[Koha] zebra problem

[Mohamed Fekry Negm]

hi to all 
i'm installed koha on debian in last steps in zebra when i run  sudo -u {KOHA_USER} zebrasrv -f /etc/koha/koha-conf.xml
i get   sudo: no passwd entry for {KOHA_USER}! what i shall do now . and when i write in my browser localhost:8080 i get apache page it works . any suggestions , help thank's ti all

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