How to write protect your USB flash drive.

Here is a really cool trick to write protect your usb flash drive.

For this trick to work you must know exactly how much space is available in your usb flash drive in bytes.

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Hiren's BootCD 11.1

Hiren's BootCD is a completely free bootable cd containing lots of tools which are capable of data recovery, partitioning, system analysis, benchmarking etc.
You can use these tools even if your primary OS has got corrupted, because all the tools boot directly from the cd.

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Oracle Database 10g Flashback Technology.

Flashback Database allows the DBA to “roll back” a table, set of tables or the entire database to a previous point-in-time.

First of all change the undo_retention parameter of your database.

SQL>show parameter undo_retention;

# The default value is 900 seconds.

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Oracle 10g Rman Configuration & Backup.

In Oracle database we can do two types of backup’s manual or through
Rman(Recovery Manager).

Then there are two backup modes hot and cold.
Hot backup means, that the backup operations are done when the database
is running.Cold backup is done when the database is shut down or
is in mount stage.

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Configuring yum in RHEL5.

1) Make a directory where all our RHEL5 dvd files will be stored.

mkdir -p /var/ftp/pub/repo

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How to hide files and folders in windows xp even when show hidden files and folders option is selected.

Here is a neat trick to hide your folders.

The best thing about this trick is that you can hide your personal data without the help of any third party software.

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Enabling Archive log mode in Oracle 10g and 9i.

First of all make sure that your database is started using spfile.
If you have created your database using DBCA then your database
will automatically start from spfile located in the dbs folder.

path of my spfile is "/u01/app/oracle/product/10.2.0/db_1/dbs/spfileorcl.ora"

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