nfsdcltrack: 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 Debian possible default full paths are:

/usr/sbin/nfsdcltrack - from package: nfs-kernel-server

You may install the required package with command apt-get install {package}

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