I have a main text file I refer to and make edits in throughout the day ... as a developer I keep any programming specific nuggets here ... each topic has its area as in

ubuntu tricks ___________

keeping one file makes it easier to search or browse ... separately I have other text files for broad categories like nyc, shop, bb ( catch all )

from a terminal ( Ubuntu ) I enter this to search

svl 'some string here'

where svl is an alias to a bash script containing

stringPattern=$1

cat ~/MEGA/notes.txt | grep --color=auto -B 10 -A 15 -i "$stringPattern"

I use mega nz for cloud storage so all this is mirrored on any box I use ... been using similar my entire career so this file today has over 90,000 lines of text notes ... I find such a process essential to be productive across a vast array of problem domains