General

Question: How do I find out the DELL service tag and express code of a PowerEdge server that is running VMWare ESXi (or VMWare Server)?

Answer: Depending on what you are running (i.e VMWare ESXi or VMWare Server), use one of the methods shown below to identify the DELL service tag.
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If your server has two HBA cards connected to EMC SAN storage device, you can implement load-balancing, and fail-over on the HBA cards using the EMC PowerPath software.

Powermt management utility helps you manage I/O paths from the server to the EMC storage device. In this article, let us discuss how to use powermt command with practical examples.

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Get Your Copy of Nagios Core 3 eBook

by Ramesh Natarajan on September 22, 2010

If you are a sysadmin, dba, network administrator, IT manager, or someone who is responsible for keeping the IT infrastructure up and running, you should implement a robust monitoring solution that will notify you when there is an issue. It should also notify the right people at the right time about a potential issue, even before it becomes critical.

Nagios Core 3 eBook is the only guide you’ll ever need to get your IT infrastructure monitored using Nagios Core, and I promise it will help you to understand everything you need to know to implement Nagios Core 3.
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How to Backup Linux? 15 rsync Command Examples

by Sasikala on September 9, 2010

rsync stands for remote sync.

rsync is used to perform the backup operation in UNIX / Linux.

rsync utility is used to synchronize the files and directories from one location to another in an effective way. Backup location could be on local server or on remote server.
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How to Send SMS Using Email to Major US Cellphone Carriers

by Ramesh Natarajan on August 20, 2010

Are you always sending SMS to your friend’s cellphone from your cellphone? Did you know that you can SMS to someone using email?

This list is extremely helpful, if you are outside US and would like to SMS someone in US, you can just send it as an email.
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10 Things Any Monitoring Software Should Do (Nagios Does it)

by Ramesh Natarajan on August 17, 2010

If you are a system administrator, or IT manager, or someone who is responsible for IT infrastructure, you should implement an enterprise level monitoring solution.

The shell script you’ve written that does a ps -ef and sends you an email might do the basic job, but it doesn’t count as monitoring.

If you want to be proactive, have peace of mind, and sleep well at night, you should implement a robust system and network monitoring solution for your IT infrastructure.
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10 IPCS Command Examples (With IPC Introduction)

by Sasikala on August 12, 2010

IPC stands for Inter-process Communication.

This technique allows the processes to communicate with each another.

Since each process has its own address space and unique user space, how does the process communicate each other?

The answer is Kernel, the heart of the Linux operating system that has access to the whole memory. So we can request the kernel to allocate the space which can be used to communicate between processes.
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RAID 0, RAID 1, RAID 5, RAID 10 Explained with Diagrams

by Ramesh Natarajan on August 10, 2010

RAID stands for Redundant Array of Inexpensive (Independent) Disks.

On most situations you will be using one of the following four levels of RAIDs.

  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 10 (also known as RAID 1+0)

This article explains the main difference between these raid levels along with an easy to understand diagram.
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