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who has a pdf file that contain list of all linux commands

Hello and Welcome to LinuxQuestions,

There are so many PDF documents available on the internet if you use Google. Remember that Google is one of your bests friends if you're looking for something. Also there are a lot of very good sites like for example:
http://www.linuxmanpages.com/
that holds about any Linux command you can think of. If you really need it to be in PDF then look for ebooks on the matter using Google. You'll see that you'll find A LOT of them that will suite your needs.

Kind regards,

Eric

"All linux commands" is a pretty broad range. What distro are you using?

Some of my favorite are "cheet sheets" that may mostly apply to particular distros. Here's a good site with lots of PDF's. You'll probably be interested in the BASH sheet (the typical linux commandline, although there are others), maybe one of the distro specific sheets like Debian or Red Hat, and the others will depend on what you want to do.