How to download all the RHEL7 docs

You can easily download all of the available Red Hat Enterprise Linux 7 Documentation (in PDF format) from a BASH prompt, by using the following command line:

curl -s | grep -o '[^"]*Linux/7/pdf[^"]*' | xargs -I{} wget{}

This is very handy when you are studying for RHEL 7 Certification (RHCSA/RHCE). All the answers to the test are in these docs...  :-)