On Ubuntu with uutils coreutils 0.8.0, chown USER: FILE changes the owner but does not change the group to USER's login group.
GNU coreutils behavior and the documented chown semantics are that chown USER: FILE, with a colon but no explicit group, should change the group to USER's login group. chown USER FILE should leave the group unchanged.
On Ubuntu with uutils coreutils 0.8.0,
chown USER: FILEchanges the owner but does not change the group to USER's login group.GNU coreutils behavior and the documented chown semantics are that
chown USER: FILE, with a colon but no explicit group, should change the group to USER's login group.chown USER FILEshould leave the group unchanged.