doublenns

# Local branches merged, or not merged, into master 
git branch --merged master
git branch --no-merged master

# Number of commits contributed per author
git shortlog -s -n

# Number of lines contributed per author
# Location within repo executed matters
git ls-files | while read f; do git blame -w -M -C -C --line-porcelain "$f" | grep -I '^author '; done | sort -f | uniq -ic | sort -n --reverse

doublenns

import socket

def check_conn_to_remote_port(address, port):
    s = socket.socket()
    #s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s.settimeout(5)
    print(f"Attempting to connect to {address} on port {port}")
    try:
        s.connect((address, port))
        print(f"Connected to {address} on port {port} -- success!")

doublenns

import requests
import sys
from requests.packages.urllib3 import Retry

def get_instance_region():
    instance_identity_url = "http://169.254.169.254/latest/dynamic/instance-identity/document"
    session = requests.Session()
    retries = Retry(total=3, backoff_factor=0.3)
    metadata_adapter = requests.adapters.HTTPAdapter(max_retries=retries)
    session.mount("http://169.254.169.254/", metadata_adapter)

doublenns

The region in which an EC2 instance is located is exposed via EC2 Instance Metadata.

Part of instance metadata is Instance Identity Documents. Specifically, the instance-identity/document endpoint is a dynamic data category that contains instance attributes such as the instanceId, privateIp, instanceType. And most relevantly the instance's region.

We can query the instance identity document via the 169.254.169.254 link-local address. (This only works on EC2 instances):

[ec2-user ~]$ curl http://169.254.169.254/latest/dynamic/instance-identity/document
{
  "devpayProductCodes" : null,
  "marketplaceProductCodes" : null,

doublenns

Get IP Address of specific Container:

CN="<docker_container_name>"
CIP=$(sudo docker inspect --format '{{ .NetworkSettings.IPAddress }}' $CN)

Retrieve all container IDs and corresponding IP addresses:

sudo docker inspect -f '{{.Name}} - {{.NetworkSettings.IPAddress }}' $(sudo docker ps -aq)

doublenns

python -c 'import yum, pprint; yb = yum.YumBase(); pprint.pprint(yb.conf.yumvar, width=1)'

Resource:
https://unix.stackexchange.com/a/20226

doublenns

# Check for network port connectivity on remote sys:
TCP_PORT_STATUS=`(echo > /dev/tcp/xx.xx.xx.xx/yyy) >/dev/null 2>&1 && echo "UP" || echo "DOWN"`; echo $TCP_PORT_STATUS
# xx.xx.xx.xx = Destination IP Address
# yyy = Destination Port

Ref: https://superuser.com/a/806331



# Create port listener on local computer using python

doublenns

#!/usr/bin/env osascript
-- Original Author: Chad Armstrong
-- Source: https://gist.github.com/edenwaith/2213a764ccb091d6a03989f238efb63f

-- Description: Count the number of open windows and tabs in Safari

tell application "Safari"

    --Variables
    set windowCount to count of windows

doublenns

#!/usr/bin/env python3

import subprocess


def run_shell_cmd(cmd, *shell):
    # Might want to use a "try" or call.check in case Command fails
    if "shell" or "sh" in shell.lower():
        process = subprocess.Popen(cmd,
                stdout=subprocess.PIPE, shell=True)

doublenns

param([string]$env="DEV")

$computers = Get-Content Documents\servers.txt

Foreach ($server in $computers){
    $ou_result = ([adsisearcher]"(&(name=$server)(objectClass=computer))").findall().path
    echo $ou_result | Select-String -Pattern $env -NotMatch
}