ncoils: 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/bin/ncoils - from package: ncoils

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

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