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Kodiak Firesmith kfiresmith

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kfiresmith / create_pie_chart.py
Created June 2, 2021 21:20
#!/usr/bin/python3
import pandas as pd
from matplotlib.pyplot import pie, axis, show
df = pd.read_csv('syntheticdata.csv')
# show the csv: print(df.head())
sums = df.groupby(df["category"])["capacity-tb"].sum()
axis('equal');
pie(sums, labels=sums.index, autopct='%.0f%%');
show()
@kfiresmith
kfiresmith / pypi-ufw-rules.sh
Last active November 30, 2021 14:09
A quick and dirty script to generate a large series of UFW rules based on IP ranges, formatted as Ansible variables for use with weareinteractive.ufw, also dumps out a set of bare UFW rules for manual application.
#!/bin/bash
#
# A simple script to generate Ansible role weareinteractive.ufw rules for Pypi.org CDN egress
# https://api.fastly.com/public-ip-list
#
# 2021-11-30 Kodiak Firesmith <kfiresmith@whoi.edu>
#
ruleset="23.235.32.0/20 43.249.72.0/22 103.244.50.0/24 103.245.222.0/23 103.245.224.0/24 104.156.80.0/20 140.248.64.0/18 140.248.128.0/17 146.75.0.0/17 151.101.0.0/16 157.52.64.0/18 167.82.0.0/17 167.82.128.0/20 167.82.160.0/20 167.82.224.0/20 172.111.64.0/18 185.31.16.0/22 199.27.72.0/21 199.232.0.0/16"
ports="80,443"
@kfiresmith
kfiresmith / systemd-network-wait-online.service.md
Last active October 27, 2023 15:14
Cause and resolution to failure of systemd-network-wait-online.service failure on boot.

Long startup times due to systemd-network-wait-online.service

Problem

TL;DR: Essentially because of some quirk with networkd, all interfaces get stuck in a '(configuring)' state forever unless you set an empty link-local address for at least the primary interface (but I set it for both).

Systemd-network-wait-online.service waits for at least one interface to be fully online, and won't consider an interface to be fully online if it's in '(configuring)' status when you run networkctl status some-iface.

Solution

Set link-local: [] to be set on every interface:




  


  




    


          
    

      

        
        

          

              @kfiresmith
          

          

            
                kfiresmith
                / emit-sha512.py
            
            

              Last active
              October 31, 2023 16:28
            

              
                Emit a SHA512 shadow string for /etc/shadow
              
          

        

      

        

  

    
    


        



  


  

        

          
          #!/usr/bin/python
        

        

          
          import crypt
        

        

          
          import getpass
        

        

          
          import re
        

        

          
          import sys
        

        

          
          

        

        

          
          sys.dont_write_bytecode = True
        

        

          
          

        

        

          
          while True:
        

        

          
              password1 = getpass.getpass(prompt='Enter a password string to hash in SHA-512: ')