I'm at the IOSN-ASEAN+3 Training of Trainors in Manila assisting Khairil in the two week training. We are at the University of the Philippines Diliman campus, in their DILC laboratory. It's pretty cool, having two score or so people from various ASEAN countries, alongside Filipinos, participating in a review of LPI level 1 for certification.
Right now, the participants are working through the different text processing commands available in the *N*X environment. Standard fare for getting the most out of your *N*X system and invaluable tools for sysadmins everywhere.
If you are new to *N*X, an old but still very useful text on this is The UNIX Programming Environment by Kernighan and Pike. I found it a helpful introduction to many of the concepts that have made UNIX a powerful environment to work in.
Another book that made working in UNIX easy to understand was UNIX Shell Programming by Kochan and Wood.
I don't know if these books are easily available, but if you spot a copy of either, they are great finds and worth spending on.