How do you find out that somebody has accessed your system and changed your configuration or security settings? How do you verify file content? There is no simple answer to these questions. Personally, I use specialized tool such as tripwire and combination of perl / shell script, UNIX command line utilities. Examine methods of storing […]


Verifying integrity of the tar balls or source code is an essential step, which makes sure that you are going to use guanine software (also know as checksum). Every Linux or UNIX admin should be aware of this test. However, what is a checksum? A checksum is a form of a very simple measure for […]


Linux comes with the system utility fsck (“file system check”) for checking the consistency of a file system. This quick post explains how to use fsck to fix error.