How to set up Ubuntu on Windows 7 using Virtualbox and Vagrant? [closed]

Note I’m a student in the course and I didn’t create this config file all I need to run virtual machine acts like Linux to able to study with my computer config File ubuntu version, I downloaded and set up the vagrant already and I use it with a flask in localhost, I run this […]


How to Limit concurrency in a webapp when GC pauses last more than the average response time?

I’m trying to implement a concurrency limiter in a web application where the average response time is 5 ms. I’ve based my implementation on “Performance Under Load“, forking the project concurrency-limits and using the concepts explained in the amazing tech talk “Stop Rate Limiting! Capacity Management Done Right“. I’ve measured the amount of concurrent request […]

Problem with next() and previous() methods in ListIterator in java

import java.util.Scanner; public class Main_songs { public static Scanner scanner=new Scanner(; public static PlayList play=new PlayList(); public static void main(String[] args) { boolean quit=false; while(!quit) { System.out.println(“Enter your choice”); System.out.println(“0.quit\n”+ “1.Add song in playlist\n”+ “2.remove song from playlist\n”+ “3.forward song\n”+ “4.backward song\n”+ “5.replay current song\n”+ “6.list all songs\n”+ “7.create new album\n”+ “8.Add songs to album”); […]

How to add Turf.js squareGrid layer to mapbox gl?

I am new to this and trying to add a grid layer, using Mapbox GL. Would appreciate some help. var bbox = [-95, 30 ,-85, 40]; var cellSide = 50; var options = {units: ‘miles’}; var squareGrid = turf.squareGrid(bbox, cellSide, options);

Is there a way to center the drop down menu under the li in the nav bar?

I’m trying to make a drop down menu under a horizontal nav item in css. It works, but I would like it centered under the parent menu item which is “Services” in this case. This is its current state. I tried giving it a width and doing margin:auto, but that didn’t work. CSS: nav { […]

Development Linux Ubuntu

Linux command for finding unique file contents in many text files

I have a bunch of files displaying error messages, each of which has a traceback. Many of these have the same error message, and I’d like to have a list of all unique error messages in every file. How do I find the set of unique file contents? EDIT: To clarify, each file contains a […]

what device might control an IDE hard drive drive coil wipe function?

I have a CF-28 Panasonic toughbook. it has a coil around the hard drive that can allegedly wipe the (mechanical) disk in the event I so choose. It is attached as part of the standard mini IDE connector. Even so, Im not sure what device file would address the control of the coil. Are there […]

Openstack on Ubuntu 16.04

When I am trying to install sudo snap install conjure-up –classic, there is an error popping up “error: unable to contact snap store ” OS – cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=16.04 DISTRIB_CODENAME=xenial DISTRIB_DESCRIPTION=”Ubuntu 16.04.6 LTS” # snap version snap 2.40 snapd 2.40 series 16 ubuntu 16.04 kernel 4.4.0-170-generic # snap list No snaps are installed yet. […]