Familiar with the round dance Wordpress settings on DigitalOcean?

Question

SSH

Hello comrades,
please give me an idea or an article, what needs to be done in order to be able to install themes / plugins for WP on the DO cloud?
I click install the plugin, it asks me (for example, if via ftp : host, username, pass)
and if via ssh, it also requests a public and private key, which was successfully created and fed, but here's the trouble ... neither ftp hawala, nor ssh data. However, it works fine through the ssh terminal, and through filezilla I have access to ftp.
Maybe he doesn't have access? ls -l shows -rw-r--r--.
First time trying to make friends with all this. I will be grateful.

Answer 1

Access denied to directory. Make the owner of the user running the web server:
ps -fA | grep httpd|apache|nginx | grep -v root | head -1 | cut -c1-6
chown /pathtofolderwordpress username from the line above