This commands checks if a command is registered with EE. If the command is found then it returns with exit status 0. If the command doesn't exist, then it will exit with status 1.
# The "site delete" command is registered.
$ ee cli has-command "site delete"
# The "foo bar" command is not registered.
$ ee cli has-command "foo bar"
Check to see if there is a newer version of EE available.
Print various details about the EE environment.
Update EE to the latest release.