time-discrepancy-between-dmesg-and-journalctl-k.htmlEdit: I couldn't find out why this weird effect happens, but I found the culprit of the actual problem (slow bootup) to be the same as described here: https://bugs.launchpad.net/ubuntu/+source/ubiq......Sat, 08 Aug 2026 17:58:21 -0400https://pop.com.sg/execute-all-files-under-a-directory-with-sed-and-find.htmlhttps://pop.com.sg/execute-all-files-under-a-directory-with-sed-and-find.htmlI'm trying to use find to execute all the files under a directory. I have a sed script that will replace all instances of # with //. Assume my directory is /path/to/directory and it contains file1,......Sat, 08 Aug 2026 17:51:27 -0400https://pop.com.sg/copy-and-paste-doesn-039-t-work-in-the-terminal.htmlhttps://pop.com.sg/copy-and-paste-doesn-039-t-work-in-the-terminal.htmlBefore you go marking this as a dupe, I know about Ctrl+Shift+C and Ctrl+Shift+V I try to use them, and it doesn't work. On one particular Ubuntu computer, normal copy paste commands do not work: ......Sat, 08 Aug 2026 17:51:22 -0400