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Build Identifier: 

I can find in the po file of yast-control:
Server is usefull when computer should not have interaction with user and have
only command line.

It should be usefully as an adverb instead of usefull.
Additional to that I would write "with the user" and "only the command line".

Reproducible: Always

Steps to Reproduce:
1. read entry 64 of the po file (yast-control)

Actual Results:  
spelling error

Expected Results:  
correct text