talayhan

PART 1

[STEP 2] Adding a dedicated hadoop system user

check groups

$ compgen -g

talayhan

Why do compilers even bother with exploiting undefinedness signed overflow? And what are those
mysterious cases where it helps?

A lot of people (myself included) are against transforms that aggressively exploit undefined behavior, but
I think it's useful to know what compiler writers are accomplishing by this.

TL;DR: C doesn't work very well if int!=register width, but (for backwards compat) int is 32-bit on all
major 64-bit targets, and this causes quite hairy problems for code generation and optimization in some
fairly common cases. The signed overflow UB exploitation is an attempt to work around this.

talayhan

#!/usr/bin/env bash


# add repository for g++-5
sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test

# add repository for clang-3.7
sudo add-apt-repository -y "deb http://llvm.org/apt/trusty/ llvm-toolchain-trusty-3.7 main"
wget --quiet -O - http://llvm.org/apt/llvm-snapshot.gpg.key | sudo apt-key add -

talayhan

1. Clone your fork:

git clone [email protected]:YOUR-USERNAME/YOUR-FORKED-REPO.git

2. Add remote from original repository in your forked repository:

cd into/cloned/fork-repo
git remote add upstream git://github.com/ORIGINAL-DEV-USERNAME/REPO-YOU-FORKED-FROM.git
git fetch upstream

talayhan

Rich Hickey on becoming a better developer

Rich Hickey • 3 years ago

Sorry, I have to disagree with the entire premise here.

A wide variety of experiences might lead to well-roundedness, but not to greatness, nor even goodness. By constantly switching from one thing to another you are always reaching above your comfort zone, yes, but doing so by resetting your skill and knowledge level to zero.

Mastery comes from a combination of at least several of the following:

talayhan

Linux NetFilter, IP Tables and Conntrack Diagrams

IPTABLES TABLES and CHAINS

IPTables has the following 4 built-in tables.

1) Filter Table

Filter is default table for iptables. So, if you don’t define you own table, you’ll be using filter table. Iptables’s filter table has the following built-in chains.

talayhan

#!/usr/bin/env python

"""Simple HTTP Server With Upload.

This module builds on BaseHTTPServer by implementing the standard GET
and HEAD requests in a fairly straightforward manner.

"""

talayhan

Import existing Git repository into another

Folder structure before (2 separate repositories):

XXX
 |- .git
 |- (project files)
YYY
 |- .git

talayhan

#!/bin/sh
# date: 02-17-2020
# =================
# System info
# =================
# $ cat /etc/issue : Manjaro Linux \r  (\n) (\l)
# $ uname -a       : Linux t490 5.4.18-1-MANJARO #1 SMP PREEMPT Thu Feb 6 11:41:30 UTC 2020 x86_64 GNU/Linux

#install wine - my current version: wine-5.0
sudo pacman -S wine

talayhan

git filter-branch -f --commit-filter '
        if [ "$GIT_AUTHOR_EMAIL" = "[email protected]" -o  "$GIT_AUTHOR_EMAIL" = "[email protected]" ];
        then
                GIT_AUTHOR_NAME="User Name";
                GIT_AUTHOR_EMAIL="[email protected]";
                git commit-tree "$@";
        else
                git commit-tree "$@";
        fi' HEAD