cdfbottom: 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/cdfbottom - from package: cdftools

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

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