We all know that when you simply delete a file, it’s possible to recover it later. Sometimes this is useful, if you accidentally delete something important; but usually this is a problem, and you really want that file gone forever. This howto will explain how to delete a file in linux securely and permanently, so it can never be recovered.

We all know that when you simply delete a file it's possible to recover it later. Sometimes this is useful, if you accidentally delete something important; but most of the time this is a problem, and you really want that file gone forever. This howto will explain how to delete a file in linux securely and permanently, so it can never be recovered.

When you delete a file, you are not really deleting it from your had drive. All the system does if free up the space occupied by that file to make room for other files and until that space is filled with new data, the files you tried to delete are actually still stored on your hard disk and can be recovered.

Typing the wrong command can severely cripple your computer. A wrong switch or wrong option is all it takes. One command that I learned to avoid a long time ago, based on what experienced users told me, is rm -rf /. The rm command is what you use to remove or delete a file or directory.

Ubuntu distribution uses nautilus as the default file manager. You can tweak nautilus to increase your productivity. Here is one hack which I discovered recently. When you right click on the desktop or inside your file manager you get a menu as shown in the screen shot below.

If you want to delete a record from any MySQL table then you can use the delete command. The delete command is very similar to the update command.

delete from table where where_condition;

The delete statement deletes rows from a table.
The table is the table name.
The where clause specifies the conditions that identify which rows to delete.

Ubuntu uses nautilus as the default file manager. You can effectively use nautilus to increase your productivity. Here I am telling about a useful hack for power users for opening folders in terminal . See the screen shot below

Deleting a file is a pretty simple task, right? Whether you’re in a GUI or on the command line, it’s really simple to delete a file. Once you’ve deleted it, it’s gone. Except - no it’s not.

I've shown previously how to customize the Nautilus File Manager in GNOME/Ubuntu with Nautilus Actions. Today I'm going to show how to add custom items to the file manager context menu in KDE4/Kubuntu.