chrisdpa-tvx

$URL=(Invoke-WebRequest -UseBasicParsing https://www.java.com/en/download/manual.jsp).Content | %{[regex]::matches($_, '(?:<a title="Download Java software for Windows Online" href=")(.*)(?:">)').Groups[1].Value}
Invoke-WebRequest -UseBasicParsing -OutFile jre8.exe $URL
Start-Process .\jre8.exe '/s REBOOT=0 SPONSORS=0 AUTO_UPDATE=0' -wait
echo $?

chrisdpa-tvx

#!/usr/bin/python -u
import math
import sys


def entropy(string):
    prob = [float(string.count(c)) / len(string) for c in dict.fromkeys(list(string))]
    return - sum([p * math.log(p) / math.log(2.0) for p in prob])

chrisdpa-tvx

=Navigating=
    visit('/projects')
    visit(post_comments_path(post))

=Clicking links and buttons=
    click_link('id-of-link')
    click_link('Link Text')
    click_button('Save')
    click('Link Text') # Click either a link or a button
    click('Button Value')

chrisdpa-tvx

Recursive Grep

unix:

grep -R 'bruce'

Powershell

chrisdpa-tvx

Updating python to use TLS1.2 is now required (this is the problem the guys in devops encountered) and here is how to do it.

If you are using virtualenv you’ll need to deactivate it:

deactivate

then use brew to install the latest version of python and openssl:

brew install python@2

chrisdpa-tvx

Resize-Partition -DiskNumber 3 -PartitionNumber 2 -Size $((get-disk -Number 3  | Get-PartitionSupportedSize -PartitionNumber 2).sizemax)

chrisdpa-tvx

#!/usr/bin/env python3

# Start a mail relay using docker:
#
#    docker run -p 25:25 namshi/smtp
#

import smtplib
from email.message import EmailMessage
from email.headerregistry import Address

chrisdpa-tvx

# Remove any volumes that are not attached to an AWS instance

aws ec2 describe-volumes | \
jq -r '.Volumes[] | select( (.Attachments|length)==0 ) | .VolumeId ' | \
xargs -J % -n 1 aws ec2 delete-volume --volume-id %

# Remove DB snapshots that are older than a month
aws rds describe-db-snapshots | \
jq -r ".DBSnapshots[] | select( (.SnapshotCreateTime<\"$(date -v-1m -u +%Y-%m-%dT%H:%M:%S.000Z)\") and (.SnapshotType==\"manual\")) | .DBSnapshotIdentifier" | \
xargs -J % -n 1 sts aws rds delete-db-snapshot --db-snapshot-identifier %

chrisdpa-tvx

Run command lives here:

/var/lib/cloud/instance/scripts/runcmd

Config is in:

/var/lib/cloud/instance/cloud-config.txt

Check (powershell):

chrisdpa-tvx

aws kms create-key

# Encrypt the contents of the file 
aws kms encrypt \
--key-id ${key_id_from_create_key_step} \
--plaintext fileb://super_secret_file \
--output text \
--query CiphertextBlob > super_secret_file.enc.b64

# Decrypt the contents of the file