A neat feature to find files.
first update the database
ubuntu$ sudo updatedb
ubuntu$ sudo updatedb
[sudo] password for user:
Now you can run the locate command to find any key word you want.
ubuntu:$ locate dynamips
/usr/bin/dynamips
/usr/lib/pymodules/python2.6/dynamips_lib.py
/usr/lib/pymodules/python2.6/dynamips_lib.pyc
/usr/share/doc/dynamips
/usr/share/doc/dynamips/README.Debian
/usr/share/doc/dynamips/README.gz
/usr/share/doc/dynamips/README.hypervisor.gz