NcFTPd general.cf file configuration
Don't forget to restart NcFTPd after modifying the general.cf file.
By default, NcFTPd does not lock a file in the process of uploading. If you want to be sure that no two remote users upload into the same file at the same time, you can set this option to yes to request that NcFTPd use advisory file locking.
Note that this setting does not prevent a remote user from downloading a file that is being uploaded; set lock-downloads to yes in addition to lock-uploads to yes if you require this.