I wonder why aren't there any tool that enable one to find files on his harddisk very rapidly like "search everything" does .Just type a part of the file name and all files containing the keyword will show up instantly . Isn't it possible to design a program to record the names of all files in some directory in a database so that you can search the database quickly for file names ?
sudo updatedb and
locate [ filename or part ]
updatedb updates the index database.
If you want to locate a program, run
whereis [ program name ]
If you are looking for file names only, it allready does this, it is called
More options you can find here: https://help.ubuntu.com/community/FindingFiles