grahamhelton

#!/bin/bash
# Detect all subjects with nodes/proxy permissions

# Colors
NOCOLOR=$(tput sgr0)
RED=$(tput setaf 1)
GREEN=$(tput setaf 2)
YELLOW=$(tput setaf 3)
CYAN=$(tput setaf 6)
DIM=$(tput setaf 8)

matheusmota

Best setup for fail2ban for hosts with ssh and apache

Jails (monitored services):

- apache           - Blocks failed login attempts use the below jail
- apache-overflows - Blocks the remote host that is trying to request suspicious URLs, use the below jail 
- apache-noscript  - Block the remote host that is trying to search for scripts on the website to execute, use the below jail
- apache-badbots   - Block the remote host that is trying to request malicious bot, use below jail
- http-get-dos     - Stops DOS attack from remote host
- ssh              - Blocks failed login attempts on the SSH server

abelcallejo

Creating bootable Linux USB using Mac

CentOS, Ubuntu, Slackware, etc. Whatever Linux-based OS it is, you can create a bootable USB for it by using a Mac.

1. Prepare the .iso file

Download it, copy it, whatever it takes to prepare that Linux-based OS .iso file

2. Convert the .iso file into a .img.dmg

andreibosco

Fonte: http://brandon.invergo.net/news/2012-05-26-using-gnu-stow-to-manage-your-dotfiles.html?round=two

I accidentally stumbled upon something yesterday that I felt like sharing, which fell squarely into the "why the hell didn't I know about this before?" category. In this post, I'll describe how to manage the various configuration files in your GNU/Linux home directory (aka "dotfiles" like .bashrc) using GNU Stow.

The difficulty is that it would be helpful to manage one's configuration files with a version control system like Git, Mercurial or Bazaar, but many/most dotfiles reside at the top-level of your home directory, where it wouldn't be a good idea to initialize a VCS repository. Over time I've come across various programs which aim to manage this for you by keeping all the files in a subdirectory and then installing or linking them into their appropriate places. None of those programs ever really appealed to me. They would require a ton of dependencies (like Ruby and a ton of libraries for it) or t

jboner

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

cdown

urlencode() {
    # urlencode <string>

    old_lc_collate=$LC_COLLATE
    LC_COLLATE=C

    local length="${#1}"
    for (( i = 0; i < length; i++ )); do
        local c="${1:$i:1}"
        case $c in