gabesullice

A few days ago, I mentioned to Rob Ballou, that there's just something very satisfying about shell scripting. Once you've groked all its little idiosyncracies, it's really quite addictive. As developers, I think we all get some gratification from getting things done, but also from building elegant, complete systems. For me, shell scripting really scratches all those itches. I get to build a system from start to finish, completely self-contained and solve a real problem.

Elegant, complete systems might at first seem antithetical to what most people think of shell scripting. Shell scripting is plagued by weird quoting, strange unfamiliar constructions, and a lack useful data types. However, once you embrace the things that shell scripting is good at and learn a few strategies for writing scripts tidily, it can become a fantastic tool for solving real, every day problems.

So, what are those strategies and what are things that the shell does well?

The Last Template You'll Ever Need

#!/bin/bash

jolestar

PASSWORD=$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 16 | head -n 1)
apt-get update
apt-get install apt-transport-https ca-certificates
apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
apt-get install linux-image-extra-$(uname -r) linux-image-extra-virtual
echo "deb https://apt.dockerproject.org/repo ubuntu-xenial main" | sudo tee /etc/apt/sources.list.d/docker.list
apt-get update
apt-get install -y docker-engine
service docker start

oliveratgithub

<!-- Example #1 - no styling -->
Made with ❤ in Switzerland
Made with ♥ in Switzerland
Made with ♡ in Switzerland
Made with ❤️ in Switzerland
Made with ♥️ in Switzerland

<!-- Example #2 - inline-styled ❤ -->
Made with <span style="color: #e25555;">&#9829;</span> in Switzerland
Made with <span style="color: #e25555;">&hearts;</span> in Switzerland

gengue

# -*- coding: utf-8 -*-
from __future__ import absolute_import, unicode_literals

from rest_framework import serializers
from .models import User


class UserSerializer(serializers.ModelSerializer):
    """
    User accounts serializer

tralston

After updating pg_hba.conf or postgresql.conf, the server needs the config needs to be reloaded. The easiest way to do this is by restarting the postgres service:

service postgresql restart

When the service command is not available (no upstart on Synology NAS, for example), there are some more creative ways to reload the config. Note this first one needs to be done under the user that runs postgres (usually the user=postgres).

user#  sudo su postgres
postgres#  pg_ctl reload

yxy

import unicodecsv
from django.http import HttpResponse

def export_as_csv_action(description="Export selected objects as CSV file",
                         fields=None, exclude=None, header=True):
    """
    This function returns an export csv action
    'fields' and 'exclude' work like in django ModelForm
    'header' is whether or not to output the column names as the first row
    """

Geoyi

How to install virtualenv:

Install pip first

sudo apt-get install python3-pip

Then install virtualenv using pip3

sudo pip3 install virtualenv 

althonos

# https://gist.github.com/althonos/6914b896789d3f2078d1e6237642c35c

[metadata]
name = {name}
version = file: {name}/_version.txt
author = Martin Larralde
author_email = [email protected]
url = https://github.com/althonos/{name}
description = {description}
long_description = file: README.md

trongthanh

<!-- Instructions:
- Download and unzip Mojave dynamic background here: https://files.rb.gd/mojave_dynamic.zip 
- Rename the extracted folder as "mojave-background" (Excuse the trouble but I renamed it on my machine and already use that path in the XML file)
- Save this xml file next to the Mojave background files
- Fix the path to the background images below (better using absolute path)
- Lastly, either: 
  + GNOME: Use gnome-tweaks tool to select this XML as wallpaper (as default wallpaper settings won't let you choose wallpaper from custom path)
  + MATE: Go to background setting (in Appearance) > Choose +Add... > make sure **All files** filter is selected at the bottom right > Then choose mojave.xml
-->
<background>

bradtraversy

Django 2.x Cheat Sheet

Creating a virtual environment

We need to create a virtual env for our app to run in: More Here Run this command in whatever folder you want to create your venv folder

python -m venv ./venv