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turning coffee into code since late 90s

Vyacheslav Voronenko

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turning coffee into code since late 90s
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Voronenko / Bash Script Header.sh
Created November 11, 2021 15:06
bash bash bash
#!/bin/bash
#!/usr/bin/env bash
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Voronenko / wakeup_python.sh
Created November 2, 2021 19:30
Here is a Python script that does wake on lan (if your MAC address is01-23-45-67-89-0a:
#!/usr/bin/env python
import socket
s=socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.sendto('\xff'*6+'\x01\x23\x45\x67\x89\x0a'*16, ('192.168.1.255', 80))
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Voronenko / mfa.txt
Created October 28, 2021 20:47
An error occurred (InvalidClientTokenId) when calling the ListAccountAliases operation: The security token included in the request is invalid.
Run the sts get-session-token AWS CLI command, replacing the variables with information from your account, resources, and MFA device:
$ aws sts get-session-token --serial-number arn-of-the-mfa-device --token-code code-from-token
You receive an output with temporary credentials and an expiration time (by default, 12 hours) similar to the following:
{
"Credentials": {
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Voronenko / install_jupyter_package.py
Created October 19, 2021 08:21
import sys
!conda install --yes --prefix {sys.prefix} pymongo
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Voronenko / metrics.txt
Created October 16, 2021 20:56
# HELP node_nslookup dns lookup time in ms
# TYPE node_nslookup gauge
node_nslookup{ns="1.2.3.4",record="api.cloudpayments.ru"} 0
node_nslookup{ns="8.8.8.8",record="api.cloudpayments.ru"} 15
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Voronenko / recover_dev_null.sh
Created October 7, 2021 12:22
mknod /dev/null c 1 3
chmod 666 /dev/null
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Voronenko / show_files_out_of_git_control.sh
Created October 3, 2021 17:45
#!/bin/bash
git ls-files --others --ignored --exclude-from=.gitignore
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Voronenko / le_cert_problem_centos.txt
Created September 30, 2021 20:04
TL;DR — For TLS certificates issued by Let’s Encrypt, the root certificate (DST Root CA X3) in the default chain expires on September 30, 2021. Due to their unique approach, the expired certificate will continue to be part of the certificate chain till 2024. This affects OpenSSL 1.0.2k on RHEL/CentOS 7 servers, and will result in applications/tools failing to establish TLS/HTTPS connections with a certificate has expired message.
As of 24/9/21, upgrading ca-certificates package (2021.2.50–72) should fix the issue. Version 2021.2.50–72 removes DST Root CA X3.
As of 17/9/21, the only available solution is to blacklist the root certificate as follows,
trust dump --filter "pkcs11:id=%c4%a7%b1%a4%7b%2c%71%fa%db%e1%4b%90%75%ff%c4%15%60%85%89%10" | openssl x509 | sudo tee /etc/pki/ca-trust/source/blacklist/DST-Root-CA-X3.pem
sudo update-ca-trust extract
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Voronenko / dashbord-to-jsonnet.py
Created September 30, 2021 11:05 — forked from tennix/dashbord-to-jsonnet.py
Convert Grafana dashboard json to jsonnet
#!/usr/bin/env python
import json
from jinja2 import Template
# git clone https://github.com/pingcap/tidb-docker-compose
# cd tidb-docker-compose
# git clone https://github.com/tennix/grafonnet-lib -b table
# python dashboard-to-jsonnet.py > pd.jsonnet
# jsonnet -J grafonnet-lib pd.jsonnet > config/dashboards/generated-pd.json
with open('config/dashboards/pd.json', 'r') as f:
data = json.load(f)
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Voronenko / telnet-apk.sh
Created September 22, 2021 14:20
apk --update --no-cache add busybox-extras