cdfclip: 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/cdfclip - from package: cdftools

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

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