Who owns this port

Several utilities exist to check which ports are open, who is connected to your system and even what process owns a port number. First a…

Names and name servers

Internet hostnames and domains are resolved using the Domain Name System (DNS) using Name Servers (NS). These name servers are usually hosted by your Internet…

Secure alternative to telnet

Secure alternative to telnet Telnet is a protocol allowing you to connect to a remote system and run programs and commands on that system. It…

Accessing remote file systems

Accessing remote file systems SMB is the most popular protocol to access Windows systems. But from the Unix world comes NFS. NFS is a way…

Access to various networks

Big corporations often sub-divide their networks into small networks, hidden behind gateways. To access them, you need to tell your Linux system that there is…

International keyboards

The X Window System comes by default with an english keymap on most distributions. If you have a keyboard from another country, it may be…

Device drivers

Hardware devices are not of much use without device drivers. Fortunately, the Linux kernel, like every other operating system, comes with a lot of them….