How to keep a track of all the commands run by any user in Linux
What if you want to know what were the commands which were executed by any user on any Linux serverMethod 1Check the .bash_history file in their home location.NOTE: You will not be able to see the...
View ArticleInstalling Linux and Linux Kernel (QUIZ)
NOTE: Each correct answer would give you 5 point.What advantages does GRUB offer over LILO boot loader?It enables you to boot multiple operating systemsIt enables you to permanently change GRUB conf...
View ArticleLinux User and Accounts Management (QUIZ)
NOTE: Each correct answer would give you 5 point.What do you type in the password field of /etc/passwd to prevent a user from accessing a system?A comma (')An asterisk (*)An exclamation mark (!)Two...
View ArticleOracle Database (QUIZ)
NOTE: Each correct answer would give you 5 pointsWhich portion of the System Global Area, also known as SGA holds information about changes made to the database?The redo log bufferThe database buffer...
View ArticleLinux General and Permission (QUIZ)
NOTE: Each correct answer will give you 5 pointsWhich command would you use to check the path of mv command?where mvfindout mvpath mvwhich mvWhich command would you use to edit events 56 to 60 using...
View ArticleHow to run any script or cron job in Linux for every second
There was this one time when I ran into the situation when my /tmp partition was getting full at 100% and I got an threshold alert but again when I checked the same it was never utilizing more than...
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Comparison and Difference between vSphere 5.1 and 5.5
This is one general question which can be asked to you in any interview but rather more being a VMware Administrator you should understand the new features introduced in the later version of VMware...
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Comparison Type 1 vs Type 2 Hypervisor
Before moving ahead with the types let us understand the meaning of an hypervisor.What is Hypervisor?A Hypervisor also known as Virtual Machine Monitor (VMM) can be a piece of software, firmware or...
View ArticleMinimum H/W requirements for VMware vCenter Server 4.x and 5.x
VMware vCenter Server 4.xHardwareRequirementProcessorIntel or AMD x86 (64-bit if installing vCenter Server 4.1) processor with two or more logical cores, each with a speed of 2GHz.Memory3GB RAM. RAM...
View ArticleInterview Questions on VMware ESXi with Answers
1. What is a Hypervisor?It is a program that allows multiple operating systems to share a single hardware host. Each operating system appears to have the host's processor, memory, and other resources...
View ArticleHow to detect new NIC/Ethernet card without rebooting in Linux
I have a Red Hat 6 vm created in my VMware Workstation Lab. I will just go ahead and add a new NIC card to my running RHEL machine.Now let us try to detect it without rebooting the OSIf we check the...
View ArticleHow to detect new hard disk attached without rebooting in Linux
Scenario:Suppose you have added a new hard disk to your Linux OS running on any Virtual Environment which in my case is VMware workstation. Once added the new hard drive, generally the changes won't...
View ArticleHow to take remote desktop of Windows from Linux
In Linux we have a utility rdesktop which is used to take remote to any Windows machine. let us see how it works and the iptable rules to allow or reject the same.You need to install rdesktop package...
View ArticleHow to configure logrotate for a new log file in Red Hat Linux
What is logrotate?logrotate is designed to ease administration of systems that generate large numbers of log files. It allows automatic rotation, compression, removal, and mailing of log files....
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How to configure PXE boot server in Linux using Red Hat 6
PXE is an abbreviation for Preboot eXecution Environment which describes a client server standardized environment to boot from a network a software assembly on a client i.e. an Operating System. It is...
View ArticleComparison and Difference between VMFS 3 and VMFS 5
New Unified 1MB File Block SizeEarlier versions of VMFS used 1, 2, 4 or 8MB file blocks. These larger blocks were needed to create large files (>256GB). These different file blocks sizes are no...
View ArticleHow to check the lock status of any user account in Linux
There are few commands which I know can be used to see if any user account on your Linux machine is locked.Case 1: Password LockedIn this case the password of any account is locked using the below...
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What are the different types of Virtual Web Hosting in Apache
Virtual Hosting is a method of hosting multiple domain names on a server using a single IP address. This allows one server to share its resources, such as memory and process cycles, in order to use its...
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How to configure iscsi target using Red Hat Linux
Before starting with the configuration let us understand some basics on iSCSI.Starting with the abbreviation iSCSI stands for Internet Small Computer System Interface which is a block level protocol...
View ArticleHow to prevent a command from getting stored in history in Linux
Q:Is it possible to avoid commands getting stored in history in Linux?A:Yes, you can do so in bash shell using the below methodIn bash there is a variable HISTCONTROLwhich can be used to achieve our...
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