innyso

To make the left control key also an escape

1. install Karabiner
2. Search for complex_modifications rules, find somethin glike Change control key
3. Impact and Enable

innyso

Reset bluetooth hhkb pairing

- go into system preference > keyboard > setup bluetooth keyboard
- press Fn+q to get into pairing mode (blue light start flashing)
- Fn+crtl then 1 to reset first pairing

innyso

Difference between grep with and without extended-regex

• by default grep interpret search pattern as basic regular expression i.e. the meta-characters ?, +, |, ( and ) are interpreted as literal, hence need to escape with backslash
• can pass in extended regular expresson option -E (or --extended-regex) which means it doesn't take the meta-characters literally hence do not need to escape with backslash

Anchoring

# a line begins with hello
grep '^hello' world.txt 

innyso

Setting up aws cli with assume role

Let's say we have a tools account that we login and assume role with

1. Run aws configure --profile tools and follow the prompt to setup initial aws related configuration files

2. Open ~/.aws/config and add the following

[profile tools]

innyso

Display color when using watch

watch --color -n 2 <command>

innyso

Moving and renaming a resource out of terraform state file

One of my rule of thumb is never touch terraform state file if I want to live a happy life but recently I found myself having to separate a state file into 2. At first I was very irritated because I should've done this in the beginning but what happened, happened so lets deal with it.

With some quick online searching, to my surprised there are some terraform built-in command that can make my life easier.

Let says all the current terraform code are in foo/ and I would like to move module.bar out of foo/ to bar/ and also rename the module to module.balloon

Let's get an understand what we currently have

innyso

Default value in bash

# Set COFFEE to latte if there is no input 
COFFEE=${1:-latte} 

# Set SIZE to small when ORDER is not set or null
SIZE=${ORDER:-small}

# Set TOPPING and EXTRA to chocolate when EXTRA is not set or null

innyso

How does Ultisnips know which snippet file(s) to load?

In the snippet definition directories, it look for the following patterns:

foo. snippets
foo_*.snippets
foo/*

where foo is the filetype

innyso

Linux foreground background process

Foreground Process

A command or process you run directly and wait for it to complete

Background Process

The shell does not need to wait for the process to end. You can run as many of background process as you want within your system memory limit.

innyso

Recently I need to do some updating for an nginx configuration, beside the fact that I am a bit rusty with my nginx config skills, I also encounter something like this

location @something {
  # ...
}

Not knowing what this mean, did some quick search and found that this is called a named location and it seems like a good alternative to if-then-else in certain scenario.