Exadata Command Reference on Oracle Technology Network
Intro http://www.oracle.com/technetwork/articles/oem/exadata-commands-intro-402431.html
Part 1 Jumpstarting Exadata http://www.oracle.com/technetwork/articles/oem/exadata-commands-part1-402441.html
Part 2 Command Categories http://www.oracle.com/technetwork/articles/oem/exadata-commands-part2-402442.html
Part 3 Storage Management http://www.oracle.com/technetwork/articles/oem/exadata-commands-part3-402445.html
Part 4 http://www.oracle.com/technetwork/articles/oem/exadata-commands-part4-402446.html
Advanced Linux Commands. on Oracle Technology Network
http://www.oracle.com/technetwork/articles/linux/part1-091089.html
http://www.oracle.com/technetwork/articles/linux/part3-090589.html
http://www.oracle.com/technetwork/articles/linux/part2-085179.html
http://www.oracle.com/technetwork/articles/linux/part4-097181.html
http://www.oracle.com/technetwork/articles/linux/part5-096399.html
11g New Features on Oracle Technology Network
http://www.oracle.com/technetwork/articles/sql/index-099021.html
10g New Features on Oracle Technology Network
http://www.oracle.com/technetwork/articles/sql/index-082320.html.
Project Lockdown (Security) on Oracle Technology Network
http://www.oracle.com/technetwork/articles/index-087388.html