Brontekst bekijken van Newaliases or new aliases.db file creation.

To create or update the /etc/aliases.db file for mail systems like Postfix or Sendmail, populate the /etc/aliases text file with mappings, then run newaliases or postalias /etc/aliases. This compiles the text file into a Berkeley DB binary format for faster lookup, eliminating the need to restart the mail service. 

Steps to Create/Update aliases.db:
Edit the Alias File: Open /etc/aliases (or /etc/mail/aliases) with a text editor.

 sudo nano /etc/aliases

Add Aliases: Add your aliases in the format localname: destination1, destination2.

 # Example
 postmaster: root
 admin: user1, user2

Generate the Database: Run the following command to create/update the .db file.

 sudo newaliases
OR
 sudo postalias /etc/aliases
 
Note: On some systems, /etc/aliases is a symlink to /etc/mail/aliases.