Software for text search in files

There is a very nice one that ships with Ubuntu out of the box.

1. Open the Dash (Super key or the Ubuntu button) and begin typing until you find Search for Files

   

2. The above is for Unity, the default Desktop Environment in Ubuntu. In menu-driven environments, go to Applications -> Accessories -> Search for Files

   

3. Expand the Select more options section and enter the text to search for in the Contains the text: input field.

   

Features:

• 100% GUI
• You can search for file names or content
• It does look in sub-folders.

Given your scenario (no terminal commands, simple to use interface) I think theres no better option.

PS: on the Contains the text: input field the '.' character is a wildcard. To escape it you have to use '[]'. E.g.: type Contains the text: [.]myFunction to search for .myFunction

use

 grep -nr <your text> .

put the text that you want to find inside the <your text>

I am a fan of searchmonkey (GPL, free, cross-platform, pretty light on resources and very fast).