alikulov

---
- name: ONTAP Firmware Upgrade
  hosts: localhost
  gather_facts: no
  collections:
    - netapp.ontap
  vars_prompt:
    - name: "ontap_admin_username"
      private: no
      prompt: "Enter your ONTAP admin username"

alikulov

# .flake8
#
# DESCRIPTION
#       Configuration file for the python linter flake8.
#
#       This configuration is based on the generic
#       configuration published on GitHub.
#
# AUTHOR   krnd
# VERSION  v1.0

alikulov

I've been working with Kafka for over 7 years. I inevitably find myself doing the same set of activities while I'm developing or working with someone else's system. Here's a set of Kafka productivity hacks for doing a few things way faster than you're probably doing them now. 🔥

• Show me all my Kafka topics and their partitions, replicas, and consumers
• Show me the contents of a topic
• Create a Kafka topic
• Produce messages to a Kafka topic
• Validate the schema of messages before producing to a topic
• Do all of this at a distance

Get the tools

alikulov

List all stopped containers

docker ps -a -f status=exited

Delete all stopped containers

docker rm $(docker ps -a -f status=exited -q)

alikulov

REG ADD HKLM\SYSTEM\CurrentControlSet\services\pvscsi\Parameters\Device /v DriverParameter /t REG_SZ /d "RequestRingPages=32,MaxQueueDepth=254"

alikulov

Opening and closing an SSH tunnel in a shell script the smart way

I recently had the following problem:

• From an unattended shell script (called by Jenkins), run a command-line tool that accesses the MySQL database on another host.
• That tool doesn't know that the database is on another host, plus the MySQL port on that host is firewalled and not accessible from other machines.

We didn't want to open the MySQL port to the network, but it's possible to SSH from the Jenkins machine to the MySQL machine. So, basically you would do something like

ssh -L 3306:localhost:3306 remotehost

alikulov

#!/bin/sh
SERVICE_NAME=MyService
PATH_TO_JAR=/usr/local/MyProject/MyJar.jar
PID_PATH_NAME=/tmp/MyService-pid
case $1 in
    start)
        echo "Starting $SERVICE_NAME ..."
        if [ ! -f $PID_PATH_NAME ]; then
            nohup java -jar $PATH_TO_JAR /tmp 2>> /dev/null >> /dev/null &
                        echo $! > $PID_PATH_NAME

alikulov

Here are several different ways to test a TCP port without telnet.

BASH (man page)

$ cat < /dev/tcp/127.0.0.1/22
SSH-2.0-OpenSSH_5.3
^C

$ cat &lt; /dev/tcp/127.0.0.1/23

alikulov

# Basic Dante Socks5 Setup, Debian

apt-get update
apt-get install make gcc

cd /usr/src

# get newest from http://www.inet.no/dante/download.html

wget http://www.inet.no/dante/files/dante-1.4.1.tar.gz