jsleetw

date -s "$(wget --no-cache -S -O /dev/null google.com 2>&1 | sed -n -e '/  *Date: */ {' -e s///p -e q -e '}')"

shantanuo

#!/bin/sh
TABLE_SCHEMA=$1
TABLE_NAME=$2

mytime=`date '+%y%m%d%H%M'`
hostname=`hostname | tr 'A-Z' 'a-z'`
file_prefix="trimax$TABLE_NAME$mytime$TABLE_SCHEMA"
bucket_name=$file_prefix
splitat="4000000000"
bulkfiles=200

Sapphire64

[unix_http_server]
file=/tmp/supervisor.sock                       ; path to your socket file

[supervisord]
logfile=/var/log/supervisord/supervisord.log    ; supervisord log file
logfile_maxbytes=50MB                           ; maximum size of logfile before rotation
logfile_backups=10                              ; number of backed up logfiles
loglevel=error                                  ; info, debug, warn, trace
pidfile=/var/run/supervisord.pid                ; pidfile location
nodaemon=false                                  ; run supervisord as a daemon

amitsaha

How does ls work?

I wanted to be really able to explain to a fair amount of detail how does the program :command:`ls` actually work right from the moment you type the command name and hit ENTER. What goes on in user space and and in kernel space? This is my attempt and what I have learned so far on Linux (Fedora 19, 3.x kernel).

How does the shell find the location of 'ls' ?

denji

Moved to git repository: https://github.com/denji/nginx-tuning

NGINX Tuning For Best Performance

For this configuration you can use web server you like, i decided, because i work mostly with it to use nginx.

Generally, properly configured nginx can handle up to 400K to 500K requests per second (clustered), most what i saw is 50K to 80K (non-clustered) requests per second and 30% CPU load, course, this was 2 x Intel Xeon with HyperThreading enabled, but it can work without problem on slower machines.

You must understand that this config is used in testing environment and not in production so you will need to find a way to implement most of those features best possible for your servers.

morhekil

#!/bin/bash

# Rsync based file backup script, with hard-linking enabled.
#
# Runtime options:
# -n - dry-run; do nothing, just display what is going to happen on a real run
# -v - verbose output; print out what is being backed up
#

# set to your rsync location

josue

server {
	listen 80;
	listen 443 default_server ssl;

	ssl on;
	ssl_certificate /etc/ssl/certs/myssl.crt;
	ssl_certificate_key /etc/ssl/private/myssl.key;

	server_name *.example.com;
	root /var/www/vhosts/website;

jasonkeene

Python for System Admins / Operators

Installing Python

Most Unix/Linux systems come with python pre-installed:

$ python -V

aloysius-lim

import argparse
import json
import time

import boto.ec2


# Set up argument parser
parser = argparse.ArgumentParser(
    description='Request AWS EC2 spot instance and tag instance and volumes.',

gene1wood

#!/usr/bin/env python

import boto, boto.jsonresponse
conn = boto.connect_sts()
e = boto.jsonresponse.Element()
boto.jsonresponse.XmlHandler(e, conn).parse(conn.make_request('GetCallerIdentity',{},'/','POST').read())
e['GetCallerIdentityResponse']['GetCallerIdentityResult']['Account']