To list out all Databases in SQL Server run the following query under master:

SELECT name FROM master.dbo.sysdatabases

To list out all SQL Server Jobs with Job Owner details use:

SELECT s.name AS JobName, l.name AS JobOwner
FROM msdb..sysjobs s
LEFT JOIN master.sys.syslogins l ON s.owner_sid = l.sid
WHERE l.name IS NOT NULL
ORDER by l.name

To list out all SQL Server Logins use:

select sp.name as login,
       sp.type_desc as login_type,
       sl.password_hash,
       sp.create_date,
       sp.modify_date,
       case when sp.is_disabled = 1 then 'Disabled'
            else 'Enabled' end as status
from sys.server_principals sp
left join sys.sql_logins sl
          on sp.principal_id = sl.principal_id
where sp.type not in ('G', 'R')
order by sp.name;

To list out all Linked Servers:

select sp.name as login,
       sp.type_desc as login_type,
       sl.password_hash,
       sp.create_date,
       sp.modify_date,
       case when sp.is_disabled = 1 then 'Disabled'
            else 'Enabled' end as status
from sys.server_principals sp
left join sys.sql_logins sl
          on sp.principal_id = sl.principal_id
where sp.type not in ('G', 'R')
order by sp.name;