How many times did you type a command and forgot to type sudo first ? What do you want to say when that happens ? No, not that…you might want to say : sudo !!

One of the most common validation checks is the simple check for data type. Validating by data type involves checking the user's input to make sure it is an integer number, a monetary amount, or some other type comparison.

Some times you need to know the device node identifier. e.g. /dev/sda1, a partition UUID, a partition label or partition type (ntfs,fat32 etc). By using the following command you can see all the relevant information about your partitions.

On several situation you will need to find out the version of ubuntu (debian) installed in a system you are using.
For that open the command terminal and type:

A personal information manager (often known as a PIM tool) is a type of collaborative software that can help you manage your life by offering personal organising functionality. This type of software enables you to more efficiently manage and plan your business and personal life by keeping track of contact information, appointments, tasks, diaries, to-do lists, and birthdays.

The consensus among new Unix and Linux users seems to be that sudo is more secure than using the root account, because it requires you type your password to perform potentially harmful actions. In reality, a compromised user account, which is no big deal normally, is instantly root in most setups.

During my work with computers, I like to check the usage of system resources in my network. Sometimes a running process takes up too much CPU load, or the disk I/O goes too high. To get a clean picture of how much resources are being used by a client, I used ifstat, top(1) and iostat(1). Since I have found out about dstat, I can cleanly check out all the system resources used by my computers.

As of today, and forever forward, Movable Type is open source. This means you can freely modify, redistribute, and use Movable Type for any purpose you choose.

GNU/Linux is bursting with information about the system on which it runs. The system's hardware and memory, its Internet link and current processes, the latest activity of each user -- all this information and more is available. And, despite such desktop tools as the KDE Control Center or GNOME's System Monitor, the easiest place to get all the system information available is still the command line.