Recoll

Recoll is a desktop full-text search tool. It finds keywords inside documents as well as file names.

Versions are available for Linux and MS Windows.
A WEB front-end with preview and download features can replace or supplement the GUI for remote use.
It can search most document formats. You may need external applications for text extraction.
It can reach any storage place: files, archive members, email attachments, transparently handling decompression.
One click will open the document inside a native editor or display an even quicker text preview.
The software is free, open source, and licensed under the GPL.

Most distributions feature prebuilt packages for Recoll. In any case, the instructions for building and installing are here.