HariSekhon

Code is clean if it can be understood easily – by everyone on the team. Clean code can be read and enhanced by a developer other than its original author. With understandability comes readability, changeability, extensibility and maintainability.

---

General rules

1. Follow standard conventions.
2. Keep it simple stupid. Simpler is always better. Reduce complexity as much as possible.
3. Boy scout rule. Leave the campground cleaner than you found it.
4. Always find root cause. Always look for the root cause of a problem.

Design rules

HariSekhon

Simple collection of Groovy scripts to help me maintain some Jenkins systems.

See also https://wiki.jenkins-ci.org/display/JENKINS/Jenkins+Script+Console

Please comment & let me know if you have a fork / fixes you'd like to include.

HariSekhon

#!/usr/bin/env bash

# TODO: Need to figure out the settings for the following:
#    1) Dock: Items with order (not capturing binary data - since that is dependent on installed apps)
#    2) Security & Privacy Preferences: Full Disk Access, Camera, Microphone
#    3) Login items for my user (i.e. apps started when I login)
#    4) Retina displays

##
# This is a script with useful tips taken from:

HariSekhon

Table of Contents

• 0.1. References
  • 0.2. Other cheatsheets
  • 0.3. Manage multiple gcloud config configurations
    • 0.3.1. Switch gcloud context with gcloud config
  • 0.4. Auth
• 0.5. info

HariSekhon

Command:

curl https://git.io/ -i -F "url=https://github.com/YOUR_GITHUB_URL" -F "code=YOUR_CUSTOM_NAME"

URLs that can be created is from:

• https://github.com/*
• https://*.github.com
• https://*.github.com/*
• https://*.github.io

HariSekhon

Command:

curl https://git.io/ -i -F "url=https://github.com/YOUR_GITHUB_URL" -F "code=YOUR_CUSTOM_NAME"

URLs that can be created is from:

• https://github.com/*
• https://*.github.com
• https://*.github.com/*
• https://*.github.io

HariSekhon

#!/bin/bash
# bash generate random alphanumeric string
#

# bash generate random 32 character alphanumeric string (upper and lowercase) and 
NEW_UUID=$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 32 | head -n 1)

# bash generate random 32 character alphanumeric string (lowercase only)
cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 32 | head -n 1

HariSekhon

#!/usr/bin/env bash

apt_wait () {
  while sudo fuser /var/lib/dpkg/lock >/dev/null 2>&1 ; do
    sleep 1
  done
  while sudo fuser /var/lib/apt/lists/lock >/dev/null 2>&1 ; do
    sleep 1
  done
  if [ -f /var/log/unattended-upgrades/unattended-upgrades.log ]; then

HariSekhon

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

HariSekhon

--get running applications
http://seregion02.cloud.hortonworks.com:8088/ws/v1/cluster/apps?states=accepted,running

--get dag id for counters and callerId (hive session) for hive details
http://seregion02.cloud.hortonworks.com:8188/ws/v1/timeline/TEZ_DAG_ID?limit=1000&primaryFilter=applicationId%3Aapplication_1458195563211_0034

--get counters on the fly
http://seregion02.cloud.hortonworks.com:8088/proxy/application_1458195563211_0034/ws/v2/tez/verticesInfo?dagID=2&counters=org.apache.tez.common.counters.FileSystemCounter%2FHDFS_BYTES_WRITTEN%2CHDFS_BYTES_READ%3Borg.apache.tez.common.counters.TaskCounter%2FNUM_SPECULATIONS%2CREDUCE_INPUT_GROUPS
http://seregion02.cloud.hortonworks.com:8088/proxy/application_1458195563211_0034/ws/v2/tez/verticesInfo?dagID=3&counters=*