The basic way to alter the system’s date in Unix/Linux through the command line environment is by using “date” command.
Usually, posts that others posted on your Facebook are personal messages. They may contain sensitive or embarrassing information, and you just want to delete them right away. However, this can affect your relationship if your friends find out that their posts were deleted. If you are facing the same situation, hiding those wall posts away is a good idea.
grep is one of the more important Unix/Linux command-line utilities. This tutorial will demonstrate different ways of utilizing the text-search utility.
For many users updating to OS X Lion borks the keychain causing multiple errors to be written to the console. These error can cause a system running Lion to hang or to run slowly. To fix these errors, these directions will show you how to repair your keychain to speed up your mac system.
When you share a link on Facebook, the service will automatically set the title, and the description for you. If you do not like it, or you want to set this information yourself, this tutorial will help you.
Once your system is updated to OS X Lion, applications will attempt to automatically open from your last session. When you start an application, suddenly the last file you were using is staring you in the face. While many users will find this convenient, other users find this particularly annoying. Here is how to disable this new feature from Lion.
By default, OS X Lion has all new Finder windows open to All My Files. If you don’t utilize this as much as you do other directories such as Documents, your Home directory or a custom folder, you can change the default and make Finder’s new window be more useful to your needs.
Wolfram Alpha is an answer engine that is great for accessing all kinds of information including statistics and data analysis, socioeconomic data, mathematics, science, etc. Did you know that you can also use Wolfram Alpha to generate QR Codes and Bar Codes for your own personal use?
A primary key uniquely identify a row in a table. One or more columns may be identified as the primary key. The values in a single column used as the primary key must be unique (like a person’s social security number). When more than one column is used, the combination of column values must be unique.
MySQL tables are easy to extend with additional columns.
The best laid plans of mice and DBAs oft go awry, so it is sometimes necessary to change the characteristics of a column after it exists and contains data. Beware whenever you make changes to your database — always make a backup first.
The SQL command in this recipe removes a column and the column’s data from an existing MySQL table.
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