James Deathe jdeathe

How to grep the output of tail

When following a log file with the tail command you are typically looking for a specific pattern. If the log output is verbous it can be difficult to catch the lines your interested in. For example a PHP log file might contain many PHP Notice: entries but your only interested in lines containing PHP Fatal error:. To grep the output of tail simply tell the grep command to red from stdin and pipe the output from tail to grep as follows.

tail -f {path/to/log/file} | grep 'PHP Fatal error:' -

	<!DOCTYPE html>
	<html>
	<head>
	<title>JavaScriptLoader</title>
	<link rel="stylesheet" href="http://code.jquery.com/ui/1.8.23/themes/base/jquery-ui.css" type="text/css" media="all" />
	<style type="text/css">
	body.jsLoaded .hidden {display: none;}
	</style>
	</head>

	# - Create an SSH container on localhost exposing the default port 22.
	# - If you have a default SSH public key (i.e. ~/.ssh/id_rsa.pub) use that
	# but if not the Vagrant insecure public key will be used.
	# - Assumes that the docker bridge network is on 172.17.0.1/24
	# - Assumes that the host network is 192.168.1.1/24
	# - Connect client's (browser/mobile phone) to {host-public-ip-address}:8888 (or localhost:8888 from host).

	docker pull jdeathe/centos-ssh:centos-7-2.1.2

	eval "sudo -E $(

	# From local checkout : clone repo
	git clone [email protected]:jdeathe/centos-ssh-apache-php.git \
	&& cd centos-ssh-apache-php

	# Checkout release branch
	git checkout centos-6

	# Use --help for usage.
	# Use --info to view command that will be run
	# Note: -i \| install, -u \| uninstall

	#!/usr/bin/env bash

	# REF: https://github.com/cloudflare/cfssl

	# Change working directory
	cd -- "$(
	dirname "${0}"
	)" \|\| exit 1

	readonly CA_ROOT_CERT_KEY="ca-root"

	<?php

	date_default_timezone_set(
	'UTC'
	);

	// Mock Cloud-Init metadata service for cloud-config

	// From VirtualBox host machine run:
	// env METADATA_INSTANCE_ID="iid-5cd832f4bc69" sudo -E php -S 0.0.0.0:80 Cloud-Init_MetadataRouter.php

	# - Create an DNS container on localhost exposing the default tcp + udp port 53.
	# - Disable the SSH features and process - using local docker.
	# - Create a loopback alias with on 192.168.127.1/24 to allow routing between
	# host and containers.
	# - http://www.thekelleys.org.uk/dnsmasq/doc.html
	# - http://www.thekelleys.org.uk/dnsmasq/docs/dnsmasq-man.html

	LOOPBACK_ALIAS="192.168.127.1/24"
	LOOPBACK_ALIAS_IP="${LOOPBACK_ALIAS%%/*}"

	#
	# WARNING! This configures a Man-In-The-Middle proxy that decrypts HTTPS traffic.
	#
	# - Requires Local DNS: https://gist.github.com/jdeathe/252578a3217ab9782fed10c3b3816d30
	# - Disable the SSH features and process - using local docker.
	# - https://docs.docker.com/engine/userguide/networking/
	# - http://www.squid-cache.org/Versions/v3/3.3/cfgman/http_port.html
	# - http://www.squid-cache.org/Versions/v3/3.3/cfgman/ssl_bump.html
	# - http://www.squid-cache.org/Versions/v3/3.3/cfgman/refresh_pattern.html
	# - https://www.openssl.org/docs/manmaster/ssl/SSL_CTX_set_options.html

	################################################################
	# Global configuration
	################################################################

	# Timeout in seconds.
	# Duration to give active requests a chance to finish during hot-reloads
	#
	# Optional
	# Default: 10
	#


	[backends]
	[backends.http-pool-1]
	[backends.http-pool-1.circuitbreaker]
	expression = "NetworkErrorRatio() > 0.5"
	[backends.http-pool-1.maxconn]
	amount = 10240
	extractorfunc = "request.host"
	[backends.http-pool-1.LoadBalancer]
	method = "drr"