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Splunk Its all about machine data (logs) – Collect, Index and Analyze. Splunk is a software that indexes IT machine data from any Infrastructure components such as Application, Server (Physical & Virtual) , Network Devices, Web Servers etc . Splunk platform actually aggregates and analyzes the logs that is collected and indexed from various components. It’s powerful, versatile and fast search & analysis capability serves as a critical tool to investigate, troubleshoot, monitor, alert and report everything in a IT infrastructure. In other words, It is a Single point of source to view the real-time state of the entire IT infrastructure. Splunk Captures, indexes and correlates real-time data in a searchable repository from which it can generate graphs, reports, alerts, […]



Posted on (431) 557-1540

Let’s consider there are three web servers (www1, www2 & www3) in our environment and we want to know the stats of how many times the Web servers has processed successful HTTP requests (Status code of 200). Below is the Search query that yield the events with successful HTTP request events i.e., Status Code of “200” for all three hosts. index={value} source={value} host={value} status=”200″ | stats count(eval(status=”200″)) as {xyz} by host Note: Status Code is highlighted within the red box. Explanation: In this case, the search is querying for events from index (main) along with proper source and filtering for hosts (www*) and status (200). We then count the no of Successful HTTP requests (status=200) using stats and display the […]



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A quick comparison between the two major RedHat Enterprise Linux Operating System versions – RHEL6 & RHEL7. Below table shows a few differences between them. Component Red Hat Enterprise Linux 6 (Santiago) Red Hat Enterprise Linux 7 (Maipo) Release Date November 10, 2010 June 10, 2014 Kernel Version 2.6.32-* 3.10.0-* Default Filesystem Ext4 (fourth extended filesystem) XFS First Process Name/ID init (process ID =1) systemd (process ID=1) Maximum File Size 16TB 500TB Maximum file system size 16TB 500TB Maximum subdirectories 65000 Unlimited Languages supported 22 22 Desktop GUI Gnome 2.28 Gnome 3.8 Minimum diskspace 1GB minimum/5GB recommended 10GB minimum/20GB recommended Memory requirement (x86_64) Minimum : 1GB minimum/1 GB per logical CPU recommended 1GB minimum/1 GB per logical CPU recommended (Note: Network / PXE […]


Recovering deleted files in Linux

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Have you ever deleted a file in linux accidently and realized that it was a critical file and desperate to get the file back asap? You would then be after couple of questions that are knocking your mind hard. 1. Can I recover this file? 2. If so, how do I recover that deleted file ? The answer is Yes, If an Open file is deleted accidentally, it is possible to use lsof command to recreate a copy of the file; provided this is done before the file is closed by the application holding it open. If you have inadvertently removed a file from the filesystem, it is still recoverable if the application using the file is still running. On […]