iAnatoly

1. create bot by messaging @botfather (/newbot)
2. save a token in env var: export token="yourtokenfrombotfather". If you need to re-issue a token, use /revoke command to botfather.
3. add your bot to a channel you intend for alerts
4. Send some message into that channel using telegram client. A simple "test" will do.
5. get chat id: curl https://api.telegram.org/bot${token}/getUpdates | grep test
6. send a test message: curl https://api.telegram.org/bot${token}/sendMessage --data '{"chat_id":${chat_id},"text": "message"}' -H "Content-type: application/json"
7. codify the above experience.

#!/bin/bash
set -eu -o pipefail

iAnatoly

1. Create a file with json request, for example:

$ cat > TTS.json <<END
{
  "audioConfig": {
    "audioEncoding": "LINEAR16",
    "pitch": 0,
    "speakingRate": 1
 },

iAnatoly

#!/usr/bin/env python3
import socket
import time
 
userid = "trivial_sip_pinger"
domain = "<sip server to test>"
port = 5060
timeout_ms = 1000
 
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

iAnatoly

First, find out which is the encrypted LVM partition

cat /etc/crypttab

To add a new password, use luksAddKey:

sudo cryptsetup luksAddKey /dev/sda3

To remove an existing password, use luksRemoveKey:

iAnatoly

#!/bin/bash

TARGET_FILE_NUM=$1
CURRENT_FILE_NUM=`ls -l | wc -l`
FILES_TO_GENERATE=$((TARGET_FILE_NUM - CURRENT_FILE_NUM))

if [[ $FILES_TO_GENERATE -lt 0 ]]; then
	echo "We already have $CURRENT_FILE_NUM files, no need to generate more"
	exit
fi

iAnatoly

#!/bin/bash
openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -sha256 -days 365 -nodes

iAnatoly

https://stackoverflow.com/questions/614795/simulate-delayed-and-dropped-packets-on-linux
https://wiki.linuxfoundation.org/networking/netem

```bash
TARGET1='8.8.8.8'
DEV='eth0'

tc qdisc delete dev $DEV root
tc qdisc add dev $DEV root handle 1: prio

iAnatoly

go install -v github.com/projectdiscovery/dnsx/cmd/dnsx@latest
go install -v github.com/projectdiscovery/subfinder/v2/cmd/subfinder@latest
brew install ipinfo-cli
./go/bin/subfinder -d google.com | ./go/bin/dnsx -resp-only | ipinfo summarize

iAnatoly

• iTerm2
• iStat menus
• VS code
• ObjeciveSee: BlockBlock, KnockKnock
• Homebrew: ansible, telegraf, bash5, curl, wget, sqlite, python3, go,
• Commons: Chrome, Chromium, FF, Kindle, VLC

iAnatoly

SSH_ENV="$HOME/.ssh/agent-environment"

function start_agent {
    echo "Initialising new SSH agent..."
    /usr/bin/ssh-agent | sed 's/^echo/#echo/' > "${SSH_ENV}"
    echo succeeded
    chmod 600 "${SSH_ENV}"
    . "${SSH_ENV}" > /dev/null
    /usr/bin/ssh-add;
}