Ahmedur Rahman Shovon arsho

Scenario

Apps like VLC, Libreoffice do not open from the dock and cannot open associated file extension that is mapped to the app (e.g. .mp3). FYI, the apps are installed from Ubuntu app center

Fix

Uninstall the apps from Ubuntu app center (e.g. VLC, libreoffice)
Install from terminal:

sudo apt install vlc -y

Here are some steps to try if you're getting an error mounting /dev/nvme0n1p6 in Ubuntu 23.10:

Open the Disks program
Select the disk that doesn't mount
Click the Gears icon or Additional Partition Options button
Select Edit Mount Options
Disable User Session Defaults
Click OK in the Mount Options dialog box
Repeat for each drive that gives an error message

Check versions of gcc, g++, and nvcc:

gcc --version
gcc (Ubuntu 13.2.0-4ubuntu3) 13.2.0
g++ --version
g++ (Ubuntu 13.2.0-4ubuntu3) 13.2.0
nvcc --version
nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2023 NVIDIA Corporation
Built on Tue_Aug_15_22:02:13_PDT_2023

Disk usage analyzer

Open a terminal and write:

baobab

It will open an window that shows disk usage.

References

Ubuntu Baobab page

Generate SSH key with passphrase and the filename:

ssh-keygen -t ed25519 -C "[email protected]"

Go to the Settings > SSH and GPG keys page of Github
Click New SSH key
Copy the SSH key file to your clipboard, here the public key file is in ~/.ssh/id_ed25519.pub:

cat ~/.ssh/id_ed25519.pub

Four numbers each from -1 to 1 that sum up to 1

You can use Python's combination with replacement method.

from itertools import combinations_with_replacement
import csv

def get_four_numbers(target_sum=100):
 result = []

Scenario

In Ubuntu the Ethernet connection was shown as unmanaged wired connection.
This happened after using sudo pppoeconf to configure a pppoeconfiguration.

Solution

Open /etc/NetworkManager/NetworkManager.conf with sudo previlege:

sudo gedit /etc/NetworkManager/NetworkManager.conf

Change the line managed=false to managed=true

Solution to: Stuck on Dell logo in Dual Boot Dell Machine

Machine Information:

Model: Dell G5 5587
Processor: Intel core i7-8750H
Ram: 16GB
Graphics: NVIDIA 1060 GeForce GTX 1060 Mobile
SSD: 256GB
HDD: 1TB

	class Solution {
	// Function to return Breadth First Traversal of given graph.
	public ArrayList < Integer > bfsOfGraph(int V, ArrayList < ArrayList < Integer >> adj) {
	ArrayList < Integer > ans = new ArrayList < Integer > ();
	int[] color = new int[V];
	color[0] = 1;
	Queue < Integer > q = new LinkedList < > ();
	q.add(0);
	ans.add(0);
	while (q.size() != 0) {

	#include <bits/stdc++.h>
	using namespace std;

	long merge_sorted_arrays(long ar[], long temp[], long left, long mid, long right) {
	long inversion_count = 0;
	long left_pos = left;
	long right_pos = mid + 1;
	long current_pos = left;
	while (left_pos <= mid && right_pos <= right) {
	if (ar[left_pos] <= ar[right_pos]) {