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Titre
Error message when editing sudo policy "visudo: Warning: Runas_Alias `SOME_USER' referenced but not defined" -
Description
The following error message is displayed when trying to edit the sudoers policy:"visudo: Warning: Runas_Alias `SOME_USER' referenced but not defined" -
Cause
CAUSE 1:One of your sudoers entries contains a RunAs alias that has not been defined.E.gmyuser ALL=(MYRUNAS_ALIAS) ALLCAUSE 2The entry in the RunAs section is actually a user, however you have used Capital letters for the name.Therefore sudo believes that this is an alias.Note that this error will also occur when using normal sudo and the 'visudo -c' command -
Résolution
RESOLUTION 1:Add the missing RunAs alias to the sudoers file:E.gRunAs_Alias MYRUNAS_ALIAS = otheruserRESOLUTION 2:Avoid having capital letters in the RunAs section if this is a user.Sudo interprets entries starting with capital letters as Aliases.
The message can be safely ignored, however it is best practice to avoid using capital letters for user entries.