Provided by: passwd_4.2-3.1ubuntu5.4_amd64 bug


       subuid - the subordinate uid file


       Each line in /etc/subuid contains a user name and a range of subordinate user ids that
       user is allowed to use. This is specified with three fields delimited by colons (“:”).
       These fields are:

       •   login name

       •   numerical subordinate user ID

       •   numerical subordinate user ID count

       This file specifies the user IDs that ordinary users can use, with the newuidmap command,
       to configure uid mapping in a user namespace.

       Multiple ranges may be specified per user.


           Per user subordinate user IDs.

           Backup file for /etc/subuid.


       login.defs(5), newgidmap(1), newuidmap(1), newusers(1), subgid(5), useradd(8), userdel(8),
       usermod(8), user_namespaces(7).