Tag Archives: Linux

linux

How to use the import command to take screenshots?

This tutorial works very well on older versions of Fedora 15. It is necessary that you have ImageMagick installed.

To create a screen capture using the following command:

Use the following command for a png image format:

Command import has options for this purpose without using mouse.

If you want use… Read More »

The indication of a denial of service (DoS) attack.

One common method of denial-of-service attack ( DoS) involves saturating the target machine with external communications requests. If you want an indication of a denial of service (DoS) attack against your system’s , just run this command:

This command executes this steps. Show all tcp connections in numeric format :

Parsing connections that… Read More »

How to display memory in real time on Linux systems.

To display information about memory, we use the following command:

But if we want the data displayed in terminal to be maintained, we will use:

The combination of two orders, will solve our problem. Here is the final command:

Here is the displayed result: It will display used and free memory every… Read More »

Generate an MD5 hash under linux .

I will present two examples to generate an md5 hash from an input string. The first example uses openssl.

The second example uses md5sum.

This is all.