nkhine

# 1. redo last command but as root
sudo !!

# 2. open an editor to run a command
ctrl+x+e

# 3. create a super fast ram disk
mkdir -p /mnt/ram
mount -t tmpfs tmpfs /mnt/ram -o size=8192M

nkhine

```
echo ':golang:E::go::/usr/local/bin/gorun:OC' | sudo tee /proc/sys/fs/binfmt_misc/register
:golang:E::go::/usr/local/bin/gorun:OC
```

```
package main

import (
	"fmt"

nkhine

bash-4.4# ruby-build -v 1.8.7 /usr/local
Downloading ruby-1.8.7.tar.bz2...
-> https://cache.ruby-lang.org/pub/ruby/1.8/ruby-1.8.7.tar.bz2
/tmp/ruby-build.20190128170412.7047 /tmp/ruby-build
Installing ruby-1.8.7...

WARNING: ruby-1.8.7 is past its end of life and is now unsupported.
It no longer receives bug fixes or critical security updates.

/tmp/ruby-build.20190128170412.7047/ruby-1.8.7 /tmp/ruby-build.20190128170412.7047 /tmp/ruby-build

nkhine

Kubectl output options

Let's look at some basic kubectl output options.

Our intention is to list nodes (with their AWS InstanceId) and Pods (sorted by node).

We can start with:

kubectl get no

nkhine

Python 2.7.15rc1 (default, Apr 15 2018, 21:51:34) 
[GCC 7.3.0] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import pyexcel as p
>>> dict_list=[{'alfa':['001','2'], 'beta':['001','3'], 'gamma':['001','2']},
...     {'alfa':['002','6'], 'beta':['002','4'], 'omega':['002','7']}]
>>> 
>>> s = p.Sheet()
>>> for d in dict_list:
...     s.row += p.get_sheet(adict=d, transpose_after=True)

nkhine

MySQL wizardry
Posted on June 5, 2001
by Giuseppe_Maxia
“I called in the Wizard on a Friday evening. It was almost six p.m. and I was afraid he had already left for the day. Instead, he answered at the first ring. Wizards never go home early. He recognized me and asked how he could help. I told him. He listed patiently, without asking silly questions in between, and finally said ‘I think I could provide you with some useful tool. See you in half an hour’ and hung up.” 

Cross tabulations are statistical reports where you de-normalize your data and show results grouped by one field, having one column for each distinct value of a second field.

Basic problem definition. Starting from a list of values, we want to group them by field A and create a column for each distinct value of field B.

nkhine

jobs

jenkins_url + /api/json?tree=jobs[name,color]

builds

jenkins_url + /job/${job_name}/api/json?tree=builds[number,status,timestamp,id,result]

last build

nkhine

### No longer needed as of nginx-1.13.9-1.el7_4.ngx.x86_64.rpm from nginx.org
### it was compiled against OpenSSL 1.0.2 from CentoOS 7.4 so it supports ALPN (HTTP2 works)
### nginx-module-njs-1.13.9.0.1.15-1.el7_4.ngx.x86_64.rpm

yum -y groupinstall 'Development Tools'
yum -y install wget openssl-devel libxml2-devel libxslt-devel gd-devel perl-ExtUtils-Embed GeoIP-devel rpmdevtools

OPENSSL="openssl-1.0.2l"
NGINX_VERSION="1.13.9-1"
NJS_VERSION="1.13.9.0.1.15-1"

nkhine

AWS CLI Cheatsheet

http://docs.aws.amazon.com/IAM/latest/UserGuide/best-practices.html https://www.youtube.com/watch?v=_wiGpBQGCjU

Setup

nkhine

AWSTemplateFormatVersion: '2010-09-09'
Description: Cognito Stack
Parameters:
  AuthName:
    Type: String
    Description: Unique Auth Name for Cognito Resources

Resources:

  # Creates a role that allows Cognito to send SNS messages