You can always use Slackware package management tool such as slackpkg to upgrade software or install security patches for your Slackware system. However, the ftp server mirrors took sometimes to update the latest software or security patches to their server. So the best way is to upgrade them yourself. This is an example on how to upgrade software or install security patches for Slackware Linux. First thing you need to do is to subscribe the Slackware security mailing list from Slackware website.

Linux permission is a very interesting topic. It is part of Linux security and mandatory knowledge for Linux administration. Linux permission controls all files and directories in the Linux system. So every Linux user must understand how Linux permission works including end user, who only uses desktop application or x-window.

Computer security has become a critical subject in information technology system these days. If we looked back in history, the security threat has started a long time ago during 1970s when telephone system has been hacked. Many computer crimes happened and as a result, the Computer Fraud and Abuse Act has been made in 1980s. As technology advanced, the evolution of computer networking and the born of Internet, the threats to information and networks have risen significantly. The well-known harassment and destructive attacks are denial of service (DOS), mail bombs and list-linking, viruses, worms and Trojan horses.

The Linux finger command displays information about the system users. We can view all information about user if we know the user account login name. Below are some examples of the Linux finger command with useful options that you can use to view user information.

Type 'finger' at the command prompt without any option will give an output of users currently log in the system:

Linux file and directory ownerships guide

Managing file and directory ownerships are important administration task in Linux. Setting up ownership means give security to a file or directory.