Is it OK to use cp -a and tar -czf commands to backup my nginx and letsecnrypt folders?
Since i have 70 websites on my droplet I want to copy my nginx and letsencrypt folders then compress them and lastly send them to S3.
Im thinking of using the cp -a command which they tell me preserves symlinks and pretty much everything within the folder structure (permissions for example).
After that i would like to use the tar -czf command to compress the folder before sending it to S3
Is this a sane way of doing this?
Also, a different question: what is the advantage of using rsync intead of cp -a i mean cp -a it's pretty straight forward. Why would i want to use rsync in this case? (to backup the whole letsencrypt folder for example) .
Thanks in advanced!