General

Question: How do I check whether my Linux operating system is running on 32-bit or 64-bit?

Answer: If you’ve installed it, you should know, as the installation CD (or ISO image) for a 32-bit Linux OS and 64-bit Linux OS are different. Let us assume that your sysadmin installed the OS, and you didn’t know whether he used a 32-bit or 64-bit Linux.
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All open source applications use MySQL database.

With the introduction of stored procedures in MySQL 5, it is getting widely adopted by Oracle developers and commercial organizations.

If you are sysadmin, DBA, or developer, or someone who manages IT development, you should have good knowledge on MySQL database.
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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 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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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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