The fncopy command handles the FNS-related aspects of changing your underlying enterprise-level naming service from NIS to NIS+. This command copies and converts NIS-based FNS contexts to NIS+ based contexts.
| fncopy [-i oldsvc -o newsvc] [-f filename] oldctx newctx | 
| Option | Description | 
|---|---|
| -i oldsvc | Source naming service. Only nis or files may be specified. | 
| -o newsvc | Target naming service. Only nisplus or nis may be specified. | 
| -f filename | Name of file listing the FNS contexts to be copied | 
| oldctx | Old FNS context to be copied | 
| newctx | Target new FNS context | 
For example, to copy the contexts listed in the file /etc/sales_users from the doc.com domain of a NIS-based naming service to the sales.doc.com domain of an NIS+ naming service, you would enter:
| fncopy -i nis -o nisplus -f /etc/sales_users org/sales.doc.com/user |