NcFTPd general.cf file configuration
Don't forget to restart NcFTPd after modifying the general.cf file.
The server keeps portions of the filesystems information cached for performance. This is called the ls cache because it is mostly used for doing the equivalent of a /bin/ls. The ls cache holds entire directories in a pre-computed form so it can quickly reformat or redisplay one to a remote user.
The ls-cache-dir-age option configures how long (in seconds) a directory will remain in cache, before being considered stale. The real directory's modification time is checked each time, so this option specifies the longest time it will be left in the cache.