How to list all iptables rules that are set on your Linux system. This is very easy.

The iptables -L or iptables –list commands will list all of the iptables rules that are set on your Linux machine. Below is the abbreviated output of this command on my Fedora Linux system. [root@localhost homer]# iptables –list Chain INPUT (policy ACCEPT) target prot opt source destination ACCEPT all — anywhere anywhere ctstate RELATED,ESTABLISHED ACCEPT … Read more

Another very useful BIOS simulator. This is for a Phoenix BIOS.

http://www.grs-software.de/sims/bios/phoenix/pages/. This is a BIOS simulator that allows a visitor to practice using a Phoenix BIOS in a web browser. This is a very useful page for playing around with BIOS settings without hurting anything. There is another simulator here: Thinkpad X40 BIOS simulator. This one is also very interesting to play with. More BIOS … Read more

How to find a file with Linux using the command line.

The Linux command line offers useful tools that enable you to find files easily. The find command is one useful example. Here I am using the find command to look for all *.png files in a folder. homer@deusexmachina ~/Documents $ find /usr/share/backgrounds -name "*.png" /usr/share/backgrounds/linuxmint-petra/linux_mint_16.png /usr/share/backgrounds/linuxmint-petra/petra.png /usr/share/backgrounds/warty-final-ubuntu.pnghomer@deusexmachina ~/Documents $ find /usr/share/backgrounds -name "*.png" /usr/share/backgrounds/linuxmint-petra/linux_mint_16.png /usr/share/backgrounds/linuxmint-petra/petra.png … Read more