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npodonnell / bitcoind_ubuntu_setup.md
Last active April 23, 2024 18:56
Bitcoind Ubuntu Setup

Bitcoind Ubuntu Setup

N. P. O'Donnell, 2021

Getting Bitcoind

ARCH=x86_64
BITCOIN_VERSION=0.21.0
wget https://bitcoin.org/bin/bitcoin-core-$BITCOIN_VERSION/bitcoin-$BITCOIN_VERSION-$ARCH-linux-gnu.tar.gz
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npodonnell / special_characters.md
Last active January 17, 2024 07:35
Special Characters

Special Characters

N. P. O'Donnell, 2023

Typing These Characters

On Linux, Hold ctrl + shift + u at the same time, release all 3, then type the 4 hex characters of the character you'd like.

Codes

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npodonnell / mongodb_cheatsheet.md
Last active January 8, 2024 16:39
MongoDB Cheatsheet

MongoDB Cheatsheet

N. P. O'Donnell, 2021

Installing Community Edition (Ubuntu)

Check for latest version here

Add MongoDB repository to Apt and install:

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npodonnell / crypto_number_theory.py
Last active July 25, 2023 12:42
Crypto Number Theory
#!/usr/bin/env python3
#
# Crypto & Number Theory
# N. P. O'Donnell, 2020
def odd(a):
"""
Is a odd?
"""
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npodonnell / luks_encryption_cheatsheet.md
Last active March 13, 2023 16:26
LUKS Encryption Cheatsheet

LUKS Encryption Cheatsheet

N. P. O'Donnell, 2021

Before you do anything, ensure you have cryptsetup installed:

sudo apt-get install -y cryptsetup
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npodonnell / uniswap_v3_formulae.tex.md
Last active February 7, 2023 16:02
Uniswap v3 Formulae

Uniswap Formulae

Notes:

  • Lower-case x and y denote virtual or v1 reserves, upper-case X and Y denote v3 real reserves.
  • The v3 formulae have been adapted from those in the whitepaper to be in terms of price, not square-root-price.

v1/v2 Formulae

Constant Product Formula

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npodonnell / rust-crash-course.md
Last active January 19, 2023 11:06
Rust Crash Course

Rust Crash Course

N. P. O'Donnell, 2020 - 2023

Commands

rustup (Rust updater)

Show rustup version (not Rust version):




  


  




    


          
    

      

        
        

          

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                npodonnell
                / virtualization_notes.md
            
            

              Last active
              January 13, 2023 11:25
            

              
                Virtualization Notes
              
          

        

      

        

  

      

    
Virtualization Notes


N. P. O'Donnell, 2021


Find out if your x86 CPU supports KVM Virtualization


egrep -c '(vmx|svm)' /proc/cpuinfo



  


  




    


          
    

      

        
        

          

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                npodonnell
                / html-template-with-header-footer.html
            
            

              Last active
              December 31, 2022 21:30
            

          

        

      

        

  



    


          
    

      

        
        

          

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                npodonnell
                / ssh_cheatsheet.md
            
            

              Last active
              December 14, 2022 23:34
            

              
                SSH Cheatsheet
              
          

        

      

        

  

      

    
SSH Cheatsheet


N. P. O'Donnell, 2020


Specify a Key


To have SSH use a specific key:


ssh -i <path/to/key> <remote host>