Catfish is a versatile file searching tool. It is a search GUI powered by locate and find behind the scenes, with autocompletion from Zeitgeist and locate. The advanced options allow filtering by date and file type. The interface is intentionally lightweight and simple, using only GTK+.

Features:

• search files anywhere on your computer, include mounted partitions.
• search hidden files
• search files by modified time
• search files by type

Install Catfish File Search:

You can install Catfish file searching tool in Ubuntu 13.04 Raring, Ubuntu 12.10 Quantal, Ubuntu 12.04 Precise and their derivatives, such as Linux Mint and Elementary OS.

Press Ctrl+Alt+T on your keyboard to open terminal. When it opens, run below commands one by one to install the tool:

sudo add-apt-repository ppa:catfish-search/catfish-stable

sudo apt-get update

sudo apt-get install catfish

Once done, you can open it from Unity Dash: