Deepak Prasad

How to allow SSH for root login only from specific host or IP address? How to configure and restrict SSH to permit login only for certain users and/or groups?

configure and setup gfs2 file system with pacemaker cluster on rhel or centos 7 linux. configure gfs2 fs resource constraint using clvmd and dlm

difference between rescue mode and emergency mode in linux, rescue mode in linux linux emergency mode repair, rescue mode in linux, grub rescue mode

The other day I noticed this specific message on the console of Virtual Box VM installed with Ubuntu 22.04 RETBleed: WARNING: Spectre v2 mitigation leaves CPU vulnerable to RETBleed attacks, data leaks possible! As you …

Step by Step Installation Guide for Red Hat Enterprise Linux 8 Beta. Install RHEL 8 Beta with screenshots. How to install RHEL 8 Beta Linux with images.

Step by Step instructions to setup wordpress reverse shell using 3 different methods. Setup reverse shell using metasploit framework, vulnerable plugins, editing wordpress themes.

There are four different ways to compute square of a number in Java, Using multiplication operator *, Using Math.pow() function, Using BigInteger.pow() function, Using Apache Commons Math API

In this article I will share the steps to capture serial console dump from iLO4 using VSP with screenshots which can help you troubleshoot RSOD issue in BIOS

Steps to set java timezone using tzupdater update tzdata for openjdk in CentOS RHEL SLES. Check current tzdayta version in JRE java -jar tzupdater.jar -V

How to prevent user from using old password or reusing old password while providing new password in CentOS/RHEL 7 Password has been already used. Choose another

How to generate sosreport in rescue mode linux. Fix sosreport command not found. Boot using RHEL/CentOS DVD to rescue mode in linux with software raid linux

Earlier I was getting an error "The domain status of Virtual Connect Manager is not OK Update will not continue" while performing firmware upgrade of my Virtual Connect wherein one of my VC module had a hardware error …

Configure port forwarding in virtualbox NAT Networking using command line CLI using VboxManage GUI. ssh into virtualbox from windows port forwarding computer

Some of the task performed by the NumberFormat class in Java are Formatting Numbers, Setting number of Digits in Fraction part, Rounding Numbers, Formatting Percentage, Formatting Currency

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When operating with numbers and strings, many times while fetching the data from the text box, we fetch it as a string. Now, on back-end this data may be

It is a traditional way to paginate with mongoose. Here, It simply uses limit and offset in SQL queries to paginate the data from database. If you are working

A Stack is a Last in First out(LIFO) data structure. Push and pop operations are used for insertion and deletion of a value from the stack respectively. In

In this article we explored three different methods which can be used in Java to find merge point of two lists i.e Brute Force Approach, Marking Node as visited and Using HashSet

The Tree is a non linear data structure consisting of nodes and edges. Depending upon the type of tree, it can have 0 or more child nodes. There are two ways to calculate the height of a tree using Recursive Approach or …

In this tutorial, we covered four different approaches to convert char to int in Java, Using ASCII Values, Integer.parseInt() method, Character.getNumericValue() method and Subtracting '0'

In order to get sublist either in an ArrayList or LinkedList, we have to use the sublist() method which is a method of AbstractList class.

In this tutorial we will cover multiple examples to understand how to split string into array for different scenarios

There are three different ways to return an array from a function in Java as listed below: Return an array of primitive type, Return an array of objects, Return a multidimensional array

There are several ways to convert the set to list in java as listed below. Using looping, ArrayList Constructor, LinkedList Constructor, List.addAll() Method, List.copyOf() method, stream API, Apache Commons Collections

There are five ways to convert a String to Date in java as listed below. Using SimpleDateFormat Class, LocalDate Class, DateTimeFormater Class, Instant Class, Apache Commons Lang - DateUtils

There are several ways to compare characters in java as listed below, Using Relational Operators, Using Character.compare(), Using Character.hashCode(), Using compareTo() method, Using equals() method, Using charValue() …

The list below shows five different ways in which we can copy a file in Java. Using FileInputStream and FileOutputStream Using Paths and Files Using RandomAccessFile Class Using FileChannel Using Files.copy()

In Java, there are three different ways to check if file exists or not such as Using exists method of Legacy I/O File class, Using isFile method of File class, Using exists method of NIO File class

The list below shows eight different ways to get current date in Java Using java.util.Date, java.util.Calendar, java.time.LocalDateTime, java.time.LocalDate, java.time.Year, java.time.MonthDay, java.time.OffsetDateTime, …