Some very interesting and useful Linux commands.

Stripping comments out of a configuration file can be useful when submitting it to a forum for others to study. This is how to do this.

ubuntu /etc/ssh $ grep -vE '^#' sshd_config

This will print the file to the terminal, allowing the user to copy the text with all comments stripped out. Very useful trick.

How to add a default route to a DNS server manually in Linux. (Source)

jason@darknet:~$ sudo ip route add 0/0 via 172.29.59.1 dev wlan0

How to use the Linux cat command to read the contents of a folder. This is a cool trick.

http://securitronlinux.com/bejiitaswrath/how-to-use-the-linux-cat-command-to-read-the-contents-of-a-folder-this-is-a-cool-trick/.

Removing and creating files on UNIX/Linux and using the shred command.

http://securitronlinux.com/debian-testing/removing-and-creating-files-on-unixlinux-and-using-the-shred-command/.

Some very useful Linux commands.

http://securitronlinux.com/useful-linux-commands/.