As a PeopleSoft admin, you will need to work with Linux or Unix servers, but you do not need to an expert at Unix or Linux. All you need to be good at are a few things only.
If you want to be great at Unix or Linux – you should get the book UNIX and Linux System Administration Handbook.
Linux Unix Reference
If you want to have a working and good enough knowledge of Unix and Linux, you should refer to this Unix/Linux Command Reference Cheat Sheet courtesy Fosswire.com
Click the image below to download a full PDF. Print it out, stick it on your wall.
If you would like to check our great collection of reference cheat sheets, click here.