Are you referencing typing something in the notes or actually scribbling something using a digital pen/pencil or finger? If you are referencing just typing thi

Are you referencing typing something in the notes or actually scribbling something using a digital pen/pencil or finger? If you are referencing just typing things in, normally grep -rI "" * --color=auto may help (if you are using the newer grep) for a small dataset or find /path/to/data -type f -a -exec grep -H WHATAMILOOKINGFOR '{}' \; which I will normally just turn into an function I can run from any terminal. For larger searching I normally use Solr, Lucene, ElasticSearch, Kibana, Sphinx and other tools to give me more technical vision into what I am searching for and/or things relative to what I was thought I was searching for. For things that I have taken pictures of or manually drawn I use OCR and other custom tech to convert it to computer friendly searchable information to be able to include it into my search queries and create a helper app for Windows, MacOS, Linux and Unix to search through my apps API to give me both the textual, graphical and meta data results that I can then filter down to what I am looking for. If you need something to help get you started on OCR of any notes or documents you have I would recommend looking into Tesseract as a start if you are not interested in building your own OCR tools from scratch.