Use HISTIGNORE in bash – prevents duplicate entries
Boot a CD image in Qemu – for mounting ISO images in software before burning
CLI file transfer over SSH
Copy a file to host: cat FILE|ssh HOST “cat ->FILE’S-LOCATION-ON-HOST”
Copy a file from a host to current host: ssh HOST “cat FILE”|cat ->FILE’S-LOCATION-ON-CURRENT-HOST
Gentoo Handbook – supposed to be a good reference guide for any distro
Scan your *nix for rootkits
Firewall Ports and Samba File Sharing