Tristor

#!/bin/bash
# Flushing all rules
iptables -F FORWARD
iptables -F INPUT
iptables -F OUTPUT
iptables -X
# Setting default filter policy
iptables -P INPUT DROP
iptables -P OUTPUT DROP
iptables -P FORWARD DROP

joewiz

On Tue Oct 27, 2015, history.state.gov began buckling under load, intermittently issuing 500 errors. Nginx's error log was sprinkled with the following errors:

2015/10/27 21:48:36 [crit] 2475#0: accept4() failed (24: Too many open files)

2015/10/27 21:48:36 [alert] 2475#0: *7163915 socket() failed (24: Too many open files) while connecting to upstream...

An article at http://www.cyberciti.biz/faq/linux-unix-nginx-too-many-open-files/ provided directions that mostly worked. Below are the steps we followed. The steps that diverged from the article's directions are marked with an *.

1. * Instead of using su to run ulimit on the nginx account, use ps aux | grep nginx to locate nginx's process IDs. Then query each process's file handle limits using cat /proc/pid/limits (where pid is the process id retrieved from ps). (Note: sudo may be necessary on your system for the cat command here, depending on your system.)
2. Added fs.file-max = 70000 to /etc/sysctl.conf

espinchi

import android.os.Build;

/**
 * Utility methods related to physical devies and emulators.
 */
public class DeviceUtil {

    public static boolean isEmulator() {
        return Build.FINGERPRINT.startsWith("generic")
                || Build.FINGERPRINT.startsWith("unknown")

ygotthilf

ssh-keygen -t rsa -b 4096 -m PEM -f jwtRS256.key
# Don't add passphrase
openssl rsa -in jwtRS256.key -pubout -outform PEM -out jwtRS256.key.pub
cat jwtRS256.key
cat jwtRS256.key.pub

hhcordero

Dockerized JMeter - A Distributed Load Testing Workflow

Supported Cloud Providers:

• Amazon (https://aws.amazon.com/free/)
• DigitalOcean (https://www.digitalocean.com/join/)

Images used:

• JMeter Server (https://hub.docker.com/r/hhcordero/docker-jmeter-server) aka "Slave"
• JMeter Client Non-gui (https://hub.docker.com/r/hhcordero/docker-jmeter-client) aka "Master"

friek

# Ctrl+W to delete the previous word
bind "^W" ed-delete-prev-word
# Ctrl+U to delete the current line contents
bind "^U" vi-kill-line-prev
# Ctrl+R to search the query history
bind "^R" em-inc-search-prev
# Ctrl+Left Arrow to go the previous word
bind "\e[1;5D" vi-prev-word
# Ctrl+Right Arrow to go to the next word
bind "\e[1;5C" vi-next-word

PaulFurtado

"""
    Example code for resetting the USB port that a Teensy microcontroller is
    attached to. There are a lot of situations where a Teensy or Arduino can
    end up in a bad state and need resetting, this code is useful for 
"""

import os
import fcntl
import subprocess

thinkchip

#
#Example of how to use EasyMDB RS232
#Date June/2014
#Version 1.0.2
#Not warranty, for educational purposes
#Thinkchip

#V1.0.1
#dispense coin function
#Level coin changer added

LeCoupa

/* *******************************************************************************************
 * THE UPDATED VERSION IS AVAILABLE AT
 * https://github.com/LeCoupa/awesome-cheatsheets
 * ******************************************************************************************* */


// 0. Synopsis.
// http://nodejs.org/api/synopsis.html

thinkchip

#
#Example of how to use EasyMDB RS232
#Date June/2014
#Version 1.0
#Braulio Chi Salavarria
#Not warranty, for educational purposes
#Thinkchip

import serial
import time