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@virtualstaticvoid
virtualstaticvoid / iptables_rules.sh
Created June 14, 2011 08:58
25 Most Frequently Used Linux IPTables Rules Examples
# Modify this file accordingly for your specific requirement.
# http://www.thegeekstuff.com
# 1. Delete all existing rules
iptables -F
# 2. Set default chain policies
iptables -P INPUT DROP
iptables -P FORWARD DROP
iptables -P OUTPUT DROP
@rgreenjr
rgreenjr / postgres_queries_and_commands.sql
Last active July 27, 2024 16:50
Useful PostgreSQL Queries and Commands
-- show running queries (pre 9.2)
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query
FROM pg_stat_activity
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%'
ORDER BY query_start desc;
-- show running queries (9.2)
SELECT pid, age(clock_timestamp(), query_start), usename, query
FROM pg_stat_activity
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%'
; ___ _ __ ___ __ ___
; / __|_ _ __ _| |_____ / /| __|/ \_ )
; \__ \ ' \/ _` | / / -_) _ \__ \ () / /
; |___/_||_\__,_|_\_\___\___/___/\__/___|
; An annotated version of the snake example from Nick Morgan's 6502 assembly tutorial
; on http://skilldrick.github.io/easy6502/ that I created as an exercise for myself
; to learn a little bit about assembly. I **think** I understood everything, but I may
; also be completely wrong :-)
@marcanuy
marcanuy / apache_error_log_parser.sh
Last active April 1, 2024 15:25
Apache error log list ordered by most common errors
#!/bin/bash
sed 's^\[.*\]^^g' error.log | sed 's^\, referer: [^\n]*^^g' | sort | uniq -c | sort -n
@h4cc
h4cc / array_filter_key.php
Created October 6, 2014 12:29
Filtering a PHP array by key instead of value.
<?php
/**
* Filtering a array by its keys using a callback.
*
* @param $array array The array to filter
* @param $callback Callback The filter callback, that will get the key as first argument.
*
* @return array The remaining key => value combinations from $array.
*/
@cyfdecyf
cyfdecyf / Makefile
Created September 11, 2015 01:53
Test get and set pipe/fifo buffer size.
pipe-size: pipe-size.o
$(CC) $< -o $@
@jfpuget
jfpuget / Julia_Python_perf.ipynb
Last active April 15, 2022 11:55
An exercise in Python optimization: make Python benchmarks as fast, if not faster, than Julia.
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@Davor111
Davor111 / sshuttle.sh
Created February 17, 2017 08:34
How to use sshuttle with .key, .csr or .pem files for authentication
#It's not directly mentioned in the documentation on how to do this, so here you go. This command will tunnel everything including DNS:
sshuttle --dns -vr user@yourserver.com 0/0 --ssh-cmd 'ssh -i /your/key/path.pem'
@momota
momota / generate_L_size_csv.py
Last active March 28, 2024 14:27
Generate a large size of CSV file was filled random values. This script generates around 250MB size of the file. You can adjust two parameters `row` and `col` to generate the file which has desirable size.
import csv
import random
# 1000000 and 52 == roughly 1GB (WARNING TAKES a while, 30s+)
rows = 1000000
columns = 52
def generate_random_row(col):
a = []
l = [i]
@utdrmac
utdrmac / make_employees.py
Last active February 7, 2024 16:58
Multi-Threaded MySQL in Python
#!/usr/bin/python
import os, sys
import random
import time
import string
import mysql.connector
import threading
from mysql.connector import errorcode