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@carlesloriente
carlesloriente / compile-and-install-glibc_2.18-centos-7.sh
Last active April 22, 2024 03:17
Compile and install GLIBC 2.18 in CentOS 7
# Check gist comments to verify system PATH and or adapt it.
wget https://ftp.gnu.org/gnu/glibc/glibc-2.18.tar.gz
tar zxvf glibc-2.18.tar.gz
cd glibc-2.18
mkdir build
cd build
../configure --prefix=/opt/glibc-2.18
make -j4
sudo make install
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/opt/glibc-2.18/lib
@DavidKuennen
DavidKuennen / minimal-analytics-snippet.js
Last active June 9, 2024 19:08
Minimal Analytics Snippet
(function (context, trackingId, options) {
const history = context.history;
const doc = document;
const nav = navigator || {};
const storage = localStorage;
const encode = encodeURIComponent;
const pushState = history.pushState;
const typeException = 'exception';
const generateId = () => Math.random().toString(36);
const getId = () => {
@brendangregg
brendangregg / dockerpsns.sh
Last active August 23, 2023 10:11
docker ps --namespaces
#!/bin/bash
#
# dockerpsns - proof of concept for a "docker ps --namespaces".
#
# USAGE: ./dockerpsns.sh
#
# This lists containers, their init PIDs, and namespace IDs. If container
# namespaces equal the host namespace, they are colored red (this can be
# disabled by setting color=0 below).
#
@bitoiu
bitoiu / self-signed-wildcard-cert-for-ghes.md
Last active September 19, 2023 09:37
Self-Signed Wildcard certificate with SAN using openssl / SSL

Copy the default template of openssl.cnf to a writable location.

cp /System/Library/OpenSSL/openssl.cnf src

Uncomment the req_extensions = v3_req

req_extensions = v3_req # The extensions to add to a certificate request

Add subjectAltName to v3_req section

@Alexey-N-Chernyshov
Alexey-N-Chernyshov / client.c
Last active June 6, 2024 11:43
Example of client/server with select().
// Simple example of client.
// Client prints received messages to stdout and sends from stdin.
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <signal.h>
#include <unistd.h>
#include <sys/select.h>
#include <netinet/in.h>
@dynajoe
dynajoe / Program.cs
Created November 1, 2012 16:06
Example C# HTTP Server
using System;
using System.Net;
using System.Text;
using System.Threading;
namespace ExampleSimpleWebserver
{
class Program
{
static void Main (string[] args)
@jboner
jboner / latency.txt
Last active July 6, 2024 18:55
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers (~2012)
----------------------------------
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