Apache Kafka is a distributed streaming platform. Let’s explain it in more details. Apache Kafka is three key capabilities where publish and subscribe to streams of records, similar to a message queue or enterprise messaging system. Apache Kafka provides a distributed publish-subscribe messaging system and robust queue that can handle...
NTP is a core protocol used today’s IT infrastructure to synchronize date and time information. In order to work properly, we need to configuration NTP port in our server, client and intermediate systems like switch, firewall, router. NTP Port UDP 123 NTP uses the UDP port number 123 by default. NTP...
syslog is a standardized protocol used to send Logs and events to the Log server. syslog can be used in different platforms like Linux, Windows, Unix, Applications etc. In this tutorial we will look the default syslog port and secure syslog port and some examples about how to change this port number....
Nagios is an open source system, network, application monitoring system. Nagios is designed to be run on Linux operating system or distributions like Ubuntu, Debian, CentOS etc. Architecture and Components Nagios is not a single component to run. Nagios is actually a suite which provides following components. Nagios IX Nagios...
dmesg is used to print and control kernel ring buffer. This explanation may be confusing for the most of the readers. Here simplified explanation. dmesg provides logs for troubleshoot, diagnose or save which is created by Linux kernel. It provides low level messages which is not logged by other subsystems....
Web servers logs provide a lot of information about the web application and user. Apache is a very popular web server used by millions of web sites. Apache provides different types of logs like access , error etc. In this tutorial, we will look at how Apache Access Log configured and...
Robocopy or Robust File and Folder Copy application is very popular amongst in Windows system administrators. Robocopy will copy the local or given file to the remote or destination location. Syntax The general syntax of robocopy command is like below. SOURCE is the source file or directory we want to copy...
Git stores all commits as snapshots. We can commit limitless. If we can to review our commits we can use log command. Git Log We can simple list commits without any argument tot the log command.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | $ git log commit 877ab08a2c122c70326bb025530e48cb673c8505 Author: John Doe <jdoe@poftut.com> Date: Sat Oct 8 04:23:46 2016 +0000 Version 4,Added LICENSE commit 22dc9ad592d5bc21412a246791a05abd42e72793 Author: John Doe <jdoe@poftut.com> Date: Sat Oct 8 04:16:57 2016 +0000 Version 2, Add README commit 1156333b153c7bc164e194caf49a2720e490cb61 Author: John Doe <jdoe@poftut.com> Date: Fri Oct 7 09:32:07 2016 +0000 Start |
As we see there are 3 commits for the whole history of the Git repository....
Windows firewall is a useful mechanism which is used to control network traffic and ports. There are different ways to manage Windows firewall like GUI, Powershell and MS-DOS. Today we will look in detail how to manage windows firewall from command line with a popular tool named netsh . Netsh is...
Windows operating system provides different ways to manage remote systems. Telnet, RDP, VNC are some of them. But these options are generally bound to a graphical user interface. If we prefer command line interface there is an alternative named Psexec. Psexec is actually a toolset consisting of following tools. PSexec used...
