Hello Alex,
1 : We need to download and install RALUS for Backup Exec 10.0 from
http://fileconnect.symantec.com by entering any serial number for Backup Exec 10.0
2 : We need to transfer the file on the Linux box using free tools like WinSCP
Please follow the Symantec KB to install RALUS
http://support.veritas.com/docs/282010
Step by step installation of the Backup Exec Remote Agent for Linux and UNIX Servers (RALUS) on the Red Hat Linux platform.
Let me know if you have any issues.