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 < /dev/tcp/127.0.0.1/23
# 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 |
Here are several different ways to test a TCP port without telnet.
$ cat < /dev/tcp/127.0.0.1/22
SSH-2.0-OpenSSH_5.3
^C
$ cat < /dev/tcp/127.0.0.1/23
#!/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 |
I recently had the following problem:
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
REG ADD HKLM\SYSTEM\CurrentControlSet\services\pvscsi\Parameters\Device /v DriverParameter /t REG_SZ /d "RequestRingPages=32,MaxQueueDepth=254" |
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. 🔥
# .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 |
--- | |
- 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" |