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@ursuad
ursuad / kafka-cheat-sheet.md
Last active March 12, 2025 10:08
Quick command reference for Apache Kafka

Kafka Topics

List existing topics

bin/kafka-topics.sh --zookeeper localhost:2181 --list

Describe a topic

bin/kafka-topics.sh --zookeeper localhost:2181 --describe --topic mytopic

Purge a topic

bin/kafka-topics.sh --zookeeper localhost:2181 --alter --topic mytopic --config retention.ms=1000

... wait a minute ...

@ikenna
ikenna / print system and environment properties in sbt console
Last active February 29, 2024 15:00
SBT print system properties and env proprties
sbt> eval new scala.sys.SystemProperties().foreach(x => println(x))
sbt> eval scala.sys.env.foreach(x => println(x))
@samklr
samklr / ansible-gce.sh
Last active January 11, 2020 22:56
Ansible GCE setup
#! /bin/sh
### Must have Gcloud sdk installed and configured
###Create a micro instance as ansible master
gcloud compute --project $PROJECT_NAME instances create "ansible" --zone "us-central1-b" --machine-type "f1-micro" --network "default" --maintenance-policy "MIGRATE" --scopes "https://www.googleapis.com/auth/userinfo.email" "https://www.googleapis.com/auth/compute" "https://www.googleapis.com/auth/devstorage.full_control" --tags "http-server" "https-server" --no-boot-disk-auto-delete
###or a centos like in the tutorial
gcloud compute --project $PROJECT_NAME instances create "ansible-master" --zone "us-central1-b" --machine-type "g1-small" --network "default" --maintenance-policy "MIGRATE" --scopes "https://www.googleapis.com/auth/userinfo.email" "https://www.googleapis.com/auth/compute" "https://www.googleapis.com/auth/devstorage.full_control" --tags "http-server" "https-server" --image "https://www.googleapis.com/compute/v1/projects/centos-cloud/global/images/centos-7-v20140926" --no-boot-disk-auto-de
@meineerde
meineerde / mysql_backup.sh
Created January 31, 2011 21:24
MySQL backup
#!/bin/bash
umask 022
# paranoia settings
#
PATH=/sbin:/bin:/usr/sbin:/usr/bin
export PATH
TARGET="/backup/database"
@mathiasbynens
mathiasbynens / appify
Created November 12, 2010 13:46 — forked from subtleGradient/appify
appify — create the simplest possible Mac app from a shell script
#!/bin/bash
if [ "$1" = "-h" -o "$1" = "--help" -o -z "$1" ]; then cat <<EOF
appify v3.0.1 for Mac OS X - http://mths.be/appify
Creates the simplest possible Mac app from a shell script.
Appify takes a shell script as its first argument:
`basename "$0"` my-script.sh