josephernest

# From "A simple unix/linux daemon in Python" by Sander Marechal 
# See http://stackoverflow.com/a/473702/1422096 and http://web.archive.org/web/20131017130434/http://www.jejik.com/articles/2007/02/a_simple_unix_linux_daemon_in_python/
#
# Modified to add quit() that allows to run some code before closing the daemon
# See http://stackoverflow.com/a/40423758/1422096
#
# Modified for Python 3 (see also: http://web.archive.org/web/20131017130434/http://www.jejik.com/files/examples/daemon3x.py)
#
# Joseph Ernest, 20200507_1220

josnidhin

---
- name: Terminate EC2 instances
  hosts: localhost
  connection: local
  gather_facts: no
  
  vars:
    aws_region: "eu-west-1"
    ec2_tags:
      Name: "Test Server"

Faheetah

node {
    echo 'Results included as an inline comment exactly how they are returned as of Jenkins 2.121, with $BUILD_NUMBER = 1'
    echo 'No quotes, pipeline command in single quotes'
    sh 'echo $BUILD_NUMBER' // 1
    echo 'Double quotes are silently dropped'
    sh 'echo "$BUILD_NUMBER"' // 1
    echo 'Even escaped with a single backslash they are dropped'
    sh 'echo \"$BUILD_NUMBER\"' // 1
    echo 'Using two backslashes, the quotes are preserved'
    sh 'echo \\"$BUILD_NUMBER\\"' // "1"

valyala

Optimizing postgresql table for more than 100K inserts per second

• Create UNLOGGED table. This reduces the amount of data written to persistent storage by up to 2x.
• Set WITH (autovacuum_enabled=false) on the table. This saves CPU time and IO bandwidth on useless vacuuming of the table (since we never DELETE or UPDATE the table).
• Insert rows with COPY FROM STDIN. This is the fastest possible approach to insert rows into table.
• Minimize the number of indexes in the table, since they slow down inserts. Usually an index on time timestamp with time zone is enough.
• Add synchronous_commit = off to postgresql.conf.
• Use table inheritance for fast removal of old data:

xiongchiamiov

function decode-authorization-failure-message {
    if [ $# -ne 1 ] || [ "$1" = -h ] || [ "$1" = --help ]; then
        cat <<'EOT'
Usage: decode-authorization-failure-message <message>

Use this when Amazon gives you an "Encoded authorization failure message" and
you need to turn it into something readable.
EOT
        return 1
    fi

bastman

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

irvingpop

# replaces this file /opt/vagrant/embedded/gems/gems/vagrant-1.7.4/plugins/providers/virtualbox/action/sane_defaults.rb
# NOTE: if using a different Vagrant version, adjust the version field accordingly
# NOTE2: only the sections with the IRVING comment have been changed from the default

require "log4r"

module VagrantPlugins
  module ProviderVirtualBox
    module Action
      class SaneDefaults

daks

#!/bin/bash
# This file must be executable to work! chmod 755!
#
# The LUKS key must exist as a file at /etc/.keys/${device}.key
# Protect this directory: root as user/group, 400 as permissions
#
# Edit your autofs master file to include something like
# /mnt/crypt    /etc/auto.luks    --timeout=600
#
# Then you can access your LUKS encrypted disk with

moiseevigor

xstat() {
  for target in "${@}"; do
    inode=$(ls -di "${target}" | cut -d ' ' -f 1)
    fs=$(df "${target}"  | tail -1 | awk '{print $1}')
    crtime=$(sudo debugfs -R 'stat <'"${inode}"'>' "${fs}" 2>/dev/null | 
    grep -oP 'crtime.*--\s*\K.*')
    printf "%s\t%s\n" "${crtime}" "${target}"
  done
}

mariussturm

#!/bin/bash

sleep 3

IP_ADDRESS=$(hostname  -I | cut -f1 -d' ')
GRAYLOG2_URL="http://admin:admin@${IP_ADDRESS}:12900"

GRAYLOG2_INPUT_GELF_TCP='
{
      "global": "true",