openscad: 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/openscad - from package: openscad

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

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