Today I started to mine BTG on my 3GB farm. The miner consumes about 1.7MB on HiveOS:
BTG did 3X in April and theoretically it can be the most profitable coin on 3GB cards.
(more…)Resizing a partition on HiveOS
There was some strange partition /dev/sda2 of 6.5G size on my HiveOS:
root@rig0:/# cat /proc/partitions major minor #blocks name 8 0 117219767 sda 8 1 20480 sda1 8 2 7323648 sda2 root@rig0:/# df -h Filesystem Size Used Avail Use% Mounted on udev 1.9G 0 1.9G 0% /dev tmpfs 383M 44M 340M 12% /run /dev/sda2 6.8G 6.5G 0 100% / tmpfs 1.9G 0 1.9G 0% /dev/shm tmpfs 5.0M 0 5.0M 0% /run/lock tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup tmpfs 100M 16K 100M 1% /tmp tmpfs 1.9G 0 1.9G 0% /var/tmp tmpfs 1.9G 30M 1.9G 2% /var/log tmpfs 1.9G 0 1.9G 0% /var/log/journal tmpfs 1.9G 0 1.9G 0% /var/log/apt /dev/sda1 20M 5.7M 15M 29% /hive-config(more…)
Terribly slow file upload with Rostelecom internet provider
When I upload a file via SSH to my VPS server with Beeline mobile internet connection, the speed is about 300KB/sec – 800KB/sec:
Installing Jabber Messaging Service on Ubuntu 16.04
sudo apt install ejabberd ufw allow to any port 5280 proto tcp ufw allow to any port 5222 proto tcp ufw allow to any port 5269 proto tcp ufw allow to any port 7777 proto tcp sudo nano /etc/ejabberd/ejabberd.yml
##
## hosts: Domains served by ejabberd.
## You can define one or several, for example:
## hosts:
## - "example.net"
## - "example.com"
## - "example.org"
##
hosts:
- "developernote.com"
...
###. ====================
###' ACCESS CONTROL LISTS
acl:
##
## The 'admin' ACL grants administrative privileges to XMPP accounts.
## You can put here as many accounts as you want.
##
admin:
user:
- "admin": "developernote.com"
(more…) Negating the minimal integer result in an overflow in C++
The code below compiles with a warning:
#include <iostream>
#include <limits>
#include <cstdint>
int main()
{
int64_t m1 = -std::numeric_limits<int64_t>::min();
int64_t m2 = -m1;
std::cout << m1 << std::endl << m2 << std::endl << std::numeric_limits<int64_t>::max() << std::endl;
return 0;
}
(more…) Dragging a link from a browser to a QML app
When a link is dragged from a browser on Window 10 platform it contains the page title, but they did not make it accessible in QML:
import QtQuick 2.15
import QtQuick.Controls 2.15
ApplicationWindow {
visible: true
width: 640
height: 480
title: qsTr("Scroll")
id: root
DropArea {
id: dropArea;
anchors.fill: parent
onEntered: {
root.color = "gray";
drag.accept (Qt.LinkAction);
}
(more…) Running a Tron node on Ubuntu 20.04 WSL
Installed Java SDK:
sudo apt update sudo apt install default-jdk javac --version
javac 11.0.9.1
Cloned the repository:
git clone https://github.com/tronprotocol/wallet-cli
And found the following in wallet-cli\src\main\resources\config.conf:
The sum of signed and unsigned is unsigned in C++
#include <iostream>
template <typename T>
void PrintValue(T val)
{
if constexpr (std::is_signed_v<T>)
{
std::cout << "signed";
}
else
{
std::cout << "unsigned";
}
std::cout << std::endl << val << std::endl;
}
(more…) Installed Post Password Token WordPress plugin
When the user enters a page or post password WordPress sets wp_postpass_XXXX cookie:
Use chrome://settings/cookies/detail?site=developernote.com to see the cookies in Google Chrome browser.
How I used OMNI USDT client on my home Windows machine
First, as a true C++ developer, I installed Ubuntu 18.04 and compiled omnicore from sources, but after that I realized that Windows omnicore-0.9.0 client can be downloaded and run directly on my Windows 10 machine.
I found omnicore-qt.exe in the unpacked files and run it:
