MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

olih

Processing JSON using jq

jq is useful to slice, filter, map and transform structured json data.

Installing jq

On Mac OS

brew install jq

danieleggert

GPG and git on macOS

Setup

No need for homebrew or anything like that. Works with https://www.git-tower.com and the command line.

1. Install https://gpgtools.org -- I'd suggest to do a customized install and deselect GPGMail.
2. Create or import a key -- see below for https://keybase.io
3. Run gpg --list-secret-keys and look for sec, use the key ID for the next step
4. Configure git to use GPG -- replace the key with the one from gpg --list-secret-keys

ipbastola

Safest way to clean up boot partition - Ubuntu 14.04LTS-x64, Ubuntu 16.04LTS-x64

Reference

Case I: if /boot is not 100% full and apt is working

1. Check the current kernel version

$ uname -r 

mjpowersjr

The MySQL slow query log is a difficult format to extract information from. After looking at various examples with mixed results, I realized that it's much easier to configure MySQL to write the slow query log to a table in CSV format!

From the MySQL documentation:

By default, the log tables use the CSV storage engine that writes data in comma-separated values format. For users who have access to the .CSV files that contain log table data, the files are easy to import into other programs such as spreadsheets that can process CSV input.

my.cnf

Note: don't forget to open up permissions on your slow query log CSV file so logstash can read it!

# enable slow query log

dmytro

#!/bin/bash
# ssh-multi
# D.Kovalov
# Based on http://linuxpixies.blogspot.jp/2011/06/tmux-copy-mode-and-how-to-control.html

# a script to ssh multiple servers over multiple tmux panes


starttmux() {
    if [ -z "$HOSTS" ]; then

andrewodri

FROM debian:10-slim

RUN apt-get update -y && \
  apt-get install -y awscli curl gnupg && \
  apt-key adv --fetch-keys "https://nginx.org/keys/nginx_signing.key" && \
  echo "deb http://nginx.org/packages/debian buster nginx" > /etc/apt/sources.list.d/nginx.list

RUN curl --silent --show-error --location --output /tmp/amazon-ssm-agent.deb "https://s3.us-east-1.amazonaws.com/amazon-ssm-us-east-1/latest/debian_amd64/amazon-ssm-agent.deb" && \
  dpkg -i /tmp/amazon-ssm-agent.deb

ulitiy

#include <Servo.h>

Servo myservo;

const int servoPin = 9;
const int buttonPin = 12;
const int ledPin = 13;

void setup() {
  myservo.attach(servoPin);

h0tw1r3

$ git clone -b 1.22 https://github.com/crosstool-ng/crosstool-ng.git
$ cd crosstool-ng
$ ./bootstrap
$ ./configure --prefix=/usr/local
$ make
$ sudo make install
$ cd ..
$ mkdir ctng
$ cd rpi1
$ ct-ng menuconfig

stevenkuhn

#
# Assumptions
#
# 1. If you have a Octopus release deployed, say 1.0.0.73, there is a git
#    tag set for that commit in GitHub that is "v1.0.0.73".
#
# 2. You have TeamCity label each successful build in GitHub with the format
#    "v{build number}. Sidenote: it appears that TeamCity only labels the
#    default branch, but not feature branches.
#