Ubuntu HowTos and Guides

Tutorials, howtos, Q & A about most popular Linux distribution – Ubuntu Linux. Topic includes Ubuntu server security, installation, firewall, web-server, mail-server, proxy server and special focus on desktop users. ( rss feed ).

I‘m new to Ubuntu Linux. How do I mount the hard disk drive from command line?


I recently switched from MS-Windows XP to Ubuntu Linux. How do I use the grep command on Ubuntu or Debian Linux? Can you give us some practical examples?


NFS was not designed with security in mind, and has a number of weaknesses, both in terms of the protocol itself and because any NFS installation must expose several daemons, running on both servers and clients, to network attack. I use my Debian / Ubuntu Linux based server only to server web pages and nothing else. How do I disable NFS services under Debian or Ubuntu Linux?


I want to add more RAM to my server running Ubuntu Linux. How do I find out my current RAM chip information such as its speed, type and manufacturer name within a Linux system without opening the case?


How can I create a text file from the command line on Ubuntu Linux? How do I create an empty file from the command line under Ubuntu operating systems?

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I‘m typing the following command under Ubuntu Linux:

route add default gw eth0

But it is giving me out the following error:

SIOCADDRT: File exists

How do I fix this problem?

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How can I kill a process using the bash command prompt? Do I always need to kill the process using PID?