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Isn’t it difficult to tackle certain situations when one wrong step can change the entire consequences? Yes, some situations make us dumbfound, and paralyze our decision-making capabilities whether that has a positive or negative impact on our project’s life. So, don’t you think that it is better to have some tools and techniques to deal with such threats and opportunities?Irrespective of the project’s duration and intricacy, risks are always there and in the case of long-term complex projects, the level of risks increases manifolds. So, to minimize the negative impact on our projects, we should have a concrete plan with ... Read More
Last week, while discussing with my colleagues on various topics, the discussions took an unexpected turn and reached to one of the trending topic called ‘Employee Attrition’. Frankly saying it was not unexpected, actually for the last couple of months we have been seeing many ‘good-bye’ or ‘keep in touch’ kind of parting emails almost twice or thrice in a week. Everybody is discussing on it, whether it is during lunch time or coffee breaks, the gossip and rumors are in the air!These type of discussions are not only restricted to one company. Actually, you can see such trends in ... Read More
This article helps you to create and add a new virtual disk to an existing Linux virtual machine on VMware. Here are some steps for adding a new SCSI based virtual disk on a CentOS Linux virtual machine. We are assuming that you are already familiar with Linux system administration skills and having knowledge of vCenter Server or vSphere Client. For a full description of the utilities mentioned in this article, please refer to the manuals.SolutionTo add a new virtual disk for an existing Linux virtual machine, Log in as root on your Linux virtual machine. Run this below command ... Read More
In this article, we will learn how to create a RAID 5 Array configuration using the ‘mdadm’ utility.The ‘mdadm’ is a utility which is used to create and manage storage arrays on Linux with RAID capability where the administrators are having great flexibility in managing the individual storages devices and creating the logical storage with a high performance and redundancy.RAID 5 Array is a type where we implement by striping the data across the total available devices. Every component of the each stripe is calculated by parity block. If any device fails the parity block, it will use the remaining ... Read More
In this article, we will learn how to create a RAID 0 Array configuration using the ‘mdadm’ utility.The ‘mdadm’ is a utility which is used to create and manage storage arrays on Linux with RAID capability where the administrators are having a great flexibility in managing the individual storage devices and creating the logical storage with a high performance and redundancy.RAID 0 array will work by dividing the data into small chunks and strips that data across the available storage disks, which means that each and every storage disk will contain a portion of data and when retrieving the data ... Read More
In this article, we will teach you on – how to schedule a corn job to execute at a specific time.General Syntax of a Cron JobMIN HOUR Day of month Month Day of Week Command 0-59 0-23 1-31 1-12 0-6 linux command or scriptTo see a list of Cron Jobs which exists on the machine, run the below command –# crontab -l no crontab for rootTo add the new cron job, run the below command –#crontab -e no crontab for root - using an empty one Select an editor. To change later, run 'select-editor'. 1. /bin/ed 2. /bin/nano
In multithreading environment, two or more threads can access the shared resources simultaneously which can lead the inconsistent behavior of the system. Java uses concept of locks to restrict concurrent access of shared resources or objects. Locks can be applied at two levels −Object Level Locks − It can be used when you want non-static method or non-static block of the code should be accessed by only one thread.Class Level locks − It can be used when we want to prevent multiple threads to enter the synchronized block in any of all available instances on runtime. It should always be used ... Read More
In this article, we will know how to count the number of threads in a process on Linux environment, there are several ways to do it, but we will learn using ‘/proc’ and ‘ps’ command.Using ‘/proc’In Proc pseudo file system, this resides in /proc directory, and this is the easiest way to see the thread count of the task or active process. The ‘proc’ directory exports the form of readable text files to give the information related to the existing processes and the system hardware such as Interrupts, CPU, memory, disk, etc.# cat /proc//statusThe above command is the general syntax ... Read More
Binding is a mechanism creating link between method call and method actual implementation. As per the polymorphism concept in Java , object can have many different forms. Object forms can be resolved at compile time and run time. If linking between method call and method implementation is resolved at compile time then we call it static binding or If it is resolved at run time then it dynamic binding. Dynamic binding uses object to resolve binding but static binding use type of the class and fields. Sr. No.KeyStatic BindingDynamic Binding1Basic It is resolved at compile time It is resolved at run time 2 ... Read More
In this article, we will be covering about the installation of Nagios 4, a very popular and open source monitoring tool on Centos 6.7. We shall cover some basic configuration steps which might be useful to monitor a host of resources via the web interface. Here, we shall also utilize the Nagios Remote Plugin Executor (NRPE) that is installed as an agent on remote hosts to monitor the local resources of Servers/clients.Nagios is useful for keeping an inventory of your servers, and making sure your critical services are up and running. Using a monitoring system, Nagios is an essential tool ... Read More