groups (1) Linux Manual Page
groups – print the groups a user is in Synopsisgroups [,OPTION/]… [,USERNAME/]… DescriptionPrint group memberships for each USERNAME or, if no USERNAME is specified, for the current process (which may differ if the groups database has changed). –help display this help and exit –version output version information and exitAuthorWritten by David MacKenzie and James Youngman….
