cache2gtiff: 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/cache2gtiff - from package: qlandkartegt

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

Error in other languages:
cache2gtiff: bevel nie gevind nie
cache2gtiff: comandă negăsită
cache2gtiff: comando não encontrado
cache2gtiff: commande introuvable
cache2gtiff: command not found
cache2gtiff: käsku ei ole
cache2gtiff: không tìm thấy lệnh
cache2gtiff: komanda nerasta
cache2gtiff: Kommando nicht gefunden.
cache2gtiff: kommandot finns inte
cache2gtiff: komut yok
cache2gtiff: nie znaleziono polecenia
cache2gtiff: níor aimsíodh an t-ordú
cache2gtiff: no se encontró la orden
cache2gtiff: no s'ha trobat l'ordre
cache2gtiff: opdracht niet gevonden
cache2gtiff: parancs nem található
cache2gtiff: perintah tidak ditemukan
cache2gtiff: príkaz nenájdený
cache2gtiff: příkaz nenalezen
cache2gtiff: команда не найдена
cache2gtiff: командата не е открита
cache2gtiff: 命令找不到
cache2gtiff: コマンドが見つかりません