Example:
grep -r 'word' /home/fran/Emails

If you want to find directories, use:
find . -type d | grep directory name

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Add a directory to subdirectories of a tree:

A folder on a Windows machine consists of a list of 400 buildings where various electrical etc tests are made (see above).  Under the main folder each building has a subfolder, which in turn has subfolders for each item tested, e.g. Fire Alarms, Emergency Lighting etc.  A folder for Induction Loop testing had to be added to each building record.  How to do this on Windows?

Steve of DGA wrote this script for me.

The folder in question was rsync'd to a Linux server, the script was run and the result put back onto Windows.

Delete Windows-type "cruft" from a fileserver:

find . -type f -name *.tmp -exec rm -vf {} \;

find . -type f -name Thumbs.db -exec rm -vf {} \;

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The incredible power of the *NIX command line never ceases to amaze me!