cduce: 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/cduce - from package: cduce

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

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