MohamadAli debMan

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

-E: will describe the underlaying queries of the \ commands (cool for learning!)
-l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

Clarify and agree on the scope of the system

User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?

Common Options

-#, --progress-bar Make curl display a simple progress bar instead of the more informational standard meter.

-b, --cookie <name=data> Supply cookie with request. If no =, then specifies the cookie file to use (see -c).

-c, --cookie-jar <file name> File to save response cookies to.

Auto-backup your configuration files with Vim

Not using versioning on your configuration files and editing them with Vim?

Use Vim’s backup option to automatically keep a copy of past versions. To put in your ~/.vimrc:

"Turn on backup option
set backup

Electron apps

Slide deck frameworks supporting Markdown source

Usage

curl -sSL https://gist.githubusercontent.com/ttimasdf/ef739670ac5d627981c5695adf4c8f98/raw/autossh@host1 | \
  sudo tee /etc/default/autossh@example
curl -sSL https://gist.githubusercontent.com/ttimasdf/ef739670ac5d627981c5695adf4c8f98/raw/[email protected] | \
  sudo tee /etc/systemd/system/[email protected]

sudo useradd -g nogroup -s /bin/false -m tunnel
sudo -u tunnel mkdir -p ~tunnel/.ssh # and copy your private key here

	#!/bin/bash

	# this script is not written by me. Just using it and sharing it here.

	# export DBUS_SESSION_BUS_ADDRESS environment variable useful when the script is set as a cron job
	PID=$(pgrep gnome-session)
	export DBUS_SESSION_BUS_ADDRESS=$(grep -z DBUS_SESSION_BUS_ADDRESS /proc/$PID/environ\|cut -d= -f2-)


	# $bing is needed to form the fully qualified URL for

	Development Status :: 1 - Planning
	Development Status :: 2 - Pre-Alpha
	Development Status :: 3 - Alpha
	Development Status :: 4 - Beta
	Development Status :: 5 - Production/Stable
	Development Status :: 6 - Mature
	Development Status :: 7 - Inactive
	Environment :: Console
	Environment :: Console :: Curses
	Environment :: Console :: Framebuffer

	#!/bin/bash

	# This installs alacritty terminal on ubuntu (https://github.com/jwilm/alacritty)
	# You have to have rust/cargo installed for this to work

	# Install required tools
	sudo apt-get install -y cmake libfreetype6-dev libfontconfig1-dev xclip

	# Download, compile and install Alacritty
	git clone https://github.com/jwilm/alacritty