Synchronize Drives ​

rsync is the simplest way to synchronize two drives.

Can't remember where to sync to/from? leave notes in sync.md with the specific commands used.

I forget... do I keep a slash at the end? or does that cause it to be in a subdirectory.

If the destination directory exists, keep a slash at the end of the source directory. If the destination does not already exist, keeping a slash at the source directory will result in everything in source being placed in the main directory of the destination, which may not be what you want.

Comparisons / Diff ​

To compare two directories:

diff -q directory-1/ directory-2/

diff -q directory-1/ directory-2/

or recurse into subdirectories:

diff -qr directory-1/ directory-2/

diff -qr directory-1/ directory-2/

via:
https://www.tecmint.com/compare-find-difference-between-two-directories-in-linux/

meld ​

There is also a utility called meld. Haven't tried that yet. Notes?

sudo apt install meld

sudo apt install meld