yuchdev

#include <iostream>
#include <numeric>
#include <vector>

/// @brief: Calculates array of same size, where each element is the product
/// of all elements excluding corresponding by index
/// Algorithm: O(n) time, O(n) space
/// @param: array of int
/// @return: array of same size
/// @example: {1,2,3,4} => {24, 12, 8, 6}, {1, 2, 3, 4, 5} => {120, 60, 40, 30, 24}

yuchdev

rem 1.
sc config "Name of Service" start= disabled
sc stop "Name of Service"

rem 2.
wmic service where name='SQLWriter'  call ChangeStartmode Disabled

rem https://www.minitool.com/news/windows-10-services-to-disable.html
rem https://helpdeskgeek.com/windows-10/windows-10-unnecessary-services-you-can-disable-safely/
rem https://www.groovypost.com/howto/12-windows-10-services-that-are-safe-to-disable/

yuchdev

#!/bin/bash

# Install
pip3 install --user virtualenv
virtualenv –version

# Activate
virtualenv venv
source venv/bin/activate

yuchdev

#!/bin/sh

# Backup Partititon
dd if=/dev/sda of=/mnt/backup/sda.img conv=noerror
fdisk -l /dev/sda > /mnt/backup/sda.info
dd if=/dev/sdb of=/mnt/backup/sdb.img conv=noerror
fdisk -l /dev/sdb > /mnt/backup/sdb.info

# execute "git pull" in every dir
for dir in ~/projects/git/*

yuchdev

import os
import sys
import time
import random
import argparse

# Key is country code, value is the number of servers to use
SERVER_LIST = {
    "AR": [*range(1, 8)],
    "AU": [*range(13, 44)],

yuchdev

class Shell:

    def __init__(self, cd_path):
        self.cd_path = cd_path
        self.exit_path = os.getcwd()

    def __enter__(self):
        os.chdir(self.cd_path)

    def __exit__(self):

yuchdev

time python3 jira_backup.py

# Output
# real 0m1.542s
# user 0m0.299s
# sys	0m0.136s

yuchdev

#!/bin/bash

# Method 1
dd if=/dev/urandom of=/dev/null status=progress

# Method 2
# You just need to enter a controlT character from the keyboard while the dd command is executing.
# By pressing the controlT character, you are sending the same SIGINFO signal to the dd command
# that the command pkill -INFO -x dd sends.

yuchdev

sudo apt-get install sshpass

# $1: 1st command-line param, password
# $2: 2nd command-line param, username
# $3: 3rd command-line param, rsync source path
# $4: 4th command-line param, rsync destination path

/usr/bin/rsync -ratlz --rsh="/usr/bin/sshpass -p $1 ssh -o StrictHostKeyChecking=no -l $2" $3 $4

# Alternatively, you can avoid the password prompt on rsync command 

yuchdev

#!/bin/bash

/etc/init.d/syslogd stop
/etc/init.d/rsyslogd stop
sudo systemctl disable rsyslog
sudo systemctl disable syslog