yuri yuri1969

Common Options

-#, --progress-bar Make curl display a simple progress bar instead of the more informational standard meter.

-b, --cookie <name=data> Supply cookie with request. If no =, then specifies the cookie file to use (see -c).

-c, --cookie-jar <file name> File to save response cookies to.

Processing JSON using jq

jq is useful to slice, filter, map and transform structured json data.

Installing jq

On Mac OS

brew install jq

Random delay for cron.daily, cron.weekly, cron.monthly

Source

Wouldn’t it be nice if cron’s daily, weekly and monthly jobs could be run with a slight offset? At least that’s what I thought when 20+ servers were hitting my backup infrastructure at once. The scripts in /etc/cron.daily, /etc/cron.weekly and /etc/cron.monthly are triggered directly from crontab at fixed times. Here’s what /etc/crontab looks like in Ubuntu Server 16.04:

Kafka 0.11.0.0 (Confluent 3.3.0) added support to manipulate offsets for a consumer group via cli kafka-consumer-groups command.

List the topics to which the group is subscribed

kafka-consumer-groups --bootstrap-server <kafkahost:port> --group <group_id> --describe

Note the values under "CURRENT-OFFSET" and "LOG-END-OFFSET". "CURRENT-OFFSET" is the offset where this consumer group is currently at in each of the partitions.

Reset the consumer offset for a topic (preview)

ANSI Escape Sequences

Standard escape codes are prefixed with Escape:

Ctrl-Key: ^[
Octal: \033
Unicode: \u001b
Hexadecimal: \x1B
Decimal: 27

	#! /bin/sh
	# ==================================================================
	# ______ __ _____
	# /_ __/___ ____ ___ _________ _/ /_ /__ /
	# / / / __ \/ __ `__ \/ ___/ __ `/ __/ / /
	# / / / /_/ / / / / / / /__/ /_/ / /_ / /
	#/_/ \____/_/ /_/ /_/\___/\__,_/\__/ /_/

	# Multi-instance Apache Tomcat installation with a focus
	# on best-practices as defined by Apache, SpringSource, and MuleSoft

	wget -q -N --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jdk/8u101-b13/jdk-8u101-linux-x64.tar.gz" -O jdk-8u101-linux-x64.tar.gz

	tar -xf jdk-8u101-linux-x64.tar.gz

	wget -q -N --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jce/8/jce_policy-8.zip" -O jce_policy-8.zip

	unzip -qo jce_policy-8.zip

	rm -rf jdk1.8.0_101/jre/lib/security/local_policy.jar
	rm -rf jdk1.8.0_101/jre/lib/security/US_export_policy.jar

	<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
	http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
	version="3.1">
	</web-app>

	def text = "Going to convert this to Base64 encoding!"

	// Encode
	def encoded = text.bytes.encodeBase64().toString()
	println encoded


	// Decode
	byte[] decoded = encoded.decodeBase64()
	println new String(decoded)