rbranson

Desk Gear

Updated 2021-03-01

• Steelcase AirTouch Sit-Stand Desk
• Herman Miller Aeron Type C Chair
• Ergotron LX Monitor Arm
• 13" 2020 MacBook Pro
• Dell U4320Q UltraSharp 43" 4K USB-C Monitor
• Keychron K2 Keyboard with Blue Switches

fnky

ANSI Escape Sequences

Standard escape codes are prefixed with Escape:

• Ctrl-Key: ^[
• Octal: \033
• Unicode: \u001b
• Hexadecimal: \x1B
• Decimal: 27

mordr

Set KUBE_EDITOR to Visual Studio Code, assumes 'code' is in PATH

export KUBE_EDITOR='code --wait'

Running k edit ... will open up the yaml using Visual Studio Code.

fntlnz

Create Root CA (Done once)

Create Root Key

Attention: this is the key used to sign the certificate requests, anyone holding this can sign certificates on your behalf. So keep it in a safe place!

openssl genrsa -des3 -out rootCA.key 4096

hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs