# userdbctl > Inspect users, groups and group memberships on the system. > More information: . - List all known user records: `userdbctl user` - Show details of a specific user: `userdbctl user {{username}}` - List all known groups: `userdbctl group` - Show details of a specific group: `userdbctl group {{groupname}}` - List all services currently providing user/group definitions to the system: `userdbctl services`