SQL & PL/SQL

I want to be a plsql developer, now reading job ads for the technical requirement.

This is a typical plsql job ad:
"Technically those applying MUST have a minimum 5 years Oracle PL/SQL design and development experience combined with 3 years Informatica/ ETL exposure. You should be comfortable working off Unix platforms and associated *Shell Scripting* and database performance tuning. Experience with vendor products surrounding the compliance area such as Mantas or Actimize is highly beneficial. "

Generally, do plsql developers work with shell scripting on a basic level, like echoing, saving files, looping etc, well, this level? : Linux Programming for dummies [ http://www.amazon.com/LINUX-Programming-Dummies-Jim-Keogh/dp/0764506919/ref=sr_1_1?ie=UTF8&s=books&qid=1256352450&sr=1-1|http://www.amazon.com/LINUX-Programming-Dummies-Jim-Keogh/dp/0764506919/ref=sr_1_1?ie=UTF8&s=books&qid=1256352450&sr=1-1] . Er...this kind of of shell programming is kinda easy, why bother even putting the requirement in the ad? It's like saying you need to know primary school maths for the job.

Or plsql developers work with unix programming at this kernel programming level, like semaphores, signal, like this book: UNIX Systems Programming: Communication, Concurrency and Threads? [http://www.amazon.com/UNIX-Systems-Programming-Communication-Concurrency/dp/0130424110/ref=sr_1_6?ie=UTF8&s=books&qid=1256350650&sr=1-6|http://www.amazon.com/UNIX-Systems-Programming-Communication-Concurrency/dp/0130424110/ref=sr_1_6?ie=UTF8&s=books&qid=1256350650&sr=1-6]

I got plsql and sql tuning requirement under control, now need your help to know what level of expertise is required for unix shell scripting. What plsql developers generally do with unix shell scripting? Can you recommend a book to read?

Many advance thanks.

Edited by: sunflower on Oct 23, 2009 7:48 PM

Edited by: sunflower on Oct 23, 2009 7:49 PM

Edited by: sunflower on Oct 23, 2009 7:50 PM