robinsmidsrod

Add the following chunk to your existing ISC dhcpd.conf file.

if exists user-class and ( option user-class = "iPXE" ) {
    filename "http://boot.smidsrod.lan/boot.ipxe";
}
else {
    filename "undionly.kpxe";
}

(or see https://gist.github.com/4008017 for a more elaborate setup

MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

marktheunissen

This playbook has been removed as it is now very outdated.

kbarber

Renew Puppet CA cert.

Not the perfect idea, but should alleviate the need to resign every cert.

What you need from existing puppet ssl directory:
ca/ca_crt.pem
ca/ca_key.pem

Create an openssl.cnf:
[ca]

gregbuehler

users:
  - { username: user1, password: password }
  - { username: user2, password: password }
  - { username: user3, password: password }
  - { username: user4, password: password }

hofmannsven

Git

Global Settings

• Related Setup: https://gist.github.com/hofmannsven/6814278
• Related Pro Tips: https://ochronus.com/git-tips-from-the-trenches/
• Interactive Beginners Tutorial: http://try.github.io/
• Git Cheatsheet by GitHub: https://services.github.com/on-demand/downloads/github-git-cheat-sheet/

Reminder

Press minus + shift + s and return to chop/fold long lines!

bzerangue

Binding and Unbinding to Active Directory from Mac OS via Command Line

• Open the Terminal Application
• Type in sudo -i and type in your Mac Administrator account password. sudo gives you root level or administrator level privileges.

To View current Active Directory Settings

dsconfigad -show

To Unbind a Computer from an Active Directory Domain

mokagio

#!/bin/bash

# See http://apple.stackexchange.com/questions/107307/how-can-i-install-the-command-line-tools-completely-from-the-command-line

echo "Checking Xcode CLI tools"
# Only run if the tools are not installed yet
# To check that try to print the SDK path
xcode-select -p &> /dev/null
if [ $? -ne 0 ]; then
  echo "Xcode CLI tools not found. Installing them..."

ykarikos

Howto start using Letsencrypt with simp_le

What I had:

• A Debian server at "mydomain.fi"
• A self-signed certificate for Apache HTTPD, Postfix SMTPD and Dovecot IMAPD.

What I wanted:

• A Letsencrypt certificate for Apache, Postfix and Dovecot
• Simple tool for managing certificates that does need root privileges
• Automatic renewal

CMCDragonkai

Introspecting a file on ZFS

Derived from: http://www.c0t0d0s0.org/archives/7485-Find-out-in-depth-information-about-a-file-in-ZFS.html

Sometimes you need to acquire in-depth information about a file that isn't exposed by other commands like stat.

ZFS allows you to do this with zdb. However there's a confusing problem. If you're just trying to access a file on your root pool that doesn't have any nested datasets, you need use rpool/ instead of just rpool (assuming "rpool" is the name of your root pool).

Here's 3 examples of acquiring information on /filepath.