To make VSS work on Linux guest OS, you need to put custom scripts called pre-freeze-script and post-thaw-script into
/usr/sbin directory and give them executive permissions. When the backup job starts running, NAKIVO Backup & Replication triggers these scripts.
Freeze and thaw scripts require root permissions to be executed.
If When a non-root user executes the scripts via sudo command, is used, scripts invocation will be done via
sudo, therefore the following requirements must be met.