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@solenoid
solenoid / gist:1372386
Created November 17, 2011 04:49
javascript ObjectId generator
var mongoObjectId = function () {
var timestamp = (new Date().getTime() / 1000 | 0).toString(16);
return timestamp + 'xxxxxxxxxxxxxxxx'.replace(/[x]/g, function() {
return (Math.random() * 16 | 0).toString(16);
}).toLowerCase();
};
@jboner
jboner / latency.txt
Last active November 15, 2024 14:00
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
@tommybutler
tommybutler / vmware-autostarts
Last active October 26, 2024 06:25
This LSB-compliant Linux boot init script lets you auto-start VMware virtual machines on a Linux host machine running VMware Workstation. Tested successfully on Debian 7 and assumed safe for any Ubuntu or Ubuntu-based distro as well. May need some minor tweaks before you can use it on CentOS or RHEL.To use this script, follow installation instru…
#!/usr/bin/env bash
### BEGIN INIT INFO
# Provides: vmwareautostart
# Required-Start: $vmware $network $syslog
# Required-Stop: $vmware $network $syslog
# X-Start-Before:
# X-Stop-After:
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
@asciidisco
asciidisco / nha.md
Last active October 20, 2017 20:06
Node homeautomation
@LeSpocky
LeSpocky / rounded_corner.scad
Last active September 24, 2024 18:39
rounded square in openscad
module rounded_square( width, radius_corner ) {
translate( [ radius_corner, radius_corner, 0 ] )
minkowski() {
square( width - 2 * radius_corner );
circle( radius_corner );
}
}
module alternative_square( width, r_c ) {
hull() {
@z0mbix
z0mbix / tcpdump-es-capture
Created December 19, 2014 14:45
Capture Elasticsearch Queries
# tcpdump -A -nn -s 0 'tcp dst port 9200 and (((ip[2:2] - ((ip[0]&0xf)<<2)) - ((tcp[12]&0xf0)>>2)) != 0)' -i lo
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on lo, link-type EN10MB (Ethernet), capture size 65535 bytes
14:32:33.525122 IP 127.0.0.1.49777 > 127.0.0.1.9200: Flags [P.], seq 313752908:313753888, ack 2465010394, win 257, options [nop,nop,TS val 2684167067 ecr 2684167066], length 980
E...^.@[email protected]#...}L...............
..#...#.GET /index/_search HTTP/1.1
Host: 127.0.0.1:9200
Accept: */*
Content-Length: 845
Content-Type: application/x-www-form-urlencoded
@jokey2k
jokey2k / sshfilter.sh
Last active April 22, 2024 14:18
Tuned version of sshfilter.sh to allow for ipv6 filtering
#!/bin/bash
# based on script from http://www.axllent.org/docs/view/ssh-geoip
# License: WTFPL
# UPPERCASE space-separated country codes to ACCEPT
ALLOW_COUNTRIES="DE EU GB"
LOGDENY_FACILITY="authpriv.notice"
if [ $# -ne 1 ]; then
echo "Usage: `basename $0` <ip>" 1>&2
@sling00
sling00 / dfree
Last active October 22, 2023 13:05
disk free for samba that can determine fs type and calculate accordingly.
#!/bin/bash
#Originally by stanislavs from post http://stanislavs.org/reporting-correct-space-usage-for-samba-shared-zfs-volumes/#comment-2443
#Used some updated code from github user umito / Peter on that site to clean up the non zfs code.
if [[ `findmnt -n -o FSTYPE -T "$PWD" | grep -c zfs` > 0 ]]
then
# echo "DEBUG: this is zfs"
USED=$((`zfs get -o value -Hp used $PWD` / 1024)) > /dev/null
AVAIL=$((`zfs get -o value -Hp available $PWD` / 1024)) > /dev/null
TOTAL=$(($USED+$AVAIL)) > /dev/null
@groovenectar
groovenectar / roundedcube.scad
Last active October 12, 2024 06:36
roundedcube.scad - Fork me and make me better!
// More information: https://danielupshaw.com/openscad-rounded-corners/
// Set to 0.01 for higher definition curves (renders slower)
$fs = 0.15;
module roundedcube(size = [1, 1, 1], center = false, radius = 0.5, apply_to = "all") {
// If single value, convert to [x, y, z] vector
size = (size[0] == undef) ? [size, size, size] : size;
translate_min = radius;
@jcarbaugh
jcarbaugh / discover.py
Created September 30, 2015 17:33
DIAL examples
import httplib
import socket
import StringIO
# generic
SSDP_ALL = 'ssdp:all'
UPNP_ROOT = 'upnp:rootdevice'
# devices
DIAL = 'urn:dial-multiscreen-org:service:dial:1'