cvs-debc: 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/cvs-debc - from package: devscripts

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

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