Is there a maven command line option for offline mode?

Question

You can specify in your maven settings file that you want to run in offline mode, but is there an equivalent command line option?

I would imagine something like e.g

Answer 1

mvn -o works in most of cases but in some cases it will not enough as from Maven 3 a downloaded artifact from a remote/central repository creates a _remote.repositories file in your local repository with a reference about where the dependency was downloaded.
It may causes some issues if later you don't have access to this remote repository during your builds.
A workaround that may work is using mvn -o -llr yourGoal.

From the help documentation :

 -llr,--legacy-local-repository         Use Maven 2 Legacy Local
                                        Repository behaviour, ie no use of
                                        _remote.repositories. Can also be
                                        activated by using
                                        -Dmaven.legacyLocalRepo=true

 -o,--offline                           Work offline

Another way to execute mvn in an offline way is deleting these _remote.repositories meta data stored in the directory of the downloaded dependencies.