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@bretton
bretton / lnd-backup-restore-migrate.md
Last active July 27, 2021 04:34
LND Backup, Restore, Migrate
@Silverbaq
Silverbaq / Server.kt
Created January 1, 2018 21:15
A simple socket-server written in Kotlin
package dk.im2b
import java.io.OutputStream
import java.net.ServerSocket
import java.net.Socket
import java.nio.charset.Charset
import java.util.*
import kotlin.concurrent.thread
@jced-artem
jced-artem / UopzTrait.php
Last active June 12, 2021 08:10
Wrapper for php uopz library's functions. Very useful for unit testing for changing function's behaviour in runtime.
<?php
/**
* Trait UopzTrait
*
* Useful wrapper for uopz library's functions
*/
trait UopzTrait
{
/**
@matriphe
matriphe / ssh-telegram.sh
Last active May 7, 2023 15:00
Bash Script to notify via Telegram Bot API when user log in SSH
# save it as /etc/profile.d/ssh-telegram.sh
# use jq to parse JSON from ipinfo.io
# get jq from here http://stedolan.github.io/jq/
USERID="<target_user_id>"
KEY="<bot_private_key>"
TIMEOUT="10"
URL="https://api.telegram.org/bot$KEY/sendMessage"
DATE_EXEC="$(date "+%d %b %Y %H:%M")"
TMPFILE='/tmp/ipinfo-$DATE_EXEC.txt'
if [ -n "$SSH_CLIENT" ]; then
@mobilemind
mobilemind / git-tag-delete-local-and-remote.sh
Last active May 13, 2024 23:23
how to delete a git tag locally and remote
# delete local tag '12345'
git tag -d 12345
# delete remote tag '12345' (eg, GitHub version too)
git push origin :refs/tags/12345
# alternative approach
git push --delete origin tagName
git tag -d tagName
@epicserve
epicserve / redis_key_sizes.sh
Last active February 21, 2024 18:30
A simple script to print the size of all your Redis keys.
#!/usr/bin/env bash
# This script prints out all of your Redis keys and their size in a human readable format
# Copyright 2013 Brent O'Connor
# License: http://www.apache.org/licenses/LICENSE-2.0
human_size() {
awk -v sum="$1" ' BEGIN {hum[1024^3]="Gb"; hum[1024^2]="Mb"; hum[1024]="Kb"; for (x=1024^3; x>=1024; x/=1024) { if (sum>=x) { printf "%.2f %s\n",sum/x,hum[x]; break; } } if (sum<1024) print "1kb"; } '
}
@jboner
jboner / latency.txt
Last active May 17, 2024 01:05
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference 0.5 ns
Branch mispredict 5 ns
L2 cache reference 7 ns 14x L1 cache
Mutex lock/unlock 25 ns
Main memory reference 100 ns 20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy 3,000 ns 3 us
Send 1K bytes over 1 Gbps network 10,000 ns 10 us
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD
@btoone
btoone / curl.md
Last active May 14, 2024 19:32
A curl tutorial using GitHub's API

Introduction

An introduction to curl using GitHub's API.

The Basics

Makes a basic GET request to the specifed URI

curl https://api.github.com/users/caspyin