#How to print remainder of line using awk

eliminate the first X columns…

Here is your challenge you have a list of cronjobs and you want to just execute the scheduled backup command with its arguments for a test run.

Using one command line, how would you do it?

Here is a sample root cronjob and I want to run the first entry with its arguments as a test run:

# m h  dom mon dow   command
 0 16  *   *   * /data/share/home/geoffm/dev/utils/bak-it.sh -i /usr/local/etc/include.lst -e /usr/local/etc/exclude.lst -t /data/bak/`hostname` -s 7 >/dev/null 2>&1
  5 0  *   *   * /data/share/motion/arch-files.sh >/dev/null 2>&1
*/15 *  *   *   * /data/share/home/geoffm/grab-pic.sh >/dev/null 2>&1
####### below are WIP or OLD ########
# 16 6  *   *   * /usr/sbin/lynis -c --auditor "automated" --cronjob --quiet >/dev/null 2>&1
#*/5 *  *   *   * /usr/local/bin/watch-proc.sh -f /usr/local/etc/watch-proc.conf -n geoffm@localhost >/dev/null 2>&1
#*/5 * * * * /data/share/home/geoffm/ping-pong.sh "ping -c2 192.168.1.55" "ssh 192.168.1.1 reboot" >/dev/null
#  7 * * * /usr/local/sbin/postfix_report.sh &> /dev/null

Entering special characters into vim

I use vim as my editor. Despite this first sentence, this is not a beginning volley to an editor flame war. I will save that for another day.

Ever editor has its own unique features and vim definitely no stranger to that group. One feature I use quite a bit is what vim calls digraphs.

There are thousands of characters other than the standard keyboard character that can be displayed with vim. You may already know that you can use CTRL-v <enter> to force a linefeed into even a DOS filetype. Actually `CTRL-v ascii### will force special characters from a long list of choices.

But I prefer using CTRL-K followed by two semi-meaningful (slightly resembles the intended special character) to create any one of literally thousands of special characters.

… exploring git from the inside out …

###Preface

Apologies up front - this is long... very long, but there is food for the brain here. I will discuss git for personal use. Using it with many other contributors is an extension of the principle covered here. For simplicity, I am only going to discuss you working alone and only using a single "branch" of code for each project - again, for simplicity. Additionally we are going to examine the git "database" (stored as compressed SHA-1 named files/objects) as we go. We can gain a better understanding by reviewing the changes to the guts of your personal git repository. We will not cover branches, tags, or the git daemon in this discussion.

###Why git? (skip this if you are less than patient)

Many years ago I used backups of my projects or just documents, notes, etc. All worked well until it didn’t. If you make a mistake and back it up guess what,

Ansible - modifying /etc/sudoers

I have locked administrators out of using sudo with a simple typo.

With ansible you can lockup sudo on every machine with a single error. So I get pretty cautious with editing /etc/sudoers through any deployment application.

Here is a quick example of going overboard to protect your sudoers file when using ansible. This is in my $ANSIBLE_DIR/roles/common/tasks/main.yml file

- name: Copy sudoers for safety
  command: cp /etc/sudoers /etc/sudoers.tmp

- name: Create sudoers.bak
  command: cp /etc/sudoers /etc/sudoers.bak

- name: Ensure admin group is in sudoers with NOPASSWD
  lineinfile: "dest=/etc/sudoers.tmp state=present regexp='^%admin ' line='%admin ALL=(ALL) NOPASSWD: ALL' validate='visudo -cf %s'"
  register: sudoers_tmp_ok

- name: Copy sudoers.tmp to sudoers
  when: sudoers_tmp_ok|success
  command: cp /etc/sudoers.tmp /etc/sudoers

SSH

Debug with verbose output

$HOME/.ssh/config first and foremost - debug with -vvvv

• actually do it before you need to so you can see how it works

From Wikipedia (paraphrased):

Secure Shell, or SSH, is a cryptographic (encrypted) network protocol for initiating text-based shell sessions[clarification needed] on remote machines in a secure way.

…

In 1995, Tatu Ylönen, a researcher at Helsinki University of Technology, Finland, designed the first version of the protocol (now called SSH-1) prompted by a password-sniffing attack at his university network.

…

Javascript fade in and down

I wanted to change the header on the theme for my web site to display a slide down and in header.

The script needed to be a combination of two jquery animations.

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
    $('#fadeInDown')
    .css('display', "none")
    .slideDown(2000)
    .animate(
      { opacity: 1 },
      { queue: false, duration: 2300 }
      );
    });
</script>

First we load in the jquery code from google nut this a single point of failure. If there is network interruption jquery code is lost. But in my instance if the network is failing then my web site probably is too.