duplicate password entry
delete line 'foo:x:1000:1000::/home:/bin/sh'? No
duplicate password entry
delete line 'foo:x:1001:1000::/home:/bin/sh'? No
duplicate shadow password entry
delete line 'Debian-exim:!:12977:0:99999:7:::'? No
user foo: last password change in the future
duplicate shadow password entry
delete line 'Debian-exim:!:12977:0:99999:7:::'? No
pwck: no changes