haridsv

What exactly is "iowait"?

To summarize it in one sentence, 'iowait' is the percentage
of time the CPU is idle AND there is at least one I/O
in progress.

Each CPU can be in one of four states: user, sys, idle, iowait.
Performance tools such as vmstat, iostat, sar, etc. print
out these four states as a percentage.  The sar tool can
print out the states on a per CPU basis (-P flag) but most

karmi

nginx/
!nginx/.gitkeep
!nginx/logs/.gitkeep

src/

tmp/

hgenru

from tornado.web import RequestHandler


class HelloHandler(RequestHandler):
    def get(self):
        self.write('Hello world!')

morhekil

http {
  log_format bodylog '$remote_addr - $remote_user [$time_local] '
      '"$request" $status $body_bytes_sent '
      '"$http_referer" "$http_user_agent" $request_time '
      '<"$request_body" >"$resp_body"';

  lua_need_request_body on;

  set $resp_body "";
  body_filter_by_lua '

bsweger

Useful Pandas Snippets

A personal diary of DataFrame munging over the years.

Data Types and Conversion

Convert Series datatype to numeric (will error if column has non-numeric values)
(h/t @makmanalp)

sergiotapia

import (
    "crypto/md5"
    "encoding/hex"
)

func GetMD5Hash(text string) string {
    hasher := md5.New()
    hasher.Write([]byte(text))
    return hex.EncodeToString(hasher.Sum(nil))
}

grenade

# Sane settings for Gnome
gsettings set org.gnome.desktop.background show-desktop-icons true
gsettings set org.gnome.desktop.interface clock-show-date true
gsettings set org.gnome.settings-daemon.plugins.xsettings antialiasing 'grayscale'
gsettings set org.gnome.settings-daemon.plugins.xsettings hinting 'slight'
gsettings set org.gnome.desktop.interface text-scaling-factor '1.0'
gsettings set org.gnome.desktop.interface monospace-font-name "Monospace 10"
gsettings set org.gnome.desktop.interface document-font-name 'Sans 10'
gsettings set org.gnome.desktop.interface font-name 'Cantarell 10'
gsettings set org.gnome.desktop.interface gtk-theme 'Adwaita'

ssstonebraker

FILE SPACING:

 # double space a file
 sed G

 # double space a file which already has blank lines in it. Output file
 # should contain no more than one blank line between lines of text.
 sed '/^$/d;G'

yonjah

TL;DR - jump to the challenge at the end

====ON BLOCKING EVIL BOTS=====
On a resent job interview I had for "Incapsula" a few days ago I was put to the challenge to break
their bot protection mechanism. Apparently node.js is not that common among bot writes and most bots
are not able to run javascript.
The challenge had two parts -
1. find what the code does.
2. implement a bot that will break the code without using js.
3. think how to make this code unbreakable

NV

// phantomjs --web-security=no most_used_css_property_names.js

var urls = [
    'http://google.com',
    'http://facebook.com',
    'http://youtube.com',
    'http://yahoo.com',
    'https://github.com/',
    'http://twitter.com/',
    'http://en.wikipedia.org/wiki/Main_Page',