Securely Wipe Hard Drive in Linux | To wipe a hard disk down to zeros, use the dd command. $ sudo dd if=/dev/zero of=/dev/sdX bs=1M Where /dev/sdX is the drive you want to zero out. Be extremely careful – there is no undo! For example, this zeros out the specific disk “/dev/sdf” on my system: stmiller@brahms:~$ sudo dd if=/dev/zero of=/dev/sdf bs=1M This
Hardending Red Hat Linux, OS X, and Windows | The security folks at the NSA have online guides on how to secure Linux, OS X, and Windows operating systems. These are definitely worth a read of all articles even if an OS in question is not your main cup of tea. Here is the link: http://www.nsa.gov/ia/guidance/security_configuration_guides/operating_systems.shtml Page has been taken down This direct link
Generate Strong Passwords | How can I generate strong passwords from the command line? The excellent program apg is fantastic for generating all sorts of passwords. 1. Install apg: $ sudo apt-get install apg 2. Then you can simply run $ apg …which will run default options and give something like this: stmiller@li166-66:~$ apg Please enter some random data
Securing Apache and PHP | A few simple adjustments to keep Apache and PHP from displaying so much information about your server.