Phuc Phung Foxhound401

Semantic Commit Messages

See how a minor change to your commit message style can make you a better programmer.

Format: <type>(<scope>): <subject>

<scope> is optional

Example

Create Root CA (Done once)

Create Root Key

Attention: this is the key used to sign the certificate requests, anyone holding this can sign certificates on your behalf. So keep it in a safe place!

openssl genrsa -des3 -out rootCA.key 4096

On Tue Oct 27, 2015, history.state.gov began buckling under load, intermittently issuing 500 errors. Nginx's error log was sprinkled with the following errors:

2015/10/27 21:48:36 [crit] 2475#0: accept4() failed (24: Too many open files)

2015/10/27 21:48:36 [alert] 2475#0: *7163915 socket() failed (24: Too many open files) while connecting to upstream...

An article at http://www.cyberciti.biz/faq/linux-unix-nginx-too-many-open-files/ provided directions that mostly worked. Below are the steps we followed. The steps that diverged from the article's directions are marked with an *.

* Instead of using su to run ulimit on the nginx account, use ps aux | grep nginx to locate nginx's process IDs. Then query each process's file handle limits using cat /proc/pid/limits (where pid is the process id retrieved from ps). (Note: sudo may be necessary on your system for the cat command here, depending on your system.)
Added fs.file-max = 70000 to /etc/sysctl.conf

MongoDB Cheat Sheet

Show All Databases

show dbs

Show Current Database

Nginx Cheat Sheet

(from Understanding Nginx Server and Location Block Selection Algorithms - https://goo.gl/YyzshP)

server {

title: Setting Up Laravel in Ubuntu / DigitalOcean keywords: servers, laravel, coderstape, coder's tape description: Let's take a look at settting up a server from scratch for Laravel. date: April 1, 2019 tags: servers, laravel permalink: setting-up-laravel-in-ubuntu-digitalocean img: https://coderstape.com/storage/uploads/GZTXUbyGum2xeUZM9qBD5aPv8EKLwG3C8RGcRon4.jpeg author: Victor Gonzalez authorlink: https://github.com/vicgonvt

	APP_ENV=local
	APP_DEBUG=true
	APP_KEY=base64:hyHUpukUUigKeEsxpGeTW4UZ+Lg+WAWxcc4/BjlgNtE=
	APP_URL=http://localhost

	DB_CONNECTION=pgsql
	DB_HOST=hostname
	DB_PORT=5432
	DB_DATABASE=Your database name
	DB_USERNAME=Your database username

	/var/log/nginx_*.log {
	daily
	compress
	delaycompress
	rotate 2
	missingok
	nocreate
	sharedscripts
	postrotate
	test ! -f /var/run/nginx.pid \|\| kill -USR1 `cat /var/run/nginx.pid`

	# get total requests by status code
	awk '{print $9}' /var/log/nginx/access.log \| sort \| uniq -c \| sort -rn

	# get top requesters by IP
	awk '{print $1}' /var/log/nginx/access.log \| sort \| uniq -c \| sort -rn \| head \| awk -v OFS='\t' '{"host " $2 \| getline ip; print $0, ip}'

	# get top requesters by user agent
	awk -F'"' '{print $6}' /var/log/nginx/access.log \| sort \| uniq -c \| sort -rn \| head

	# get top requests by URL

	wget --no-check-certificate --content-disposition https://github.com/joyent/node/tarball/v0.7.1
	# --no-check-cerftificate was necessary for me to have wget not puke about https
	curl -LJO https://github.com/joyent/node/tarball/v0.7.1