Skip to content

Instantly share code, notes, and snippets.

View alexprivalov's full-sized avatar

alexprivalov alexprivalov

13 followers · 16 following
View GitHub Profile
@alexprivalov
alexprivalov / git_tips
Last active August 29, 2015 14:09 — forked from AgiosAndreas/repo-full-copy.sh
# Клонируем исходный репозиторий без рабочего каталога (--bare)
git clone --bare https://github.com/exampleuser/old-repository.git
cd old-repository.git
# Делаем mirror-push(будут скопированы все ветки и тэги) в новый репозиторий
git push --mirror https://github.com/exampleuser/new-repository.git
cd ..
# Удаляем папку с репозиторием
@alexprivalov
alexprivalov / howto-manually-add-trust-cert-to-rubygems.md
Last active August 29, 2015 14:12

SSL upgrades on rubygems.org and RubyInstaller versions

UPDATE 2014-12-21: RubyGems 1.8.30, 2.0.15 and 2.2.3 have been released. It requires manual installation, please see instructions below.

Hello,

If you reached this page, means you've hit this SSL error when trying to

@alexprivalov
alexprivalov / bridge.cpp
Last active August 29, 2015 14:14 — forked from pazdera/bridge.cpp
/*
* Example of `bridge' design pattern
* Copyright (C) 2011 Radek Pazdera
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
@alexprivalov
alexprivalov / select_server.c
Last active March 8, 2020 09:37
/**
Handle multiple socket connections with select and fd_set on Linux
Silver Moon ( [email protected])
*/
#include <stdio.h>
#include <string.h> //strlen
#include <stdlib.h>
#include <errno.h>
@alexprivalov
alexprivalov / latency.txt
Created January 5, 2018 08:57 — forked from jboner/latency.txt
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers
--------------------------
L1 cache reference 0.5 ns
Branch mispredict 5 ns
L2 cache reference 7 ns 14x L1 cache
Mutex lock/unlock 25 ns
Main memory reference 100 ns 20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy 3,000 ns 3 us
Send 1K bytes over 1 Gbps network 10,000 ns 10 us
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD
@alexprivalov
alexprivalov / t470s.md
Created February 3, 2018 13:35 — forked from okapies/t470s.md
Ubuntu 16.04 on ThinkPad T470s

This is a document describing how to install Ubuntu 16.04 LTS on ThinkPad T470s.

My Hardware

  • CPU: Intel Core i7-7600U (2.80GHz, 4MB cache)
  • Graphics: Intel HD Graphics 620
  • Display: 14” WQHD (2560 X 1440) IPS Non-Touch Anti-Glare
  • Memory: 24GB DDR4 2133 MHz (8GB Onboard + 16GB)
  • SSD: PCIe-NVMe 256G OPAL 2.0
  • Wireless: Intel Dual Band Wireless AC (2x2) 8265 Bluetooth 4.1
  • Fingerprint Reader
@alexprivalov
alexprivalov / iptables.txt
Created June 9, 2019 07:29 — forked from mhils/iptables.txt
mitmproxy client ip spoofing
You currently suggest the following iptables rules:
# iptables -A PREROUTING -s {SOURCE} -p tcp -m tcp --dport 80 -j
REDIRECT --to-ports 8080
In order to utilize fully transparent mode, you also need:
# iptables -t mangle -N DIVERT
# iptables -t mangle -A PREROUTING -p tcp -m socket -j DIVERT
# ip tables -t mangle -A DIVERT -j MARK --set-mark 0x2/0x2 # your mark may vary
# iptables -t mangle -A DIVERT -j ACCEPT