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@skreuzer
skreuzer / connect.c
Created December 24, 2011 17:33
Make socket connection using SOCKS4/5 and HTTP tunnel
/***********************************************************************
* connect.c -- Make socket connection using SOCKS4/5 and HTTP tunnel.
*
* Copyright (c) 2000-2004 Shun-ichi Goto
* Copyright (c) 2002, J. Grant (English Corrections)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
@jboner
jboner / latency.txt
Last active November 17, 2024 11:32
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
@dmytro
dmytro / ssh-multi.sh
Created October 31, 2012 03:46
Start multiple synchronized SSH connections with Tmux
#!/bin/bash
# ssh-multi
# D.Kovalov
# Based on http://linuxpixies.blogspot.jp/2011/06/tmux-copy-mode-and-how-to-control.html
# a script to ssh multiple servers over multiple tmux panes
starttmux() {
if [ -z "$HOSTS" ]; then
@sarim
sarim / repairsqlite.sh
Created September 6, 2013 08:14
Sqlite db repair script
#!/bin/bash
DBSTATUS=$(sqlite3 "$1" "PRAGMA integrity_check")
if [ "$DBSTATUS" == "ok" ] ; then
echo DB ALREADY OK
else
echo FIXING CORRUPT DB
TMPDB=$(mktemp -t sarim)
echo ".mode insert
.dump" | sqlite3 "$1" > $TMPDB
@marcusphi
marcusphi / ansible_conditionals_examples.yaml
Created October 2, 2013 09:48
Ansible 1.3 Conditional Execution -- Very complete example with comments -- I find the conditional expressions to be ridiculously hard to get right in Ansible. I don't have a good model of what's going on under the surface so I often get it wrong. What makes it even harder is that there has been at least three different variants over the course …
---
# This has been tested with ansible 1.3 with these commands:
# ansible-playbook -i hosts ansible_conditionals_examples.yaml --extra-vars="hosts=myhosts isFirstRun=false"
# ansible-playbook -i hosts ansible_conditionals_examples.yaml --extra-vars="hosts=myhosts isFirstRun=true"
# ansible-playbook -i hosts ansible_conditionals_examples.yaml --extra-vars="hosts=myhosts"
# NB: The type of the variable is crucial!
- name: Ansible Conditionals Examples
hosts: $hosts
vars_files:
@mwpher
mwpher / zfs-rollback.sh
Last active April 21, 2023 17:14
ZFS Recursive Rollback
#!/bin/sh
# Originally by: Dr. Martin Menzel www.dr-menzel-it.de
# Modified by Matthew Pherigo
#
# Use at your own risk. No warranty. No fee.
#
# parameter list:
# (1) the filesystem to be used to start decendant recursion
# example: apool/zones/webzone
# (2) the snapshot to which the filesystems should be rolled back
@thde
thde / whois.conf
Last active September 1, 2023 07:29
/etc/whois.conf WHOIS records for nTLDs.
##
# WHOIS servers for new TLDs (http://www.iana.org/domains/root/db)
# Current as of 2017-12-10 UTC
##
\.aarp$ whois.nic.aarp
\.abarth$ whois.afilias-srs.net
\.abbott$ whois.afilias-srs.net
\.abbvie$ whois.afilias-srs.net
\.abc$ whois.nic.abc
@nl5887
nl5887 / transfer.fish
Last active July 30, 2024 09:21
Bash and zsh alias for transfer.sh. Transfers files and directories to transfer.sh.
function transfer
if test (count $argv) -eq 0
echo "No arguments specified. Usage:\necho transfer /tmp/test.md\ncat /tmp/test.md | transfer test.md"
return 1
end
## get temporarily filename, output is written to this file show progress can be showed
set tmpfile ( mktemp -t transferXXX )
## upload stdin or file
#!/usr/bin/env python
#
# Calculates the total number of Science Packs needed for research
# in the game Factorio (www.factorio.com).
#
# Created by Gandalfx
# https://gandalfx.github.com
sciences = {
@benkulbertis
benkulbertis / cloudflare-update-record.sh
Last active October 22, 2024 19:31
Cloudflare API v4 Dynamic DNS Update in Bash
#!/bin/bash
# CHANGE THESE
auth_email="[email protected]"
auth_key="c2547eb745079dac9320b638f5e225cf483cc5cfdda41" # found in cloudflare account settings
zone_name="example.com"
record_name="www.example.com"
# MAYBE CHANGE THESE
ip=$(curl -s http://ipv4.icanhazip.com)