Migrating users from one Debian server to another involves transferring user account information, including user details, group information, and home directories. Here are the general steps based on the provided search results:

1. Backup User Account Information:

   • On the source server, back up the following files:
     • /etc/passwd: Contains user account information.
     • /etc/group: Contains group information.
     • /etc/shadow: Contains encrypted passwords for users.
     • /var/spool/mail: Contains user mail.
     • /home: Contains user home directories.

2. Transfer Backup to New Server:

   • Copy the backup files to the new server using a secure method such as scp or rsync.

3. Restore User Account Information:

   • On the new server, append the contents of the backup files to the corresponding system files using commands like cat or tee.

4. Transfer Home Directories (if applicable):

   • If necessary, transfer the user home directories to the new server using tar or a similar method.

5. Verify User Migration:

   • Verify that the user accounts and home directories have been successfully migrated to the new server.

It's important to note that user migration involves sensitive information, and careful planning and testing are essential to ensure a smooth transition. Additionally, it's crucial to perform these actions with proper permissions and consider the security implications of user data migration.

Citations: [1] https://unix.stackexchange.com/questions/345678/how-to-copy-all-user-on-from-one-linux-server-to-another-linux-server [2] https://www.cyberciti.biz/faq/howto-move-migrate-user-accounts-old-to-new-server/ [3] https://www.funoracleapps.com/2020/06/how-to-migrate-os-user-accounts-from.html?m=1 [4] https://serverfault.com/questions/328071/linux-migration-from-a-server-to-another [5] https://access.redhat.com/solutions/179753