tott

/**
 * Check if a given ip is in a network
 * @param  string $ip    IP to check in IPV4 format eg. 127.0.0.1
 * @param  string $range IP/CIDR netmask eg. 127.0.0.0/24, also 127.0.0.1 is accepted and /32 assumed
 * @return boolean true if the ip is in this range / false if not.
 */
function ip_in_range( $ip, $range ) {
	if ( strpos( $range, '/' ) == false ) {
		$range .= '/32';
	}

mobilemind

# 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

gavinhungry

#
# Name: nginx-tls.conf
# Auth: Gavin Lloyd <gavinhungry@gmail.com>
# Desc: Nginx SSL/TLS configuration for "A+" Qualys SSL Labs rating
#
# Enables HTTP/2, PFS, HSTS and OCSP stapling. Configuration options not related
# to SSL/TLS are not included here.
#
# Additional tips:
#

learncodeacademy

Here's all you have to do to add clustering to your node.js application.

• save this code as cluster.js, and run cluster.js instead of server.js (or /bin/www, or whatever it's called for your project)
• the only line you'll need to change is the last line - it needs to point to the location of your server.js file

var cluster = require('cluster');

if (cluster.isMaster) {
  // Count the machine's CPUs
 var cpuCount = require('os').cpus().length;

isaacs

# Hello, and welcome to makefile basics.
#
# You will learn why `make` is so great, and why, despite its "weird" syntax,
# it is actually a highly expressive, efficient, and powerful way to build
# programs.
#
# Once you're done here, go to
# http://www.gnu.org/software/make/manual/make.html
# to learn SOOOO much more.

drkarl

Linux Backup Solutions

I've been looking for the best Linux backup system, and also reading lots of HN comments.

Instead of putting pros and cons of every backup system I'll just list some deal-breakers which would disqualify them.

Also I would like that you, the HN community, would add more deal breakers for these or other backup systems if you know some more and at the same time, if you have data to disprove some of the deal-breakers listed here (benchmarks, info about something being true for older releases but is fixed on newer releases), please share it so that I can edit this list accordingly.

Amanda (comments by sammcj)

• It has a lot of management overhead and that's a problem if you don't have time for a full time backup administrator.

Manouchehri

# Source:
# https://www.cloudflare.com/ips
# https://support.cloudflare.com/hc/en-us/articles/200169166-How-do-I-whitelist-CloudFlare-s-IP-addresses-in-iptables-

for i in `curl https://www.cloudflare.com/ips-v4`; do iptables -I INPUT -p tcp -m multiport --dports http,https -s $i -j ACCEPT; done
for i in `curl https://www.cloudflare.com/ips-v6`; do ip6tables -I INPUT -p tcp -m multiport --dports http,https -s $i -j ACCEPT; done

# Avoid racking up billing/attacks
# WARNING: If you get attacked and CloudFlare drops you, your site(s) will be unreachable. 
iptables -A INPUT -p tcp -m multiport --dports http,https -j DROP

papamoose

#!/bin/bash
# iPXE build depends
apt-get install -y liblzma-dev git build-essential

# clone iPXE
[ ! -d ./ipxe ] && git clone http://git.ipxe.org/ipxe.git
cd ipxe/src
make clean

sed -i  's/#undef\tDOWNLOAD_PROTO_HTTPS/#define\tDOWNLOAD_PROTO_HTTPS/' config/general.h

eldondev

wget -nc http://ftp.debian.org/debian/dists/jessie/main/installer-amd64/current/images/netboot/debian-installer/amd64/linux
wget -nc http://ftp.debian.org/debian/dists/jessie/main/installer-amd64/current/images/netboot/debian-installer/amd64/initrd.gz
cp -nv ~/.ssh/id_rsa.pub .
qemu-system-x86_64 -machine accel=kvm -kernel linux -initrd initrd.gz -m 1G -smp 2 -append "blacklist=vga16fb fb=false video=false vga=normal auto=true url=http://10.0.2.10:8080/debian-preseed.txt hostname=otto domain=" -net user,guestfwd=:10.0.2.10:8080-cmd:"/bin/busybox httpd -i" -hda /dev/shm/deb.img -net nic -display none

ygotthilf

ssh-keygen -t rsa -b 4096 -m PEM -f jwtRS256.key
# Don't add passphrase
openssl rsa -in jwtRS256.key -pubout -outform PEM -out jwtRS256.key.pub
cat jwtRS256.key
cat jwtRS256.key.pub