nsdb-remove-nci: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/sbin/nsdb-remove-nci - from package: fedfs-utils-admin

You may install the required package with command yum install {package}

Error in other languages:
nsdb-remove-nci: bevel nie gevind nie
nsdb-remove-nci: comandă negăsită
nsdb-remove-nci: comando não encontrado
nsdb-remove-nci: commande introuvable
nsdb-remove-nci: command not found
nsdb-remove-nci: käsku ei ole
nsdb-remove-nci: không tìm thấy lệnh
nsdb-remove-nci: komanda nerasta
nsdb-remove-nci: Kommando nicht gefunden.
nsdb-remove-nci: kommandot finns inte
nsdb-remove-nci: komut yok
nsdb-remove-nci: nie znaleziono polecenia
nsdb-remove-nci: níor aimsíodh an t-ordú
nsdb-remove-nci: no se encontró la orden
nsdb-remove-nci: no s'ha trobat l'ordre
nsdb-remove-nci: opdracht niet gevonden
nsdb-remove-nci: parancs nem található
nsdb-remove-nci: perintah tidak ditemukan
nsdb-remove-nci: príkaz nenájdený
nsdb-remove-nci: příkaz nenalezen
nsdb-remove-nci: команда не найдена
nsdb-remove-nci: командата не е открита
nsdb-remove-nci: 命令找不到
nsdb-remove-nci: コマンドが見つかりません