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@rudolfratusinski
rudolfratusinski / parallels_tools_ubuntu_new_kernel_fix.md
Last active November 24, 2024 02:13
Parallels Tools fix for Ubuntu 18.04 and other Linux distributions with Kernel version >= 4.15

Preparation

  • In open Ubuntu 18.04 machine click Parallels Actions -> "Install Parallels Tools"

  • A "Parallels Tools" CD will popup on your Ubuntu desktop.

  • Open it by double mouse click, copy all the content to a new, empty directory on a desktop, name it for e.g. "parallels_fixed"

  • Open terminal, change directory to parallels_fixed (cd ~/Desktop/parallels_fixed)

  • Make command line installer executable (chmod +x install)

  • Change directory to "installer" (cd installer)

  • Make few other scripts executable: chmod +x installer.* *.sh prl_*

@miguelmota
miguelmota / rsa_util.go
Last active July 29, 2025 13:12
Golang RSA encrypt and decrypt example
package ciphers
import (
"crypto/rand"
"crypto/rsa"
"crypto/sha512"
"crypto/x509"
"encoding/pem"
"log"
)
@brettscott
brettscott / aes-256-cbc-test.js
Last active July 23, 2025 16:47
AES 256 CBC encryption between Golang and Node JS
// Node v6.9.0
//
// TEST FILE (cut down for simplicity)
// To ensure Golang encrypted string can be decrypted in NodeJS.
//
let crypto;
try {
crypto = require('crypto');

WannaCry|WannaDecrypt0r NSA-Cyberweapon-Powered Ransomware Worm

  • Virus Name: WannaCrypt, WannaCry, WanaCrypt0r, WCrypt, WCRY
  • Vector: All Windows versions before Windows 10 are vulnerable if not patched for MS-17-010. It uses EternalBlue MS17-010 to propagate.
  • Ransom: between $300 to $600. There is code to 'rm' (delete) files in the virus. Seems to reset if the virus crashes.
  • Backdooring: The worm loops through every RDP session on a system to run the ransomware as that user. It also installs the DOUBLEPULSAR backdoor. It corrupts shadow volumes to make recovery harder. (source: malwarebytes)
  • Kill switch: If the website www.iuqerfsodp9ifjaposdfjhgosurijfaewrwergwea.com is up the virus exits instead of infecting the host. (source: malwarebytes). This domain has been sinkholed, stopping the spread of the worm. Will not work if proxied (source).

update: A minor variant of the viru

@saosir
saosir / image_fix.py
Last active August 13, 2025 05:54
文字照片或者图片角度校正,方便 tesseract 进行 ocr 识别
#!/usr/bin/python
# -*- coding:utf8 -*-
import sys
import os
import cv2
import math
import logging
import numpy as np
"""
@ipbastola
ipbastola / jq to filter by value.md
Last active September 4, 2025 02:27
JQ to filter JSON by value

JQ to filter JSON by value

Syntax: cat <filename> | jq -c '.[] | select( .<key> | contains("<value>"))'

Example: To get json record having _id equal 611

cat my.json | jq -c '.[] | select( ._id | contains(611))'

Remember: if JSON value has no double quotes (eg. for numeric) to do not supply in filter i.e. in contains(611)

@aklap
aklap / fix-missing-libcrypto-osx.md
Created October 17, 2016 04:25
Resolving missing link to libcrypto/openssl on OSX
@byrnedo
byrnedo / ComputeHmac256.go
Created September 12, 2016 07:32
Compute a hmac for a message in golang
func ComputeHmac256(message string, secret string) string {
key := []byte(secret)
h := hmac.New(sha256.New, key)
h.Write([]byte(message))
return base64.StdEncoding.EncodeToString(h.Sum(nil))
}
@subfuzion
subfuzion / Makefile.md
Last active January 9, 2025 21:50
Makefile for Go projects

Go has excellent build tools that mitigate the need for using make. For example, go install won't update the target unless it's older than the source files.

However, a Makefile can be convenient for wrapping Go commands with specific build targets that simplify usage on the command line. Since most of the targets are "phony", it's up to you to weigh the pros and cons of having a dependency on make versus using a shell script. For the simplicity of being able to specify targets that can be chained and can take advantage of make's chained targets,

@htp
htp / curl-websocket.sh
Last active September 8, 2025 02:19
Test a WebSocket using curl.
curl --include \
--no-buffer \
--header "Connection: Upgrade" \
--header "Upgrade: websocket" \
--header "Host: example.com:80" \
--header "Origin: http://example.com:80" \
--header "Sec-WebSocket-Key: SGVsbG8sIHdvcmxkIQ==" \
--header "Sec-WebSocket-Version: 13" \
http://example.com:80/