In drupal 7 I used to just do a drush vset theme to change the theme in the command line, but that doesnt work in drupal 8 anymore. How would one change the theme in the command line for drupal 8 using drush?
you can do the following:
drush config-set system.theme default bartik
Here are the commands for drupal 8 using drush. Its called "config" now:
Config commands: (config) config-edit (cedit) Open a config file in a text editor. Edits are imported into active configuration after closing editor. config-export (cex) Export configuration to a directory. config-get (cget) Display a config value, or a whole configuration object. config-import (cim) Import config from a config directory. config-list (cli) List config names by prefix. config-pull (cpull) Export and transfer config from one environment to another. config-set (cset) Set config value directly. Does not perform a config import.