ncpdq: 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/bin/ncpdq - from package: nco

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

On Debian possible default full paths are:

/usr/bin/ncpdq - from package: nco

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

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