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WSL VPN DNS Fix

Problem

On Windows Subsystem for Linux (WSL), I noticed a perculiar thing when I connected to VPN -- the network connections stopped working. This problem was consistent across devices, and based on my SRE experience, I knew that it was probably a DNS problem. I just didn't know how to resolve it.

Then, I came across this thread, which kicked off the appropriate rabbit hole to search in to resolve my long standing problem.

Solution

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@fuzz_lightyear.register_factory('userID')
def create_biz_user_id():
  return do_some_magic_to_create_business()

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#!/bin/python3.6
import email
import logging
import os
import select
from io import StringIO
from socketserver import StreamRequestHandler
from socketserver import TCPServer
from socketserver import ThreadingMixIn

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from cmds.base import FlaskView as CmdFlaskView


class FlaskView(CmdFlaskView):
    route_prefix = '/api'

    @classmethod
    def on_socket_event(cls, event_name):
        """Registers a listener for websocket events.
        

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Bash Functions Return Values

The lame, old way: passing in a global variable, setting it in the function, then unsetting it later on.

#!/bin/bash

function foobar() {
    eval $1="some return value"
}

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Installing from local repository

pip install -e <path_to_root_file_with_setup.py>

Installing for a different version of Python

Use pip2.7 (or the like) instead.

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Deleting git tags

# Delete tag on remote, before you push
git push origin :refs/tags/<tagname>

# Replace the tag to reference the most recent commit
git tag -fa <tagname>

# Push the tag to remote

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Rename selected files using a regular expression

rename 's/\.bak$/.txt/' *.bak

Process Management

Check how long something takes to run

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Splunk Queries

I really don't like Splunk documentation. Why is it so hard to find out how to do a certain action? So this is a cheatsheet that I constructed to help me quickly gain knowledge that I need.

Analysis

Events over time

index="my_log"

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#!/bin/bash

function main() {
	case $1 in
    	a)
            echo "You typed in 'a'!"
            ;;
            
        b | 'd')
            # This fallthrough operator is introduced in Bash v4.