Administrate YunoHost in command line

The command line interface (CLI) is, in the computer world, the original (and more technical) way of interacting with a computer compared to graphical interface. Command line interfaces are generally said to be more complete, powerful or efficient than a graphical interface, though it is more difficult to learn.

In the context of YunoHost, or system administration in general, the CLI is commonly used to remotely control machines after connecting through connecting to it via SSH.

Providing a full tutorial about the command line is quite beyond the scope of the YunoHost documentation : for this, consider reading a dedicated tutorial such as this one or this one. But be reassured that you don't need to be a CLI expert to start using it !

The yunohost command can be used to administrate your server and perform the various actions similarly to what you do on the webadmin. The command must be launched either from the root user or from the admin user by preceeding them with sudo. (ProTip™ : you can become root with the command sudo su as admin).

YunoHost commands usually have this kind of structure :

yunohost app install wordpress --label Webmail
          ^    ^        ^             ^
          |    |        |             |
    category  action  argument      options

Don't hesitate to browse and ask for more information about a given category or action using the the --help option. For instance, those commands :

yunohost --help
yunohost user --help
yunohost user create --help

will successively list all the categories available, then the actions available in the user category, then the usage of the action user create. You might notice that the YunoHost command tree is built with a structure similar to the YunoHost admin pages.